LTR-553ALS-01

Optical Sensor Product Data Sheet LTR-553ALS-01 Spec No.: DS86-2014-0007 Effective Date: 07/17/2014 Revision: - LITE-ON DCC RELEASE BNS-OD-FC001/A4 LITE-ON Technology Corp. / Optoelectronics No.90,Chien 1 Road, Chung Ho, New Taipei City 23585, Taiwan, R.O.C. Tel: 886-2-2222-6181 Fax: 886-2-2221-1948 / 886-2-2221-0660 http://www.liteon.com/opto Optical Sensor LTR-553ALS-01 1. Description 2 The LTR-553ALS-01 is an integrated low voltage I C digital light sensor [ALS] and proximity sensor [PS] with built-in emitter, in a single miniature chipled lead-free surface mount package. This sensor converts light intensity to a digital output signal 2 capable of direct I C interface. It provides a linear response over a wide dynamic range from 0.01 lux to 64k lux and is well suited to applications under high ambient brightness. With built-in proximity sensor (emitter and detector), LTR-553ALS-01 offers the feature to detect object at a user configurable distance. The sensor supports an interrupt feature that removes the need to poll the sensor for a reading which improves system efficiency. The sensor also supports several features that help to minimize the occurrence of false triggering. This CMOS design and factory-set one time trimming capability ensure minimal sensor-to-sensor variations for ease of manufacturability to the end customers. 2. Features  I C interface (Fast Mode @ 400kbit/s)  Ultra-small ChipLED package  Built-in temperature compensation circuit  Low active power consumption with standby mode  Supply voltage range from 2.4V to 3.6V capable of 1.7V logic voltage  Operating temperature range from -30ºC to +70ºC  RoHS and Halogen free compliant  Light Sensor  2  Close to human eye spectral response  Immunity to IR / UV Light Source  Automatically rejects 50 / 60 Hz lightings flicker  6 dynamic range from 0.01 lux to 64k lux  16-bit effective resolution Proximity Sensor  Built-in LED driver, emitter and detector  Programmable LED drive settings  11-bit effective resolution  High ambient light suppression 1/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 3. Applications To control display backlight in  Mobile Devices: Mobile phone, PDA  Computing Devices: Notebook PC, Desktop Monitor  Consumer Devices: LCD/PDP TV backlight systems, Cameras, Personal Navigation Device, Digital Photo Frame  Dashboard 4. Ordering Information Part Number Packaging Type Package Quantity LTR-553ALS-01 Tape and Reel 8-pin chipled package 8000 2/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 5. Outline Dimensions 1. All dimensions are in millimeters 3/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 6. Functional Block Diagram 7. Application Circuit LTR-553ALS 4/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 I/O Pins Configuration Table Pin I/O Type Symbol Description 1 I/O SDA I2C serial data. This pin is an open drain input / output. 2 O INT Level Interrupt Pin. This pin is an open drain output. 3 I LDR LED Driver for proximity emitter. This pin is an open drain input. 4 O LED K LED Cathode. Connect to LDR pin if using internal LED driver circuit. 5 I LED A LED Anode. Connect to VDD or VBAT on PCB GND Ground SCL I2C serial clock. This pin is an open drain input. VDD Power Supply Voltage 6 7 8 I LTR-553 Recommended Application Circuit Components Component Recommended Value Rp1, Rp2, Rp3 [1] 1 k to 10 k C1, C2 1uF 20%, X7R Ceramic [1] Selection of pull-up resistors value is dependent on bus capacitance values. For more details, please 2 refer to I C Specifications: http://www.nxp.com/documents/user_manual/UM10204.pdf 5/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 8. Ratings and Specifications Absolute Maximum Ratings at Ta = 25C Parameter Symbol Rating Unit 3.8 V Supply Voltage VDD Digital Voltage Range SCL, SDA, INT -0.5 to 3.8 V Digital Output Current SCL, SDA, INT -1 to 20 mA Storage Temperature Tstg -40 to 100 C Note: Exceeding these ratings could cause damage to the sensor. All voltages are with respect to ground. Currents are positive into, negative out of the specified terminal. Recommended Operating Conditions Description Symbol Supply Voltage VDD LED Supply Voltage Min. Typ. Max. Unit 2.4 3.6 V VLED 2.5 4.35 V Interface Bus Power Supply Voltage VIO 1.7 3.6 V Operating Temperature Tope -30 70 C Electrical & Optical Specifications All specifications are at VDD = 3.0V, Tope = 25C, unless otherwise noted. Parameter Min. Typ. Active Supply Current Standby Current Initial Startup Time Wakeup Time from Standby 60 100 Max. Unit Condition 250 uA Active Mode, Tope = 25C 5 uA Standby / Sleep Mode 1000 ms (Note 1) 10 ms (Note 1) 6/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 Light Sensor Parameter Min. Typ. Max. Unit 65535 count 0 6 count Ch0, Lux = 0 0 6 count Ch1, Lux = 0 Full Scale ADC Count Condition Dark ADC Count Ch0 520 1070 count ADC Count (Gain=8) White LED 200 Lux Integration Time : 50ms Measurement Time : 100ms Ch1 180 390 count White LED 200 Lux Integration Time : 50ms Measurement Time : 100ms ALS Ratio 0.15 0.26 Ratio = Ch1/(Ch1 + Ch0) 0.35 Lux = 200 (White LED) Proximity Sensor Parameter Min. Typ. Full Scale ADC Count Peak Sensitivity 840 Detection Distance 20 855 Max. Unit 2047 count 870 nm nm Condition 100mA, 4 pulses, 18% Gray card Ambient Light Suppression 50k Lux 1 15 Pulses LED Pulse Frequency 30k 100k Hz Increment of 10k Hz LED Duty Cycle 25 100 % Increment of 25% 5 mA LED Peak Current = 000 10 mA LED Peak Current = 001 20 mA LED Peak Current = 010 LED Pulse Count LED Peak Current Direct sunlight 7/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 Optical Rise / Fall Time 100 50 mA LED Peak Current = 011 100 mA LED Peak Current = 1XX ns Note 1: Startup Sequence Supply VDD to Sensor (Sensor in Standby Mode) Wait 100 ms (min) - initial startup time I2C Command (Write) To enable sensor to Active Mode Wait 10 ms (max) - wakeup time from standby Sensor is Active and starts measurement LUX Formula Refer to Appendix A for the lux formula 8/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 AC Electrical Characteristics All specifications are at VBus = 1.8V, Tope = 25C, unless otherwise noted. Parameter Symbol f SCL SCL clock frequency Min. 1 Max. Unit 400 kHz Bus free time between a STOP and START condition t BUF 1.3 us Hold time (repeated) START condition. After this period, the first clock pulse is generated t HD;STA 0.6 us LOW period of the SCL clock t LOW 1.3 us HIGH period of the SCL clock t HIGH 0.6 us Set-up time for a repeated START condition t SU ;STA 0.6 us Set-up time for STOP condition t SU ;STO 0.6 us Rise time of both SDA and SCL signals tr 30 300 ns Fall time of both SDA and SCL signals tf 30 300 ns Data hold time t HD; DAT 0.3 0.9 us Data setup time t SU ; DAT 100 Pulse width of spikes which must be suppressed by the input filter t SP 0 ns 50 ns 2 Definition of timing for I C bus 9/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 9. Principles of Operation 2 I C Protocols ．I2C Write Protocol (type 1): 1 7 1 1 8 1 1 S Slave address W A Register Address A P 1 8 Slave ID (Write) Slave ID (Write) 1 2 3 4 5 6 7 8 S 6 S 5 S 4 S 3 S 2 S 1 S 0 9 2 3 4 5 6 7 9 SCL SDA S Slave address A A A A A A A A 7 6 5 4 3 2 1 0 W A Register Address A P 2 ．I C Write Protocol (type 2): 1 7 1 1 8 1 S Slave address W A Register Address 8 1 1 A Register Command A P Slave ID (Write) Slave ID (Write) 1 2 3 4 5 6 7 8 S 6 S 5 S 4 S 3 S 2 S 1 S 0 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 SCL SDA S A A A A A A A A 7 6 5 4 3 2 1 0 Slave address W A Register Address A A A A A A A A 7 6 5 4 3 2 1 0 A Register Command A P 2 ．I C Read Protocol: 1 7 1 1 S Slave address R 8 1 1 A Register Command N P Slave ID (Read) Slave ID (Read) 1 2 3 4 5 6 7 S 6 S 5 S 4 S 3 S 2 S 1 S 0 8 9 1 2 3 4 5 6 7 8 9 SCL SDA S Slave address C C C C C C C C 7 6 5 4 3 2 1 0 R A Register Command N P 10/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 2 ．I C Read (Combined format) Protocol: 1 1 8 S Slave address W 1 7 A Register Address 1 1 7 A Sr Slave address Slave ID (Write) 1 1 R A Register Command N P 2 3 4 1 1 Slave ID (Read) Slave ID (Write) 1 8 5 6 Slave ID (Read) 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 …… SCL S 6 SDA S S 5 S 4 S 3 S 2 S 1 S 0 Slave address A A A A A A A A 7 6 5 4 3 2 1 0 W A Register Address A S 6 S 5 1 2 Sr S 4 S 3 S 2 S 1 S 0 6 7 Slave address 3 4 5 …… R A 8 9 …… C C C C C C C C 7 6 5 4 3 2 1 0 …… A Register Command N A Acknowledge (0 for an ACK) N Non-Acknowledge(1 for an NACK) S Start condition Sr Repeated Start condition P Stop condition W Write (0 for writing) R Read (1 for read) Slave-to-master P Master-to-Slave 2 I C Slave Address The 7 bits slave address for this sensor is 0x23H. A read/write bit should be appended to the slave address by the master device to properly communicate with the sensor. I2C Slave Address (0x29H) W/R Command Type Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Write 0 1 0 0 0 1 1 0 0x46H Read 0 1 0 0 0 1 1 1 0x47H value 11/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 Register Set Addr R/W Register Name Description Reset Value 0x80 R/W ALS_CONTR ALS operation mode control SW reset 0x00 0x81 R/W PS_CONTR PS operation mode control 0x00 0x82 R/W PS_LED PS LED setting 0x7F 0x83 R/W PS_N_PULSES PS number of pulses 0x01 0x84 R/W PS_MEAS_RATE PS measurement rate in active mode 0x02 0x85 R/W ALS_MEAS_RATE ALS measurement rate in active mode 0x03 0x86 R PART_ID Part Number ID and Revision ID 0x92 0x87 R MANUFAC_ID Manufacturer ID 0x05 0x88 R ALS_DATA_CH1_0 ALS measurement CH1 data, lower byte 0x00 0x89 R ALS_DATA_CH1_1 ALS measurement CH1 data, upper byte 0x00 0x8A R ALS_DATA_CH0_0 ALS measurement CH0 data, lower byte 0x00 0x8B R ALS_DATA_CH0_1 ALS measurement CH0 data, upper byte 0x00 0x8C R ALS_PS_STATUS ALS and PS new data status 0x00 0x8D R PS_DATA_0 PS measurement data, lower byte 0x00 0x8E R PS_DATA_1 PS measurement data, upper byte 0x00 0x8F R/W INTERRUPT Interrupt settings 0x00 0x90 R/W PS_THRES_UP_0 PS interrupt upper threshold, lower byte 0xFF 0x91 R/W PS_THRES_UP_1 PS interrupt upper threshold, upper byte 0x07 0x92 R/W PS_THRES_LOW_0 PS interrupt lower threshold, lower byte 0x00 0x93 R/W PS_THRES_LOW_1 PS interrupt lower threshold, upper byte 0x00 0x94 R/W PS_OFFSET_1 PS offset, upper byte 0x00 0x95 R/W PS_OFFSET_0 PS offset, lower byte 0x00 0x97 R/W ALS_THRES_UP_0 ALS interrupt upper threshold, lower byte 0xFF 0x98 R/W ALS_THRES_UP_1 ALS interrupt upper threshold, upper byte 0xFF 0x99 R/W ALS_THRES_LOW_0 ALS interrupt lower threshold, lower byte 0x00 0x9A R/W ALS_THRES_LOW_1 ALS interrupt lower threshold, upper byte 0x00 0x9E R/W INTERRUPT PERSIST ALS / PS Interrupt persist setting 0x00 Notes: 1) When reading ALS data registers, read sequence should always be from lower address to higher address (E.g. For ALS data, Ch1 data should be read first followed by Ch0 data. Read sequence should be 0x88, 0x89, 0x8A, 0x8B. When 0x8B is read, all four ALS data registers will be populated with new set of data). 2) When setting of INTERRUPT register (addr 0x8F) is necessary, it should be done before the device is in Active mode. 12/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 ALS_CONTR Register (0x80) The ALS_CONTR register controls the ALS Gain setting, ALS operation modes and software (SW) reset for the sensor. 2 The ALS sensor can be set to either standby mode or active mode. At either of these modes, the I C circuitry is always active. The default mode after power up is standby mode. During standby mode, there is no ALS measurement performed 2 but I C communication is allowed to enable read/write to all the registers. 0x80 ALS_CONTR (default = 0x00) B7 B6 B5 B4 Reserved Bits Default Type Reserved 7:5 000 -- SW reset ALS mode 4:2 1 0 000 0 0 B2 ALS Gain Field ALS Gain B3 B1 B0 SW Reset ALS Mode Description -- MUST write to 000 (default) 000 Gain 1X  1 lux to 64k lux (default) 001 Gain 2X  0.5 lux to 32k lux 010 Gain 4X  0.25 lux to 16k lux 011 Gain 8X  0.125 lux to 8k lux 100 Reserved 101 Reserved 110 Gain 48X  0.02 lux to 1.3k lux 111 Gain 96X  0.01 lux to 600 lux RW 0 Initial start-up procedure is NOT started (default) 1 Initial start-up procedure is started, bit has default value of 0 after start-up 0 Stand-by mode (default) 1 Active mode RW RW 13/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 PS_CONTR Register (0x81) The PS_CONTR register controls the PS operation modes. The PS sensor can be set to either standby mode or active 2 mode. At either of these modes, the I C circuitry is always active. The default mode after power up is standby mode. During 2 standby mode, there is no PS measurement performed but I C communication is allowed to enable read/write to all the registers. PS Saturation Indicator Enable bit is used for enabling the saturation indicator in Bit 7 of PS_DATA register (0x8E). 0x81 PS_CONTR (default = 0x00) B7 B6 B5 B4 PS Saturation Indicator Enable Reserved Field Bits Default Type Reserved 7:6 00 -- PS Saturation Indicator Enable 5 0 RW Reserved 4:2 000 -- B3 B2 Reserved B1 B0 PS Mode Description -- MUST write to 00 0 Saturation indicator disable 1 Saturation indicator enable -- Must be 0 00 Stand-by mode (default) 01 PS Mode 1:0 00 RW 10 Active mode 11 14/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 PS_LED Register (0x82) The PS_LED register controls the LED pulse modulation frequency, LED current duty cycle and LED peak current. 0x82 PS_LED (default = 0x7F) B7 B6 B5 B4 LED Pulse Frequency Field LED Pulse Modulation Frequency LED Duty Cycle LED Current Bits 7:5 4:3 2:0 Default 011 11 111 Type B3 B2 LED Duty Cycle B1 B0 LED Peak Current Description 000 LED pulse period = 30kHz 001 LED pulse period = 40kHz 010 LED pulse period = 50kHz 011 LED pulse period = 60kHz (default) 100 LED pulse period = 70kHz 101 LED pulse period = 80kHz 110 LED pulse period = 90kHz 111 LED pulse period = 100kHz 00 DUTY = 25% 01 DUTY = 50% 10 DUTY = 75% 11 DUTY = 100% (default) RW RW RW 000 LED pulsed current level = 5mA 001 LED pulsed current level = 10mA 010 LED pulsed current level = 20mA 011 LED pulsed current level = 50mA 100 101 110 LED pulsed current level = 100mA (default) 111 15/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 PS_N_Pulses Register (0x83) The PS_N_Pulses register controls the number of LED pulses to be emitted. 0x83 PS_N_Pulses (default = 0x01) B7 B6 B5 B4 B3 Reserved Field Bits Default Type Reserved 7:4 0000 -- PS number of LED pulses 3:0 0001 RW B2 B1 B0 LED Pulse Count Description -- 0000 (default) 0000 RESERVED 0001 Number of pulses = 1 (default) 0010 Number of pulses = 2 0011 Number of pulses = 3 0100 Number of pulses = 4 0101 Number of pulses = 5 0110 Number of pulses = 6 0111 Number of pulses = 7 1000 Number of pulses = 8 1001 Number of pulses = 9 1010 Number of pulses = 10 1011 Number of pulses = 11 1100 Number of pulses = 12 1101 Number of pulses = 13 1110 Number of pulses = 14 1111 Number of pulses = 15 16/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 PS_MEAS_RATE Register (0x84) The PS_MEAS_RATE register controls the timing of the periodic measurements of the PS in active mode. PS Measurement Repeat Rate is the interval between PS_DATA registers update. 0x84 PS_MEAS_RATE (default = 0x02) B7 B6 B5 B4 B3 Reserved Field Bits Default Type Reserved 7:4 0000 -- PS measurement rate 3:0 0010 RW B2 B1 B0 PS Measurement Repeat Rate Description -- 0000 (default) 0000 50ms 0001 70ms 0010 100ms (default) 0011 200ms 0100 500ms 0101 1000ms 0110 0111 1XXX 2000ms 10ms 17/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 ALS_MEAS_RATE Register (0x85) The ALS_MEAS_RATE register controls the integration time and timing of the periodic measurement of the ALS in active mode. ALS Measurement Repeat Rate is the interval between ALS_DATA registers update. ALS Integration Time is the measurement time for each ALS cycle. ALS Measurement Repeat Rate must be set to be equal or larger than the ALS Integration Time. If ALS Measurement Repeat Rate is set to be smaller than ALS Integration Time, it will automatically be reset to be equal to ALS Integration Time by the IC internally. 0x85 ALS_MEAS_RATE (default = 0x03) B7 B6 B5 Reserved Bits Default Type Reserved 7:6 00 -- ALS measurement rate 5:3 2:0 B3 ALS Integration Time Field ALS integration time B4 000 011 B2 B1 B0 ALS Measurement Repeat Rate Description -- -- 000 100ms (default) 001 50ms 010 200ms 011 400ms 100 150ms 101 250ms 110 300ms 111 350ms 000 50ms 001 100ms 010 200ms 011 500ms (default) 100 1000ms RW RW 101 110 2000ms 111 18/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 PART_ID Register (0x86) (Read Only) The PART_ID register defines the part number and revision identification of the sensor. 0x86 PART_ID (default = 0x92) B7 B6 B5 B4 B3 Part Number ID B2 B1 B0 Revision ID Field Bits Default Type Description Part Number ID 7:4 1001 R Part ID 0x09H Revision ID 3:0 0010 R Revision ID 0x02H MANUFAC_ID Register (0x87) (Read Only) The MANUFAC_ID register defines the manufacturer identification of the sensor. 0x87 MANUFAC_ID (default = 0x05) B7 B6 B5 B4 B3 B2 B1 B0 Manufacturer ID Field Bits Default Type Manufacturer ID 7:0 00000101 R Description Manufacturer ID (0x05H) 19/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 ALS_DATA_CH1 Register (0x88 / 0x89) (Read Only) The ALS_DATA registers should be read as a group, with the lower address read back first (i.e. read 0x88 first, then read 0x89). These two registers should also be read before reading channel-0 data (from registers 0x8A, 0x8B). 2 2 When the I C read operation starts, all four ALS data registers are locked until the I C read operation of register 0x8B is completed. This will ensure that the data in the registers is from the same measurement even if an additional integration cycle ends during the read operation. New measurement data is stored into temporary registers and the ALS_DATA 2 registers are updated as soon as there is no on-going I C read operation. The ALS ADC channel-1 data is expressed as a 16-bit data spread over two registers. The ALS_DATA_CH1_0 and ALS_DATA_CH1_1 registers provide the lower and upper byte respectively. 0x88 ALS_DATA_CH1_0 (default = 0x00) B7 B6 B5 B4 B3 B2 B1 B0 B2 B1 B0 ALS Data Ch1 Low 0x89 ALS_DATA_CH1_1 (default = 0x00) B7 B6 B5 B4 B3 ALS Data Ch1 High Field Address Bits Default Type Description ALS Data Ch1 Low 0x88 7:0 00000000 R ALS ADC channel 1 lower byte data ALS Data Ch1 High 0x89 7:0 00000000 R ALS ADC channel 1 upper byte data 20/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 ALS_DATA_CH0 Register (0x8A / 0x8B) (Read Only) These two registers should be read after reading channel-1 data (from registers 0x88, 0x89). Lower address register should be read first (i.e. read 0x8A first, then read 0x8B). See ALS_DATA_CH1 register information above. The ALS ADC channel-0 data is expressed as a 16-bit data spread over two registers. The ALS_DATA_CH0_0 and ALS_DATA_CH0_1 registers provide the lower and upper byte respectively. 0x8A ALS_DATA_CH0_0 (default = 0x00) B7 B6 B5 B4 B3 B2 B1 B0 B2 B1 B0 ALS Data Ch0 Low 0x8B ALS_DATA_CH0_1 (default = 0x00) B7 B6 B5 B4 B3 ALS Data Ch0 High Field Address Bits Default Type Description ALS Data Ch0 Low 0x8A 7:0 00000000 R ALS ADC channel 0 lower byte data ALS Data Ch0 High 0x8B 7:0 00000000 R ALS ADC channel 0 upper byte data 21/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 ALS_ PS_STATUS Register (0x8C) (Read Only) The ALS_PS_STATUS register stores the information about ALS data status. New data means data has not been read yet. When the measurement is completed and data is written to the data register, the data status bit will be set to logic 1. When the data register is read, the data status bit will be set to logic 0. Interrupt status determines if the ALS interrupt criteria are met. It will check if the ALS measurement data is outside of the range defined by the upper and lower threshold limits. ALS Data Valid bit indicates the validity of the ALS data in Ch0 and Ch1. 0x8C ALS_PS_STATUS (default = 0x00) B7 B6 ALS Data Valid B5 ALS Gain Field Bits Default Type ALS Data Valid 7 0 R ALS Data Gain Range ALS interrupt status 6:4 3 B4 000 0 R R B3 B2 B1 B0 ALS Interrupt Status ALS Data Status PS Interrupt Status PS Data Status Description 0 ALS Data is Valid (default) 1 ALS Data is Invalid 000 ALS measured data in Gain 1X (default) 001 ALS measured data in Gain 2X 010 ALS measured data in Gain 4X 011 ALS measured data in Gain 8X 100 Invalid 101 Invalid 110 ALS measured data in Gain 48X 111 ALS measured data in Gain 96X 0 Interrupt signal INACTIVE (default) Interrupt signal ACTIVE ALS data status 2 PS Interrupt Status 1 PS Data Status 0 0 0 0 R R R 0 OLD data (data already read), (default) 1 NEW data (first time data is being read) 0 Interrupt signal INACTIVE (default) 1 Interrupt signal ACTIVE 0 OLD data (data already read), (default) 1 NEW data (first time data is being read) 22/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 PS_DATA_0 Register (0x8D / 0x8E) (Read Only) The PS ADC channel data are expressed as a 11-bit data spread over two registers. The PS_DATA_0 and PS_DATA_1 2 registers provide the lower and upper byte respectively. When the I C read operation starts, both the registers are locked 2 until the I C read operation is completed. This will ensure that the data in the registers is from the same measurement even if an additional integration cycle ends during the read operation. New measurement data is stored into temporary 2 registers and the PS_DATA registers are updated as soon as there is no on-going I C read operation. PS Saturation Flag is used for monitoring the internal IC saturation. It will be flagged when the IC has reached saturation and not able to perform any further PS measurement. The PS Saturation Indicator Enable bit in PS_CONTR Register (0x81) has to be enabled in order to use this feature. If it is not enable, the flag will always be indicated as 0. 0x8D PS_DATA_0 (default = 0x00) B7 B6 B5 B4 B3 B2 B1 B0 B2 B1 B0 PS Data Low 0x8E PS_DATA_1 (default = 0x00) B7 B6 B5 PS Saturation Flag B4 B3 Reserved PS Data High Field Address Bits Default Type PS Data, Low 0x8D 7:0 00000000 R PS Saturation Flag 0x8E 7 0 R Description -- PS ADC lower byte data 0 PS not saturated 1 PS saturated Reserved 0x8E 6:3 00000 -- -- -- PS Data, High 0x8E 2:0 000 R -- PS ADC upper byte data 23/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 INTERRUPT Register (0x8F) (Read Only) The INTERRUPT register controls the operation of the interrupt pin and functions. When the Interrupt Mode is set to 00, the INT output pin 2 is inactive / disabled and will not trigger any interrupt. However at this condition, the ALS_PS_STATUS register will still be updated. Note that when this register is to be set with values other than its default values, it should be set before device is in Active mode. 0x8F INTERRUPT (default = 0x00) B7 B6 B5 B4 B3 Interrupt Polarity Reserved Field Bits Default Type RESERVED 7:3 00000 -- Interrupt Polarity 2 0 RW Interrupt Mode 1:0 0 RW B2 B1 B0 Interrupt Mode Description -- Must write as 00000 0 INT pin is considered active when it is a logic 0 (default) 1 INT pin is considered active when it is a logic 1 00 Interrupt pin is INACTIVE / high impedance state (default) 01 Only PS measurement can trigger interrupt 10 Only ALS measurement can trigger interrupt 11 Both ALS and PS measurement can trigger interrupt 24/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 PS_THRES Register (0x90 / 0x91 / 0x92 / 0x93) The PS_THRES_UP and PS_THRES_LOW registers determines the upper and lower limit of the interrupt threshold value respectively. These two values form a range and the interrupt function compares if the measurement value in PS_DATA registers is inside or outside the range. The interrupt function is active if the measurement data is outside the range defined by the upper and lower limits. The data format for PS_THRES must be the same as PS_DATA registers. These registers must be applied dynamically to have hysteresis interruption. 0x90 PS_THRES_UP_0 (default = 0xFF) B7 B6 B5 B4 B3 B2 B1 B0 B2 B1 B0 PS Upper Threshold Low 0x91 PS_THRES_UP_1 (default = 0x07) B7 B6 B5 B4 B3 Reserved 0x92 PS Upper Threshold High PS_THRES_LOW_0 (default = 0x00) B7 B6 B5 B4 B3 B2 B1 B0 B1 B0 PS Lower Threshold Low 0x93 PS_THRES_LOW_1 (default = 0x00) B7 B6 B5 Reserved B4 B3 B2 PS Lower Threshold High 25/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 Field Address Bits Default Type Description 0x90 7:0 11111111 RW PS upper threshold lower byte data Reserved 0x91 7:3 00000 -- Reserved PS Upper Threshold High 0x91 2:0 111 RW PS upper threshold upper byte data PS lower threshold, Low 0x92 7:0 00000000 RW PS lower threshold lower byte data Reserved 0x93 7:3 00000 -- Reserved 0x93 2:0 000 RW PS lower threshold upper byte data PS Upper Threshold Low PS lower threshold High 26/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 PS_OFFSET Register (0x94 / 0x95) The PS_OFFSET register defines the offset compensation value for proximity offsets caused by device variations, optical crosstalk and other environment factors. This value will be used and cancelled from the original PS raw data such that the data in PS_DATA register (0x8D and 0x8E) are the compensated value. 0x94 PS_OFFSET_1 (default = 0x00) B7 B6 B5 B4 B3 B2 B0 PS Offset, Reserved 0x95 B1 High byte PS_OFFSET_0 (default = 0x00) B7 B6 B5 B4 B3 B2 B1 B0 PS Offset, Low byte 27/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 ALS_THRES Register (0x97 / 0x98 / 0x99 / 0x9A) The ALS_THRES_UP and ALS_THRES_LOW registers determines the upper and lower limit of the interrupt threshold value respectively. These two values form a range and the interrupt function compares if the measurement value in ALS_DATA registers is inside or outside the range. The interrupt function is active if the measurement data is outside the range defined by the upper and lower limits. The data format for ALS_THRES must be the same as ALS_DATA registers. 0x97 ALS_THRES_UP_0 (default = 0xFF) B7 B6 B5 B4 B3 B2 B1 B0 B1 B0 B1 B0 B1 B0 ALS Upper Threshold Low 0x98 ALS_THRES_UP_1 (default = 0xFF) B7 B6 B5 B4 B3 B2 ALS Upper Threshold High 0x99 ALS_THRES_LOW_0 (default = 0x00) B7 B6 B5 B4 B3 B2 ALS Lower Threshold Low 0x9A ALS_THRES_LOW_1 (default = 0x00) B7 B6 B5 B4 B3 B2 ALS Lower Threshold High 28/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 Field Address Bits Default Type Description ALS upper threshold Low 0x97 7:0 11111111 RW ALS upper threshold lower byte data ALS upper threshold High 0x98 7:0 11111111 RW ALS upper threshold upper byte data ALS lower threshold Low 0x99 7:0 00000000 RW ALS lower threshold lower byte data ALS lower threshold High 0x9A 7:0 00000000 RW ALS lower threshold upper byte data 29/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 INTERRUPT PERSIST Register (0x9E) The INTERRUPT PERSIST register controls the N number of times the measurement data is outside the range defined by the upper and lower threshold limits before asserting the interrupt. 0x9E INTERRUPT PERSIST (default = 0x00) B7 B6 B5 B4 B3 PS Persist Field PS Persist Bits 7:4 Default 0000 Type 3:0 0000 B1 B0 ALS Persist Description 0000 Every PS value out of threshold range (default) 0001 2 consecutive PS values out of threshold range RW …. ALS Persist B2 …. 1111 16 consecutive PS values out of threshold range 0000 Every ALS value out of threshold range (default) 0001 2 consecutive ALS values out of threshold range RW --1111 --16 consecutive ALS values out of threshold range 30/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 10. Device Operation (using Interrupt) Below flow diagram illustrates the LTR-553ALS operation involving the use of Thresholds and Interrupts. Device Power Up Set Interrupt/ Thresholds DPS Active DLS Active Wait for Interrupt No Interrupt MCU Actions Read DPS Data MCU Actions Interrupt DPS Interrup t Check Status Reg (0x8C) DLS Interrup t 31/40 Read DLS Data Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 11. Pseudo Codes Examples Control Registers // The Control Registers define the operating modes and gain settings of the ALS and PS of LTR-553. // Default settings are 0x00 for both registers (both in Standby mode). Slave_Addr = 0x23 // Enable ALS Register_Addr = 0x80 Command = 0x01 // Slave address of LTR-553 device // ALS_CONTR register // For Gain X1 // For Gain X2, Command = 0x05 // For Gain X4, Command = 0x09 // For Gain X8, Command = 0x0D // For Gain X48, Command = 0x19 // For Gain X96, Command = 0x1D WriteByte(Slave_Addr, Register_Addr, Command) // Enable PS Register_Addr = 0x81 Command = 0x03 // PS_CONTR register WriteByte(Slave_Addr, Register_Addr, Command) PS LED Registers // The PS LED Registers define the LED pulse modulation frequency, duty cycle and peak current. // Default setting is 0x7F (60kHz, 100%, 100mA). Slave_Addr = 0x23 // Slave address of LTR-553 device // Set LED Pulse Freq 30kHz (duty cycle 100%, peak curr 100mA) Register_Addr = 0x82 // PS_LED register Command = 0x1F // Pulse Freq = 30kHz, (duty cyc 100%, peak curr 100mA) // For Pulse Freq = 40kHz, (100%, 100mA), Command = 0x3F // For Pulse Freq = 50kHz, (100%, 100mA), Command = 0x5F // For Pulse Freq = 60kHz, (100%, 100mA), Command = 0x7F // For Pulse Freq = 70kHz, (100%, 100mA), Command = 0x9F // For Pulse Freq = 80kHz, (100%, 100mA), Command = 0xBF // For Pulse Freq = 90kHz, (100%, 100mA), Command = 0xDF // For Pulse Freq = 100kHz, (100%, 100mA), Command = 0xFF WriteByte(Slave_Addr, Register_Addr, Command) // Set LED Duty Cycle 25% (pulse freq 60kHz, peak curr 100mA) Register_Addr = 0x82 // PS_LED register Command = 0x67 // Duty Cycle = 25%, (pulse freq 60kHz, peak curr 100mA) // For Duty Cycle = 50%, (60kHz, 100mA), Command = 0x6F // For Duty Cycle = 75%, (60kHz, 100mA), Command = 0x77 // For Duty Cycle = 100%, (60kHz, 100mA), Command = 0x7F WriteByte(Slave_Addr, Register_Addr, Command) 32/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 // Set LED Peak Current 5mA (pulse freq 60kHz, duty cycle 100%) Register_Addr = 0x82 // PS_LED register Command = 0x78 // Peak Current = 5mA, (pulse freq 60kHz, duty cyc 100%) // For Peak Current = 10mA, (60kHz, 100%), Command = 0x79 // For Peak Current = 20mA, (60kHz, 100%), Command = 0x7A // For Peak Current = 50mA, (60kHz, 100%), Command = 0x7B WriteByte(Slave_Addr, Register_Addr, Command) PS Measurement Rate // The PS_MEAS_RATE register controls the PS measurement rate. // Default setting of the register is 0x02 (repeat rate 100ms) Slave_Addr = 0x23 // Set PS Repeat Rate 50ms Register_Addr = 0x84 Command = 0x00 // Slave address of LTR-553 device // PS_MEAS_RATE register // Meas rate = 50ms // For Meas rate = 500ms, Command = 0x04 WriteByte(Slave_Addr, Register_Addr, Command) ALS Measurement Rate // The ALS_MEAS_RATE register controls the ALS integration time and measurement rate. // Default setting of the register is 0x03 (integration time 100ms, repeat rate 500ms) Slave_Addr = 0x23 // Slave address of LTR-553 device // Set ALS Integration Time 200ms, Repeat Rate 200ms Register_Addr = 0x85 // ALS_MEAS_RATE register Command = 0x12 // Int time = 200ms, Meas rate = 200ms // For Int time = 400ms, Meas rate = 500ms, Command = 0x1B WriteByte(Slave_Addr, Register_Addr, Command) ALS Data Registers (Read Only) // The ALS Data Registers contain the ADC output data for the respective channel. // These registers should be read as a group, with the lower address being read first. Slave_Addr = 0x23 // Read back ALS_DATA_CH1 Register_Addr = 0x88 ReadByte(Slave_Addr, Register_Addr, Data0) Register_Addr = 0x89 ReadByte(Slave_Addr, Register_Addr, Data1) // Read back ALS_DATA_CH0 Register_Addr = 0x8A ReadByte(Slave_Addr, Register_Addr, Data2) Register_Addr = 0x8B ReadByte(Slave_Addr, Register_Addr, Data3) ALS_CH1_ADC_Data = (Data1 > 8 // To convert decimal 200 into two eight bytes register values Data0 = 200 & 0xFF WriteByte(Slave_Addr, ALS_Low_Threshold_Reg_0, Data0) WriteByte(Slave_Addr, ALS_Low_Threshold_Reg_1, Data1) PS Threshold Registers // The PS_THRES_UP and PS_THRES_LOW registers determines the upper and lower limit of the interrupt threshold value. // Following example illustrates the setting of the PS dynamic threshold with hysteresis interruption for // decimal value 1000 (for NEAR detection) and 500 (for FAR detection) Slave_Addr = 0x23 // Slave address of LTR-553 device //For NEAR detection (decimal 1000) PS_Upp_Threshold_Reg_0 = 0x90 // PS Upper Threshold Low Byte Register address PS_Upp_Threshold_Reg_1 = 0x91 // PS Upper Threshold High Byte Register address Data1 = 1000 >> 8 // To convert decimal 1000 into two eight bytes register values Data0 = 1000 & 0xFF WriteByte(Slave_Addr, PS_Upp_Threshold_Reg_0, Data0) WriteByte(Slave_Addr, PS_Upp_Threshold_Reg_1, Data1) PS_Low_Threshold_Reg_0 = 0x92 // PS Lower Threshold Low Byte Register address PS_Low_Threshold_Reg_1 = 0x93 // PS Lower Threshold High Byte Register address Data1 = 0 >> 8 // To convert decimal 0 into two eight bytes register values Data0 = 0 & 0xFF WriteByte(Slave_Addr, PS_Low_Threshold_Reg_0, Data0) WriteByte(Slave_Addr, PS_Low_Threshold_Reg_1, Data1) //For FAR detection (decimal 500) PS_Upp_Threshold_Reg_0 = 0x90 // PS Upper Threshold Low Byte Register address PS_Upp_Threshold_Reg_1 = 0x91 // PS Upper Threshold High Byte Register address Data1 = 2047 >> 8 // To convert decimal 2047 into two eight bytes register values Data0 = 2047 & 0xFF WriteByte(Slave_Addr, PS_Upp_Threshold_Reg_0, Data0) WriteByte(Slave_Addr, PS_Upp_Threshold_Reg_1, Data1) PS_Low_Threshold_Reg_0 = 0x92 // PS Lower Threshold Low Byte Register address PS_Low_Threshold_Reg_1 = 0x93 // PS Lower Threshold High Byte Register address Data1 = 500 >> 8 // To convert decimal 500 into two eight bytes register values Data0 = 500 & 0xFF WriteByte(Slave_Addr, PS_Low_Threshold_Reg_0, Data0) WriteByte(Slave_Addr, PS_Low_Threshold_Reg_1, Data1) 35/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 12. Recommended Leadfree Reflow Profile MAX 260C T - TEMPERATURE (°C) 255 R3 230 217 200 180 R2 R4 60 sec to 90 sec Above 217 C 150 R5 R1 120 80 25 0 P1 HEAT UP 100 50 150 P2 SOLDER PASTE DRY 200 P3 SOLDER REFLOW 250 P4 COOL DOWN 300 t-TIME (SECONDS) Process Zone Symbol T Maximum T/time or Duration Heat Up P1, R1 25C to 150C 3C/s Solder Paste Dry P2, R2 150C to 200C 100s to 180s P3, R3 200C to 260C 3C/s P3, R4 260C to 200C -6C/s P4, R5 200C to 25C -6C/s Time maintained above liquidus point , 217C > 217C 60s to 90s Peak Temperature 260C - Time within 5C of actual Peak Temperature > 255C 20s Time 25C to Peak Temperature 25C to 260C 8mins Solder Reflow Cool Down It is recommended to perform reflow soldering no more than twice. 36/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 13. Moisture Proof Packaging All LTR-553ALS-01 are shipped in moisture proof package. Once opened, moisture absorption begins. This part is compliant to JEDEC J-STD-033A Level 3. Time from Unsealing to Soldering After removal from the moisture barrier bag, the parts should be stored at the recommended storage conditions and soldered within seven days. When the moisture barrier bag is opened and the parts are exposed to the recommended storage conditions for more than seven days, the parts must be baked before reflow to prevent damage to the parts. Recommended Storage Conditions Storage Temperature 10C to 30C Relative Humidity Below 60% RH Baking Conditions Package Temperature Time In Reels 60C 48 hours In Bulk 100C 4 hours Baking should only be done once. 37/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 14. Recommended Land Pattern and Metal Stencil Aperture Stencil Aperture Metal Stencil for Solder Land Pattern Paste Printing PCB A Recommended Land Pattern Note: All dimensions are in millimeters 38/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 Recommended Metal Stencil Aperture It is recommended that the metal stencil used for solder paste printing has a thickness (t) of 0.11mm (0.004 inches / 4 mils) or 0.127mm (0.005 inches / 5 mils). The stencil aperture opening is recommended to be 0.72mm x 0.60mm which has the same dimension as the land pattern. This is to ensure adequate printed solder paste volume and yet no shorting. Aperture Opening t 3.6 2.0 0 3 Note: 1. All dimensions are in millimeters 39/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-553ALS-01 15. Package Dimension for Tape and Reel Notes: 1. All dimensions are in millimeters (inches) 2. Empty component pockets sealed with top cover tape 3. 13 inch reel - 8000 pieces per reel 4. In accordance with ANSI/EIA 481-1-A-1994 specifications 40/40 Part No. : LTR-553ALS-01 BNS-OD-FC002/A4