VCNL4020C-GS18

VCNL4020C www.vishay.com Vishay Semiconductors High Resolution Digital Biosensor for Wearable Applications With I2C Interface FEATURES • Package type: surface-mount • Package form: SMD • Dimensions (L x W x H in mm): 4.90 x 2.40 x 0.83 • Integrated modules: infrared emitter (IRED), ambient light sensor (ALS), photo diode (PD), and signal conditioning IC • Interrupt function • Supply voltage range VDD: 2.5 V to 3.6 V • Supply voltage range IR anode: 2.5 V to 5 V • Communication via I2C interface IR anode 1 10 IR cathode • I2C bus H-level range: 1.7 V to 5 V SDA 2 9 GND INT 3 • Floor life: 72 h, MSL 4, according to J-STD-020 8 GND 7 nc 6 nc SCL 4 VDD 5 • Low stand by current consumption: 1.5 μA • Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 22620 OPTICAL BIOSENSORS FUNCTION DESCRIPTION The VCNL4020C is a fully integrated biosensor and ambient light sensor. Fully integrated means that the infrared emitter is included in the package. It has 16 bit resolution. It includes a signal processing IC and features standard I2C communication interface. It features an interrupt function. • Built-in infrared emitter and broader sensitivity photodiode allows to also work with green and red LEDs • 16 bit effective resolution ensures excellent cross talk immunity • Programmable LED drive current from 10 mA to 200 mA in 10 mA steps • Excellent ambient light suppression through signal modulation APPLICATIONS • Wearables • Health monitoring AMBIENT LIGHT FUNCTION • Pulse oximetry • Built-in ambient light photo-pin-diode close-to-human-eye sensitivity with • 16 bit dynamic range from 0.25 lx to 16 klx • 100 Hz and 120 Hz flicker noise rejection PRODUCT SUMMARY PART NUMBER OPERATING VOLTAGE RANGE (V) I2C BUS VOLTAGE RANGE (V) LED PULSE CURRENT (1) (mA) AMBIENT LIGHT RANGE (lx) SPECTRAL BANDWIDTH RANGE λ0.5 (nm) OUTPUT CODE ADC RESOLUTION BIOSENSOR / AMBIENT LIGHT SENSOR 2.5 to 3.6 1.7 to 5 10 to 200 0.25 to 16 383 550 to 970 16 bit, I2C 16 bit / 16 bit VCNL4020C Note (1) Adjustable through I2C interface Rev. 1.1, 20-Mar-18 Document Number: 84350 1 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors ORDERING INFORMATION ORDERING CODE VOLUME (1) PACKAGING VCNL4020C-GS08 Tape and reel VCNL4020C-GS18 REMARKS MOQ: 3300 pcs 4.90 mm x 2.40 mm x 0.83 mm MOQ: 13 000 pcs Note (1) MOQ: minimum order quantity ABSOLUTE MAXIMUM RATINGS (Tamb = 25 °C, unless otherwise specified) PARAMETER SYMBOL MIN. MAX. Supply voltage TEST CONDITION VDD -0.3 5.5 V Operation temperature range Tamb -25 +85 °C Tstg -25 +85 °C Ptot - 50 mW Tj - 100 °C Storage temperature range Total power dissipation Tamb ≤ 25 °C Junction temperature UNIT BASIC CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified) PARAMETER MIN. TYP. MAX. UNIT Supply voltage VDD TEST CONDITION SYMBOL 2.5 - 3.6 V Supply voltage IR anode 2.5 - 5 V I2C bus H-level range 1.7 - 5 V INT H-level range 1.7 - 5 V INT low voltage 3 mA sink current - - 0.4 V Current consumption Standby current, no LED-operation - 1.5 2 μA 2 measurements per second, LED current 20 mA - 5 - μA 250 measurements per second, LED current 20 mA - 520 - μA 2 measurements per second, LED current 200 mA - 35 - μA 250 measurements per second, LED current 200 mA - 4 - mA 2 measurements per second averaging = 1 - 2.5 - μA 8 measurements per second averaging = 1 - 10 - μA 2 measurements per second averaging = 64 - 160 - μA 8 measurements per second averaging = 64 - 640 - μA Digital resolution (LSB count ) - 0.25 - lx EV = 100 lx averaging = 64 - 400 - counts - - 3400 kHz Current consumption pulse mode incl. LED (averaged) Current consumption ambient light mode Ambient light resolution Ambient light output I2C clock rate range Rev. 1.1, 20-Mar-18 fSCL Document Number: 84350 2 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors CIRCUIT BLOCK DIAGRAM 1 SDA 2 INT 3 SCL 4 VDD 5 30 mm x 30 mm 10 IR cathode IRED PD 9 GND 8 GND 7 nc 6 nc Kodak gray card (18 % reflectivity) d = 20 mm IR anode TEST CIRCUIT Ambi VCNL4020C ASIC PD VCNL4020C IRED PD Note • nc must not be electrically connected Pads 6 and 7 are only considered as solder pads BASIC CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified) 100 000 LED current 200 mA 2.2 10 000 2.0 VDD = 3.6 V VDD = 3.5 V VDD = 3.3 V VDD = 3.1 V 1.8 Proximity Value (cts) IDD - Supply Current Idle Mode (μA) 2.4 VDD = 2.5 V VDD = 2.7 V VDD = 2.9 V 1.6 1.4 LED current 100 mA 100 LED current 20 mA 10 1.2 Media: Kodak gray card Mod. frequency = 390 kHz 1.0 - 50 - 30 - 10 1 10 30 50 70 90 110 0.1 10 1 100 Tamb - Ambient Temperature (°C) Distance to Reflecting Card (mm) Fig. 1 - Idle Current vs. Ambient Temperature Fig. 3 - Proximity Value vs. Distance 22301 250 IIRED - Forward Current IRED (mA) 2.4 IDD - Supply Current Idle Mode (μA) 1000 100 °C 2.2 2.0 80 °C 1.8 55 °C 1.6 25 °C 1.4 -10 °C 1.2 -40 °C VIRED = 2.5 V 200 mA 200 160 mA 150 2.4 2.6 2.8 3.0 3.2 3.4 VDD - Supply Voltage (V) Fig. 2 - Idle Current vs. VDD Rev. 1.1, 20-Mar-18 3.6 140 mA 120 mA 100 mA 100 80 mA 60 mA 50 1.0 22302 180 mA 40 mA 20 mA 0 -60 3.8 22304 -20 20 60 100 140 Tamb - Ambient Temperature (°C) Fig. 4 - Forward Current vs. Temperature Document Number: 84350 3 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors 0° Srel - Relative Sensitivity 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 1.0 0.9 40° 0.8 0.7 60° 0.6 ϕ - Angular Displacement 1.0 80° 0.1 0 750 800 850 900 950 1000 0.5 0.4 0.3 0.2 0.1 0 1050 λ - Wavelength (nm) 22305 22308 Fig. 8 - Relative Radiant Sensitivity vs. Angular Displacement (Proximity Sensor) Fig. 5 - Relative Radiant Intensity vs. Wavelength 20° 100 000 1.0 0.9 40° 0.8 0.7 60° 0.6 ϕ - Angular Displacement 0° Irel - Relative Radiant Intensity 20° IF = 100 mA Ambient Light Signal (cts) Ie, rel - Relative Radiant Intensity 1.1 10 000 1000 100 10 80° 1 0.1 0.5 0.4 0.3 0.2 0.1 0 1 Fig. 6 - Relative Radiant Intensity vs. Angular Displacement 100 1000 10 000 Fig. 9 - Ambient Light Value vs. Illuminance 1.1 S(λ)rel - Relative Spectral Sensitivity S(λ)rel - Relative Spectral Sensitivity 10 EV - Illuminance (lx) 22306 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 400 500 600 700 800 900 1000 1100 λ - Wavelength (nm) Fig. 7 - Relative Spectral Sensitivity vs. Wavelength (Biosensor) Rev. 1.1, 20-Mar-18 1.0 Human eye VCNL4020C 0.8 0.6 0.4 0.2 0 400 500 600 700 800 900 1000 1100 λ - Wavelength (nm) Fig. 10 - Relative Spectral Sensitivity vs. Wavelength (Ambient Light Sensor) Document Number: 84350 4 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors 20° 1.0 0.9 40° Vertical Horizontal 0.8 0.7 60° 0.6 ϕ - Angular Displacement Srel - Relative Sensitivity 0° 80° 0.5 0.4 0.3 0.2 0.1 0 22311 Fig. 11 - Relative Radiant Sensitivity vs. Angular Displacement (Ambient Light Sensor) APPLICATION INFORMATION The digital biosensor VCNL4020C needs just one decoupling-C at VDD if connected to a regulated power supply. IR cathode needs no external connection as the connection to the driver is done internally, but this allows also for adding external LEDs / IREDs to the driver. 1. Application Circuit VSMD66694 (2) IR (3) C1 2.5 V to 3.6 V (4) RED 2.5 V to 5.0 V (1) 2.5 V to 3.6 V C2 R2 R3 R4 22 μF 100 nF IR anode (1) IR cathode (10) R1 10R 1.7 V to 5.0 V C4 C3 IR anode (1) VDD (5) C1 10 μF 100 nF VCNL4020C INT (3) GND (8, 9) SCL (4) SDA (2) Host Micro Controller VDD (5) 470 nF VCNL4020C GPIO I2C bus clock SCL I2C bus data SDA INT (3) GND (8, 9) SCL (4) SDA (2) Fig. 12 - Application Circuit (x) = Pin Number Note • The interrupt pin is an open drain output. The needed pull-up resistor may be connected to the same supply voltage as the application controller and the pull-up resistors at SDA / SCL. Proposed value R2 should be >1 kΩ , e.g. 10 kΩ to 100 kΩ. Proposed value for R3 and R4, e.g. 2.2 kΩ to 4.7 kΩ, depend also on the I2C bus speed. For detailed description about set-up and use of the interrupt as well as more application related information see AN: “Designing VCNL4020C into an Application”. Rev. 1.1, 20-Mar-18 Document Number: 84350 5 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors 2. I2C Interface The VCNL4020C contains seventeen 8 bit registers for operation control, parameter setup and result buffering. All registers are accessible via I2C communication. Figure 13 shows the basic I2C communication with VCNL4020C. The built in I2C interface is compatible with all I2C modes (standard, fast and high speed). I2C H-level range = 1.7 V to 5 V. Please refer to the I2C specification from NXP for details. Send byte S Write command to VCNL4020C Slave address Receive byte Wr A Register address Data byte A A P Read data from VCNL4020C S Slave address Wr A Register address A P S Slave address Rd A Data byte A P S = start condition P = stop condition A = acknowledge Host action VCNL4020C response Fig. 13 - Send Byte/Receive Byte Protocol Device Address Register Addresses The VCNL4020C has a fix slave address for the host programming and accessing selection. The predefined 7 bit I2C bus address is set to 0010 011 = 13h. The least significant bit (LSB) defines read or write mode. Accordingly the bus address is set to 0010 011x = 26h for write, 27h for read. VCNL4020C has seventeen user accessible 8 bit registers. The register addresses are 80h (register #0) to 90h (register #16). REGISTER FUNCTIONS Register #0 Command Register Register address = 80h The register #0 is for starting ambient light or biosensor measurements. This register contains 2 flag bits for data ready indication. TABLE 1 - COMMAND REGISTER #0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 config_lock als_data_rdy bs_data_rdy als_od bs_od als_en bs_en selftimed_en Description config_lock Read only bit. Value = 1 als_data_rdy Read only bit. Value = 1 when ambient light measurement data is available in the result registers. This bit will be reset when one of the corresponding result registers (reg #5, reg #6) is read. bs_data_rdy Read only bit. Value = 1 when biosensor measurement data is available in the result registers. This bit will be reset when one of the corresponding result registers (reg #7, reg #8) is read. als_od R/W bit. Starts a single on-demand measurement for ambient light. If averaging is enabled, starts a sequence of readings and stores the averaged result. Result is available at the end of conversion for reading in the registers #5(HB) and #6(LB). bs_od R/W bit. Starts a single on-demand measurement for biosensor. Result is available at the end of conversion for reading in the registers #7(HB) and #8(LB). als_en R/W bit. Enables periodic als measurement bs_en R/W bit. Enables periodic biosensor measurement selftimed_en R/W bit. Enables state machine and LP oscillator for self timed measurements; no measurement is performed until the corresponding bit is set Note • With setting bit 3 and bit 4 at the same write command, a simultaneously measurement of ambient light and biosensor is done. Beside als_en and / or bs_en first selftimed_en needs to be set. On-demand measurement modes are disabled if selftimed_en bit is set. For the selftimed_en mode changes in reading rates (reg #4 and reg #2) can be made only when b0 (selftimed_en bit) = 0. For the als_od mode changes to the reg #4 can be made only when b4 (als_od bit) = 0; this is to avoid synchronization problems and undefined states between the clock domains. In effect this means that it is only reasonable to change rates while no selftimed conversion is ongoing. Rev. 1.1, 20-Mar-18 Document Number: 84350 6 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors Register #1 Product ID Revision Register Register address = 81h. This register contains information about product ID and product revision. Register data value of current revision = 21h. TABLE 2 - PRODUCT ID REVISION REGISTER #1 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Product ID Bit 1 Bit 0 Bit 1 Bit 0 Revision ID Description Product ID Read only bits. Value = 2 Revision ID Read only bits. Value = 1 Register #2 Rate of Biosensor Measurement Register address = 82h. TABLE 3 - BIOSENSOR RATE REGISTER #2 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Rate of biosensor Measurement (no. of measurements per second) n/a Description Biosensor rate R/W bits. 000 - 1.95 measurements/s (DEFAULT) 001 - 3.90625 measurements/s 010 - 7.8125 measurements/s 011 - 16.625 measurements/s 100 - 31.25 measurements/s 101 - 62.5 measurements/s 110 - 125 measurements/s 111 - 250 measurements/s Note • If self_timed measurement is running, any new value written in this register will not be taken over until the mode is actualy cycled. Register #3 LED Current Setting for Biosensor Mode Register address = 83h. This register is to set the LED current value for biosensor measurement. The value is adjustable in steps of 10 mA from 0 mA to 200 mA. This register also contains information about the used device fuse program ID. TABLE 4 - LED CURRENT REGISTER #3 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Fuse prog ID LED current value Fuse prog ID Read only bits. Information about fuse program revision used for initial setup/calibration of the device. Bit 0 Description LED current value Rev. 1.1, 20-Mar-18 R/W bits. LED current = Value (dec.) x 10 mA. Valid Range = 0 to 20d. e.g. 0 = 0 mA, 1 = 10 mA, …., 20 = 200 mA (2 = 20 mA = DEFAULT) LED Current is limited to 200 mA for values higher as 20d. Document Number: 84350 7 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors Register #4 Ambient Light Parameter Register Register address = 84h. TABLE 5 - AMBIENT LIGHT PARAMETER REGISTER #4 Bit 7 Bit 6 Cont. conv. mode Bit 5 Bit 4 Bit 3 Auto offset compensation als_rate Bit 2 Bit 1 Bit 0 Averaging function (number of measurements per run) Description Cont. conversion mode Ambient light measurement rate Auto offset compensation Averaging function R/W bit. Continuous conversion mode. Enable = 1; Disable = 0 = DEFAULT This function can be used for performing faster ambient light measurements. This mode should only be used with ambient light on-demand measurements. Do not use with self-timed mode. Please refer to the application information chapter 3.3 for details about this function. R/W bits. Ambient light measurement rate 000 - 1 samples/s 001 - 2 samples/s = DEFAULT 010 - 3 samples/s 011 - 4 samples/s 100 - 5 samples/s 101 - 6 samples/s 110 - 8 samples/s 111 - 10 samples/s R/W bit. Automatic offset compensation. Enable = 1 = DEFAULT; Disable = 0 In order to compensate a technology, package or temperature related drift of the ambient light values there is a built in automatic offset compensation function. With active auto offset compensation the offset value is measured before each ambient light measurement and subtracted automatically from actual reading. R/W bits. Averaging function. Bit values sets the number of single conversions done during one measurement cycle. Result is the average value of all conversions. Number of conversions = 2decimal_value e.g. 0 = 1 conv., 1 = 2 conv, 2 = 4 conv., ….7 = 128 conv. DEFAULT = 32 conv. (bit 2 to bit 0: 101) Note • If self_timed measurement is running, any new value written in this register will not be taken over until the mode is actualy cycled. Register #5 and #6 Ambient Light Result Register Register address = 85h and 86h. These registers are the result registers for ambient light measurement readings. The result is a 16 bit value. The high byte is stored in register #5 and the low byte in register #6. TABLE 6 - AMBIENT LIGHT RESULT REGISTER #5 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 1 Bit 0 Description Read only bits. High byte (15:8) of ambient light measurement result TABLE 7 - AMBIENT LIGHT RESULT REGISTER #6 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Description Read only bits. Low byte (7:0) of ambient light measurement result Rev. 1.1, 20-Mar-18 Document Number: 84350 8 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors Register #7 and #8 Biosensor Measurement Result Register Register address = 87h and 88h. These registers are the result registers for biosensor measurement readings. The result is a 16 bit value. The high byte is stored in register #7 and the low byte in register #8. TABLE 8 - BIOSENSOR RESULT REGISTER #7 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 1 Bit 0 Description Read only bits. High byte (15:8) of biosensor measurement result TABLE 9 - BIOSENSOR RESULT REGISTER #8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Description Read only bits. Low byte (7:0) of biosensor measurement result Register #9 Interrupt Control Register Register address = 89h. TABLE 10 - INTERRUPT CONTROL REGISTER #9 Bit 7 Bit 6 Int count exceed Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 n/a INT_BS_ ready_EN INT_ALS_ ready_EN INT_THRES_EN INT_THRES_ SEL Description Int count exceed INT_BS_ready_EN INT_ALS_ ready_EN R/W bits. These bits contain the number of consecutive measurements needed above/below the threshold 000 - 1 count = DEFAULT 001 - 2 count 010 - 4 count 011 - 8 count 100 -16 count 101 - 32 count 110 - 64 count 111 - 128 count R/W bit. Enables interrupt generation at biosensor data ready R/W bit. Enables interrupt generation at ambient data ready INT_THRES_EN R/W bit. Enables interrupt generation when high or low threshold is exceeded INT_THRES_SEL R/W bit. If 0: thresholds are applied to biosensor measurements If 1: thresholds are applied to als measurements Rev. 1.1, 20-Mar-18 Document Number: 84350 9 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors Register #10 and #11 Low Threshold Register address = 8Ah and 8Bh. These registers contain the low threshold value. The value is a 16 bit word. The high byte is stored in register #10 and the low byte in register #11. TABLE 11 - LOW THRESHOLD REGISTER #10 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 2 Bit 1 Bit 0 Description R/W bits. High byte (15:8) of low threshold value TABLE 12 - LOW THRESHOLD REGISTER #11 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Description R/W bits. Low byte (7:0) of low threshold value Register #12 and #13 High Threshold Register address = 8Ch and 8Dh. These registers contain the high threshold value. The value is a 16 bit word. The high byte is stored in register #12 and the low byte in register #13. TABLE 13 - HIGH THRESHOLD REGISTER #12 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 1 Bit 0 Description R/W bits. High byte (15:8) of high threshold value TABLE 14 - HIGH THRESHOLD REGISTER #13 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Description R/W bits. Low byte (7:0) of high threshold value Register #14 Interrupt Status Register Register address = 8Eh. This register contains information about the interrupt status for either biosensor or ALS function and indicates if high or low going threshold exceeded. TABLE 15 - INTERRUPT STATUS REGISTER #14 Bit 7 Bit 6 Bit 5 n/a Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 int_bs_ready int_als_ready int_th_low int_th_hi Description int_bs_ready R/W bit. Indicates a generated interrupt for biosensor int_als_ready R/W bit. Indicates a generated interrupt for als int_th_low R/W bit. Indicates a low threshold exceed int_th_hi R/W bit. Indicates a high threshold exceed Note • Once an interrupt is generated the corresponding status bit goes to 1 and stays there unless it is cleared by writing a 1 in the corresponding bit. The int pad will be pulled down while at least one of the status bit is 1. Rev. 1.1, 20-Mar-18 Document Number: 84350 10 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors Register #15 Biosensor Modulator Timing Adjustment Register address = 8Fh. TABLE 16 - BIOSENSOR MODULATOR TIMING ADJUSTMENT #15 Bit 7 Bit 6 Bit 5 Bit 4 Modulation delay time Bit 3 Bit 2 Biosensor frequency Bit 1 Bit 0 Modulation dead time Description Modulation delay time R/W bits. Setting a delay time between LED signal and detectors input signal evaluation. This function is for compensation of delays from LED and photo diode. Also in respect to the possibility for setting different proximity signal frequency. Correct adjustment is optimizing measurement signal level. (DEFAULT = 0) Biosensor frequency R/W bits. Setting the biosensor test signal frequency The biosensor measurement is using a square signal as measurement signal. Four different values are possible: 00 = 390.625 kHz (DEFAULT) 01 = 781.25 kHz 10 = 1.5625 MHz 11 = 3.125 MHz Modulation dead time R/W bits. Setting a dead time in evaluation of LED signal at the slopes of the signal. (DEFAULT = 1) This function is for reducing of possible disturbance effects. This function is reducing signal level and should be used carefully. Note • The settings for best performance will be provided by Vishay. With first samples this is evaluated to: Delay time = 0; dead time = 1 and BS frequency = 00. With that register #15 should be programmed with 1 (= default value). Register #16 Ambient IR Light Level Register Register address = 90h. This register is not intended to be used by customer. 3. IMPORTANT APPLICATION HINTS AND EXAMPLES 3.1 Receiver standby mode In standby mode the receiver has the lowest current consumption of about 1.5 μA. In this mode only the I2C interface is active. This is always valid, when there are no measurement demands executed. Also the current sink for the LED is inactive, so there is no need for changing register #3 (LED current). 3.2 Data Read In order to get a certain register value, the register has to be addressed without data like shown in the following scheme. After this register addressing, the data from the addressed register is written after a subsequent read command. Receive byte Read data from VCNL4020C S Slave address Wr A Register address A P S Slave address Rd A Data byte A P S = start condition P = stop condition A = acknowledge Host action VCNL4020C response Fig. 14 - Send Byte / Receive Byte Protocol The stop condition between these write and read sequences is not mandatory. It works also with a repeated start condition. Note • For reading out 2 (or more) subsequent registers like the result registers, it is not necessary to address each of the registers separately. After one read command the internal register counter is increased automatically and any subsequent read command is accessing the next register. Rev. 1.1, 20-Mar-18 Document Number: 84350 11 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors Example: read register “Ambient Light Result Register” #5 and #6: Addressing:command: 26h, 85h (VCNL4020C_I2C_Bus_Write_Adr., Ambient Light Result Register #5 [85]) Read register #5:command: 27h, data (VCNL4020C_I2C_Bus_Read_Adr., {High Byte Data of Ambient Light Result register #5 [85])} Read register #6:command: 27h, data (VCNL4020C_I2C_Bus_Read_Adr., {Low Byte Data of Ambient Light Result register #6 [86])} 3.3 Continuous Conversion Mode in Ambient Light Measurement In the following is a detail description of the function “continuous conversion” (bit 7 of register #4) Standard mode (bit 7 of reg #4 = 0): In standard mode the ambient light measurement is done during a fixed time frame of 100 ms. The single measurement itself takes actually only appr. 300 μs. The following figures show examples of this measurement timing in standard mode using averaging function 2 and 8 as examples for illustration (possible values up to 128). Start Start 50 ms 12.5 ms 100 ms 100 ms 22316 22315 Fig. 15 - Ambient Light Measurement with Averaging = 2; Final Measurement Result = Average of these 2 Measurements Fig. 16 - Ambient Light Measurement with Averaging = 8; Final Measurement Result = Average of these 8 Measurements Note • ≥ Independent of setting of averaging the result is available only after 100 ms. Continuous conversion mode (bit 7 of register #4 = 1): In continuous conversion mode the single measurements are done directly subsequent after each other. See following examples in figure 17 and 18 Start Start 460 μs 460 μs 1.5 ms 4.2 ms 22317 22318 Fig. 17 - Ambient Light Measurement with Averaging = 2; using Continuous Conversion Mode Rev. 1.1, 20-Mar-18 Fig. 18 - Ambient Light Measurement with Averaging = 8; using Continuous Conversion Mode Document Number: 84350 12 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors PACKAGE DIMENSIONS in millimeters 4.15 VDD SCL INT Cathode PD Cathode PD VDD SCL VSS INT SDA Anode Emitter 0.83 0.15 technical drawings according to DIN specifications Proposed PCB Footprint (4.9) 0.69 1.75 0.83 Not indicated tolerances ± 0.1 0.2 0.2 0.45 0.4 0.8 Drawing-No.: 6.550-5319 (2.4) 1.27 4.9 1.1 0.4 0.28 1.5 2.4 0.37 0.4 0.25 0.8 2.03 Rev. 1.1, 20-Mar-18 VSS Anode Emitter Cathode Emitter Pinning Top view Cathode Emitter 0.78 0.73 0.95 0.98 1.49 1.62 0.24 0.3 0.65 0.55 0.685 SDA Pinning Bottom view 4x0.685=2.74 4x 0.685=2.74 Document Number: 84350 13 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors TAPE AND REEL DIMENSIONS in millimeters Rev. 1.1, 20-Mar-18 Document Number: 84350 14 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 VCNL4020C www.vishay.com Vishay Semiconductors SOLDER PROFILE DRYPACK Devices are packed in moisture barrier bags (MBB) to prevent the products from moisture absorption during transportation and storage. Each bag contains a desiccant. Axis Title 10000 300 Max. 260 °C 255 °C 240 °C 217 °C 245 °C FLOOR LIFE 1000 200 Max. 30 s 1st line 2nd line 2nd line Temperature (°C) 250 150 Max. 120 s 100 Max. 100 s Max. ramp down 6 °C/s 100 Floor life (time between soldering and removing from MBB) must not exceed the time indicated on MBB label: Floor life: 72 h Conditions: Tamb < 30 °C, RH < 60 % Moisture sensitivity level 4, according to J-STD-020. Max. ramp up 3 °C/s 50 DRYING 10 0 0 50 100 150 200 250 300 Time (s) 19841 Fig. 19 - Lead (Pb)-free Reflow Solder Profile According to J-STD-020 Rev. 1.1, 20-Mar-18 In case of moisture absorption devices should be baked before soldering. Conditions see J-STD-020 or label. Devices taped on reel dry using recommended conditions 192 h at 40 °C (+ 5 °C), RH < 5 %. Document Number: 84350 15 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. 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