PYQ 1548/7660

low power DigiPyro TM Infrared Sensing Solutions Product Specification PYQ 1548 / 7660 Features • Integrated digitization • Motion detection unit with Interrupt function • Low-power consumption of only 3 µA at 1.8 V. • Smaller ceramic pyroelectric elements • Quad detector with 0.8 × 0.8 mm2 elements • 140◦ field-of-view • TO-5 metal housing for high EMI immunity Low Power Small Quad Element Pyro The PYQ 1548 is a serial opposed format, four elements detector based on pyroceramic. It features smaller elements for the use of short focal length lenses such as the D37 lens. The signal is converted to a digital value using Sigma-Delta and DSP techniques. A configurable motion detection unit is implemented. Once motion was detected, an interrupt will be send to the host system. Putting the host system to sleep an overall ultra low power consumption will be achieved. All data is accessible by the host system to enable advanced signal analysis with your own detection criteria. Excelitas digital solutions provide excellent EMI immunity. Issued: 20/03/2018 / Revised: 17/04/2019 • Optimal for fast designs Applications • Short distance motion detection (with lens) • Energy saving applications • Intrusion alarms • Ceiling mounting applications • Battery operation Contents 1 Physical Characteristics 1.1 Pyro-Electric Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Optical Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 Filter Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Electrical Characteristics 2.1 Absolute Maximum Ratings 2.2 Electrical Data . . . . . . . 2.3 Interface Overview . . . . 2.4 Motion Detection Unit . . 2.5 Configuration Register . . 2.6 Serial In Interface . . . . . 2.7 Direct Link Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4 5 6 7 7 8 9 10 10 12 12 3 Handling, Operation and Precautions 15 3.1 Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4 Quality and Statements 16 5 Packaging 17 PYQ 1548 / 7660 Physical Characteristics Table 1: Summary of physical characteristics. Parameters and data refer to an ambient temperature of 25 ± 3 ◦C. Parameter Symbol Min Housing Field of View Typ Max Unit TO-5 FOV Element Size Spacing Responsivity R Match Match/R 8.4 140 0.8 × 0.8 0.8 10.2 Noise 60 IR-Filter Standard Remarks/Conditions see fig. 1 ◦ see sec. 1.2 mm see fig. 1 mm see fig. 1 kV W−1 see sec. 1.1 % see sec. 1.1 µVpp see sec. 1.1 10 200 see sec. 1.3 Figure 1: Dimensions and Connections. Explanations follow in this document. 3 Excelitas Technologies GmbH & Co. KG Wenzel-Jaksch-Str. 31 65199 Wiesbaden Germany Tel.: +49 (0)611 492 0 Fax.: +49 (0) 611 492 177 www.excelitas.com Product Specification 1 Issued: 20/03/2018 / Revised: 17/04/2019 PYQ 1548 / 7660 Pyro-Electric Elements The element configuration is shown in figure 1. It features a quad element configuration in a serial opposed format. Its typical application is short distance, ceiling mounted, motion detection . Figure 2: Test set up for the measurement of responsivity and match. 1 2 3 4 6 5 DSP Display Figure 3: Masking of elements to test the electrical parameters. Responsivity A B C D Match Noise Cover Plate The typical set-up for the measurement of responsivity and match is illustrated in figure 2. The black body (BB) radiator (1) is set to 373 K (100 ◦C). The signal is modulated by a rotating chopper (2). An aperture (3) is used to adjust the radiation flux. The cover plate (4) is masking the elements as shown in figure 3. The sensor (5) is interfaced to a signal processing chain (6). To measure noise, a bandpass filter in the range of 0.4 Hz to 10 Hz is applied. Responsivity (R ) and match are measured at a modulation frequency of 1 Hz. The match is defined by Match R × 100 (1) Noise is measured shut from infra-red energy. The measurement is performed after a settling time of 10 min at an ambient temperature of 25 ◦C ± 3 ◦C. Noise is monitored for the duration of 600 s . 4 Excelitas Technologies GmbH & Co. KG Wenzel-Jaksch-Str. 31 65199 Wiesbaden Germany Tel.: +49 (0)611 492 0 Fax.: +49 (0) 611 492 177 www.excelitas.com Product Specification 1.1 Issued: 20/03/2018 / Revised: 17/04/2019 PYQ 1548 / 7660 Product Specification 1.2 Issued: 20/03/2018 / Revised: 17/04/2019 Optical Properties Figure 4: Illustration for the definition of the horizontal field of view (FOV). FOV The horizontal field of view (FOV) as drawn to figure 4 is given as the geometrically unobstructed light path to both elements. The FOV of 140◦ is given for the optical light acceptance with the full so-called common mode suppression. The optical distance as it is given in figure 1 represents the effective focal plane for the application specific optics. The optical distance is shorter than the geometrical due to refraction of light in the filter. 5 Excelitas Technologies GmbH & Co. KG Wenzel-Jaksch-Str. 31 65199 Wiesbaden Germany Tel.: +49 (0)611 492 0 Fax.: +49 (0) 611 492 177 www.excelitas.com PYQ 1548 / 7660 Product Specification 1.3 Issued: 20/03/2018 / Revised: 17/04/2019 Filter Properties Table 2: Filter properties Parameter Symbol Min Average Filter Transmittance TA 77 Average Filter Transmittance TA Cut-on Wavelength λ(5 %) Typ 5.2 Max 5.5 Unit Remarks/Conditions % 7.5 µm < λ < 13.5 µm λ < 5 µm at 25 ◦C 0.5 % 5.8 µm Figure 5: Filter transmittance, typical curve 100 90 80 Transmittance [%] 70 60 50 40 30 20 10 0 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Wavelength [µm] 6 Excelitas Technologies GmbH & Co. KG Wenzel-Jaksch-Str. 31 65199 Wiesbaden Germany Tel.: +49 (0)611 492 0 Fax.: +49 (0) 611 492 177 www.excelitas.com PYQ 1548 / 7660 Electrical Characteristics 2.1 Absolute Maximum Ratings Table 3: Absolute Maxiumum Ratings. Data applicable to operation at free-air temperature range. Parameter Symbol Min Operating Voltage VDD I pin −0.3 −100 −40 −40 Current into any pin Storage Temperature Operating Temperature Typ Max Unit 3.6 100 85 70 V Remarks/Conditions mA ◦C < 60 % r.H. ◦C Stresses beyond the limits listed in table 3 may cause permanent damage to the device. Exposure to absolute maximum ratings for long time may affect the device reliability and may lead to deterioration of any parameter. 7 Excelitas Technologies GmbH & Co. KG Wenzel-Jaksch-Str. 31 65199 Wiesbaden Germany Tel.: +49 (0)611 492 0 Fax.: +49 (0) 611 492 177 www.excelitas.com Product Specification 2 Issued: 20/03/2018 / Revised: 17/04/2019 PYQ 1548 / 7660 Electrical Data Table 4: Electrical Data. Unless specified differently all data refers to 25 ± 3 ◦C. Parameter Symbol Min Typ Max Unit Operating Voltage VDD 1.8 IDD 3.6 3.5 V Supply Current 3 3 µA 0.2VDD V 1 2000 2000 µA Remarks/Conditions VDD =1.8 V, no load SERIN Input Low Voltage VSIL Input High Voltage VSIH Input Current ISI Data Clock Low Time tSL Data Clock High Time tSH Data In Hold Time tSHD Data Load Time tSLT 0.8VDD −1 200 200 72 580 V VSS 580 µs and the supply voltage is within the specified operating range after Power-Up. The configuration data is soonest available for read back 1600 µs after tSLT elapsed. To read back the sensor’s configuration, the DIRECT LINK interface is used. 2.7 Direct Link Interface The DIRECT LINK interface is a bi-directional one wire serial interface which is used to generate an interrupt or to continuously retrieve data from the sensor. Table 6: Content of the DIRECT LINK data stream when reading sensor out. Bit# Description Size[bit] Remarks [39] Out of Range 1 0: PIR was reset 1: Normal operation [38:25] ADC counts 14 Value of selected source [24:0] Configuration 25 Register settings Out of Range The ASIC features an out of range detection. Should the signal of the pyroelectric sensor drop below 511 counts or exceed 214 − 511 counts the input will be shorted for a duration of about 16 ms in order to discharge the sensor. This is indicated by a 0. A normal operation is indicated with a 1. The bit state remains 0 until the first data packet after the shorting operation is read out. Out of range conditions may occur for example during strong sensor temperature gradients of more than 1 K min−1 . ADC counts The data represents either ADC counts after low-pass filtering, after band-pass filtering or the reference temperature counts. The band-pass filtered data is represented as a two’s complement 14 bit signed integer value. The low-pass data and the reference temperature data is represented as 14 bit unsigned integer. 12 Excelitas Technologies GmbH & Co. KG Wenzel-Jaksch-Str. 31 65199 Wiesbaden Germany Tel.: +49 (0)611 492 0 Fax.: +49 (0) 611 492 177 www.excelitas.com PYQ 1548 / 7660 The settings of the alarm event unit is contained here. Details are described in section 2.5. Figure 9: Data Transmission Diagram tSMPL PIR status and ADC data Setup time Configuration registers tBS tDH tDS tBIT tDL … Forced Pulse Forced Read LSB bit 0 40f bit 1 40f bit 2 40f bit 3 40f bit 4 41f bit 5 41f bit 23 41f bit 24 40f bit 37 41f bit 38 40f MSB bit 39 40f Start Condition bit 25 40f … Interrupt Pulse Forced Read driven by host ® driven by DigiPyro host sampling Bit state Timing The DIRECT LINK interface communication principle is sketched in figure 9. It can be divided into the start condition and the data stream after it. The start condition for any communication is indicated by a LOW to HIGH transition of the DIRECT LINK line. That condition can be initiated either by the host system or the sensor. Initiating the condition with the host system is called "Forced Readout" mode. Initiating the condition with the sensor is called "Interrupt (driven) Readout" mode. Whether the sensor or the host is driving the start condition must be set in the sensor’s configuration of "Operation Mode" (see sec. 2.5). Wake up Mode The source for the Interrupt is the sensor’s Motion Detection Unit. Once motion was detected (see sec. 2.4) the sensor will pull the line from LOW to HIGH. The DIRECT LINK line will not automatically fall back to LOW. To reset the Motion Detection Unit, the host system must pull the line LOW for at least 35 µs. The host system can (but does not have to) proceed to the Readout of Bits not sooner than 75 µs after the Interrupt occurred and the DIRECT LINK was HIGH. In order to recognize the interrupt by the sensor, the host system’s connection to the DIRECT LINK line must have a high impedance (high Z) and be set to input. Forced Readout The sensor is expecting the host system to initiate the communication. Forcing DIRECT LINK to HIGH for at least tDS = 110 µs and then pulling it to LOW will start the communication. The host system can resume with the Readout of Bits. 13 Excelitas Technologies GmbH & Co. KG Wenzel-Jaksch-Str. 31 65199 Wiesbaden Germany Tel.: +49 (0)611 492 0 Fax.: +49 (0) 611 492 177 www.excelitas.com Product Specification Configuration Issued: 20/03/2018 / Revised: 17/04/2019 PYQ 1548 / 7660 Issued: 20/03/2018 / Revised: 17/04/2019 Readout of Bits The readout procedure is started by the forced or interrupt pulse. The low power DigiPyroTM waits for the next LOW to HIGH transition by the host system. The host system pulls the line HIGH and releases it (high impedance Z). The low power DigiPyroTM will pull the line LOW for a 0 bit state or keep it HIGH for a 1 bit state. The time tBS which the signal needs to settle to a LOW level depends on the capacitive load (e.g. PCB design) at the DIRECT LINK pin. Hence, it is recommended to start implementing the interface with tBIT close to, but shorter than 22 µs to ensure proper LOW level settling. In next steps reduce tBIT empirically to optimize for reliable data transmission at maximum transmission speed. After reading the line state by the host system, the host pulls the line again LOW to initiate the next bit readout by a LOW to HIGH transition again. The sequence will be repeated until all bits are shifted out. After the last bit of bit[0] the host controller must force DIRECT LINK pin to LOW for at least 500 ns and subsequently release DIRECT LINK (High Z). It has to be considered that tBIT must not exceed 22 µs to avoid data corruption. Under no circumstances DIRECT LINK may be at LOW level for longer than 22 µs . It is recommended that the total time to readout one data packet should not exceed 800 µs to ensure always latest values. In "Interrupt Mode" the total readout procedure must not exceed tSMPL < 12.5 ms. It is allowed to cancel the readout at any position of the data stream. To terminate the readout, DIRECT LINK must be forced to LOW level for at least 145 µs and subsequently released to input (High Z). In order to reduce settling effects, the data packets have to be read continuously with equal sampling intervals. 14 Excelitas Technologies GmbH & Co. KG Wenzel-Jaksch-Str. 31 65199 Wiesbaden Germany Tel.: +49 (0)611 492 0 Fax.: +49 (0) 611 492 177 www.excelitas.com Product Specification Interrupt Readout The sensor will drive the line typically every tSMPL = 16 ms HIGH. The host system must then pull the line to LOW in order to start the communication with the sensor. The host system can proceed to the Readout of Bits not sooner than 75 µs after the Interrupt occurred and the DIRECT LINK was HIGH. In order to recognize the interrupt by the sensor, the host system’s connection to the DIRECT LINK line must have a high impedance (high Z) and be set to input. The recommended readout mode is the "Forced Readout". PYQ 1548 / 7660 3.1 Handling, Operation and Precautions Handling Shelf Life The product can be stored for 12 months before usage at −10 ◦C to 40 ◦C (