Programmable Bridge Resistive Sensor Signal Conditioner

Rajkumar Sharma
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SKU: EL139668
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The module presented here is a sensor signal conditioner based on ZSC31010 CMOS integrated circuit, which enables easy and precise calibration of resistive bridge sensors via EEPROM programming. When mated to a resistive bridge sensor, it will digitally calibrate offset and gain with the option to calibrate offset and gain coefficients and linearity over temperature. A second-order compensation can be enabled for temperature coefficients of gain or offset or bridge linearity. ZSC31010 module communicates via IDT’s ZACwire serial interface to the host computer and it is easily mass-calibrated in a Windows environment. Once calibrated, the output signal pin can provide selectable 0 to 1 V absolute analog output; rail-to-rail ratiometric analog output; or digital serial output of bridge data with optional temperature data. U1 LM317 provides the 5V DC to the sensor chip. D1 is the power LED.

Note: This sensor module requires a simple PC-controlled configuration and calibration via ZACwire™ One-Wire Interface.

Click the link below to download the calibration software, more information about the ZSC31010, and a video tutorial about the ZACwire interface.

https://www.renesas.com/us/en/products/sensor-products/sensor-signal-conditioners-ssc-afe/zsc31010-resistive-sensor-signal-conditioner-analog-output

Features

Supply Input 4V DC to 24V DC
Output 0 to 1V Or Digital
Current Consumption Approx 6mA Including LED
Digital compensation of sensor offset, sensitivity, temperature drift, and non-linearity
Accommodates differential sensor signal spans, from 3 mV/V to 105 mV/V
ZACwire™ One-Wire Interface (OWI)
Internal temperature compensation and detection via bandgap PTAT (proportional to absolute temperature)
Output options: rail-to-rail analog output voltage, absolute analog voltage, digital ZACwire™ One Wire Interface (OWI)
Optional sequential output of both temperature and bridge readings on ZACwire™ digital output
Fast response time, 1 ms (typical)
Chopper-stabilized true differential ADC
Buffered and chopper-stabilized output DAC
PCB Dimensions 22.54 x 18.10 mm

Connections and Other Details

CN1: Pin 1 = VCC 4V to 24V DC, Pin 2,3 = GND, Pin 4 = Output Analog/Digtal ZACwire Interface
CN2: Bridge Sensor Pin1 = VDD, Pin 3 = VBP, Pin 4 = VBN
D1: Power LED

Schematic

Parts List

NO	QNTY	REF	DESC	MANUFACTURER	SUPPLIER	SUPPLIER PART NO
1	2	CN1,CN2	4 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5317-ND
2	1	C1	10uF/25V CERAMIC SMD SIZE 1206	YAGEO/MURATA	DIGIKEY
3	2	C2,C3	1uF/25V CERAMIC SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
4	1	C4	10nF/50V CERAMIC SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
5	1	D1	LED RED SMD SIZE 0805	OSRAM	DIGIKEY	475-1278-1-ND
6	2	R1,R3	680E 1% SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
7	1	R2	220E 1% SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
8	1	R4	DNP
9	1	U1	LM317 DPAK	ST	DIGIKEY	497-1574-1-ND
10	1	U2	ZSC31010 SOIC8	IDT, Integrated Device Technology Inc	DIGIKEY	1833-1003-1-ND