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Sensor-signal conditioner responds quickly

Melville, New York — ZMD America has expanded its resistive bridge signal conditioner RBICLite family with a fast, low-cost device that it claims provides easy PC-controlled configuration.

The device is a CMOS integrated circuit, which enables easy and precise calibration of resistive bridge sensors via EEPROM. 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. The sensor signal conditioner communicates via ZMD's ZACwire serial interface to the host computer and is easily mass calibrated in a Windows environment. Once calibrated, the output SIGnal pin can provide selectable 0 to 1 V, ratiometric analog ouput, digital serial output of bridge data, and optionally with bridge and temperature data. The device provides a fast response time of 1 ms. Fully contained, no external trimming components are required.

The conditioner employs a true-differential chopper-stabilized charged-balanced analog-to-digital converter (A/D converter), and a chopper-stabilized 11-bit monotonic digital-to-analog converter (D/A converter).

Other features include low quiescent current of under 250 μA for battery applications, 14-bit digital output resolution on pressure, selectable bridge readings, and temperature output signal in digital mode.

The device can be used in many different applications including automobiles, global navigation systems, handheld data loggers, medical products, personal digital assistants, and a variety of commercial and consumer applications.

An evaluation kit which includes a printed-circuit board, device samples, and all the necessary software and documentation is available.


Samples of the ZMD31010 are available now in an SOP8 package at a piece price of $2.30 each. In 100,000-piece quantities, devices are priced under $1.30
each. Click here for the ZMD 31010 data sheet.

ZMD America , 1-631-549-2666, www.zmd.biz.

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