ZMD31012

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Contact Information

Servoflo Corporation
75 Allen Street
Lexington, MA 02421

Phone: (781)862-9572
Fax: (781) 862-9244

Digital and Mixed-Signal ICs from ZMD

Dual Low Cost Signal Condtioning ZMD31012 in 1 package

DESCRIPTION

ZMD31012 consists of two ZMD31010 dies in standard SSOP14 packages. ZMD31012 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 correct offset and gain with the option to correct offset and gain coefficients and linearity over temperature.  A second compensation can be enabled for temperature coefficients of gain or offset or bridge linearity.  ZMD31012 communicates via ZMD's ZACwire™ serial interface to the host comuter and is easily mass calibrated in a Windows® environment.  Once calibrated, the output SIG™ pin can provide selectable 0V to 1V, rail-to-rail ratiometric analog output, or digital serial output of bridge data with optional temperature data.

FEATURES

  • Separate digital compensation of sensor offset, sensitivity, temperature coefficient and non-linearity
  • Accommodates differential sensor signal spans from 1.2mV/V to 60mV/V for two inputs
  • Dual ZACwire™ one-wire interface
  • Internal temperature compensation and detection via bandgap PTAT (proportional to absolute temperature)
  • Optional sequential output of both temperature and bridge readings two ZACwire™ digital outputs
  • Output options: ratiometric analog voltage, absolute analog voltage, digital one-wire-interface
  • Supply voltage 2.7 to 5.5V, with external JFET 5.5V to 30V
  • Current consumption 2 mA
  • Wide operational temperature: -50°C to +150°C
  • Fast response time 1ms (typical)
  • High voltage protection up to 30V with external JFET
  • Chopper-stabilized true differential ADC
  • Buffered and chopper-stabilized output DAC

BENEFITS

  • No external trimming components required
  • PC-controlled configuration and calibration via one wire interface - simple, low cost
  • High accuracy (±0.1% FSO @ -25 to +85°C; ±0.25% FSO @ -40 to +125°C)
  • Single pass calibration - quick and precise
  • Suitable for applications that require redundancy
  • Measurement of differential pressure
  • Flow sensors

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