Features two ZMD31010

• 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

• Internal temperature compensation reference

via bandgap PTAT*

• Optional sequential output of both temperature and bridge

• Output options: ratiometric analog voltage, absolute analog

voltage, digital one-wire-interface

• Supply voltage 2.7V to 5.5V, with external JFET 5.5V to 30V

• Current consumption 2mA

• Operation temperature -50°C to +150°C

• Fast response time: 1ms

• High voltage protection up to 30V with external JFET

• Chopper stabilized true differential ADC

• Buffered and chopper stabilize output DAC

*Proportional to absolute temperature

• ZMD31010 Development Kit can be used

• Support for industrial mass calibration will be available

• Quick circuit customization possible for large production volumes

Application Circuit

Benefits

The ZMD31012 combines the benefits of two single ZMD31010.

• No external trimming components required

• PC-controlled configuration and calibration via one-wire interface

– simple, low cost

• High accuracy (±0.1% FSO @ -25°C to 85°C;

±0.25% FSO @ -40°C to 125°C)

• Single pass calibration – quick and precise

Due to the two independent channels the ZMD31012 provides

a perfect fit for the following selected samples:

• Applications that require redundancy

• Measurement of differential pressure

• Flow Sensors

Brief Description

The ZMD31012 consists of two ZMD31010 dies in a 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 compensa-

tion can be enabled for temperature coefficients of gain or offset

serial interface to the host computer and is easily mass calibrated in

1V, rail-to-rail ratiometric analog output, or digital serial output of

bridge data with optional temperature data.

ZMD31012

Two Low-cost Sensor Signal Conditioners

ZMD31010 Chips in One Package

P R E L I M I N A RY