ZMD31010
Brief Description
The ZMD31010 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. ZMD31010 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.
- Development Kit available
- Support for mass calibration available
- Quick circuit customization possible for large production volumes
Key Features
- Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity
- Accommodates differential sensor signal spans from 1.2 to 36mV/V
- ZACwire™ one-wire interface
- Internal temperature compensation and detection via bandgap PTAT*
- Optional sequential output of both temperature and bridge readings on ZACwire digital output
- Output options: ratiometric analog voltage, absolute analog voltage, digital one-wire-interface
- Supply voltage 2.7V to 5.5 V, with external JFET 5.5V to 30 V
- Current consumption, depending on adjusted sample rate, 0.25 mA to 1 mA
- Wide operational range -50°C to +150°C
- Fast response time 1 ms
- High voltage protection up to 30V with external JFET
- Chopper stabilized true differential ADC
- Buffered and chopper stabilized output DAC
- Proportional to absolute temperature
Benefits
- 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
- Suitable for battery powered applications
- Small SOP8 package
Applications
the ZMD31010 is used in:
- Appliances / Filter Check, Refrigerant
- Consumer / Blood Pressure Meters, mobile phones, PDAs, wrist watches, Misc. Battery Applications
- Industrial / Process Control, Dataloggers
- Medical / Blood Pressure Meters, mobile phones, PDAs, wrist watches, Misc. Battery Applications