DESCRIPTION

ZMD31035  is a CMOS integrated circuit for highly-accurate amplification and sensor-specific correction of bridge sensor signals.  Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity is accomplished via a 16-bit RISC micro-controller running a correction algorithm with calibration coefficients stored in an EEPROM.  The ZMD31035 is adjustable to nearly all piezo-resistive bridge sensors.  Measured values are provided at the analog voltage output or at the one-wire -interface.  The digital one-wire-interface can be used for a simple PC-controlled calibration procedure, on order to program a set of calibration coefficients into an on-chip EEPROM.  Thus, a specific sensor and a ZMD31035 are mated digitally: fast, precise, and without the cost overhead associated with trimming by external devices or laser.  The ZMD31035 is optimized for automotive environments by its protection circuitry and excellent electromagnetic compatability. 

• Samples available
• Evaluation kit available, containing PCB's, software, documentation
• Support for industrial mass calibration available
• Quick circuit customization possible for large production volumes

FEATURES

• Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity
• Adjustable to nearly all piezoresistive bridge sensor types 
• Digital one-shot calibration: quick and precise
• Selectable temperature compensation reference:  internal or external diode
• Output: analog voltage (0 to 5V) and LINwire-Interface (one-wire-interface with LIN compatible protocol)
• Digital sensor calibration via one-wire interface
• Sampling rate typically 125 Hz (comparable with an analog bandwidth of approximately 400 Hz)
• High voltage protection
• Reverse polarity and short circuit protection
• Supply voltage 4.5 to 5.5V
• Wide operational temperature: -40°C to +125°C

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)

DOWNLOAD

• Data sheet:

  Download zmd31035.pdf