DESCRIPTION

ZMD31020 is a CMOS integrated circuit for highly-accurate amplification and sensor-specific correction of bridge sensor signals. The device provides digital compensation of sensor offset, sensitivity, temperature drift and non-linearity by a 16-bit RISC micro controller running a correction algorithm.

ZMD31020 accommodates nearly all piezo-resistive bridge sensor types.
The bi-directional digital I2C interface can be used for a simple PC-controlled one-shot calibration procedure, in order to program a set of calibration coefficients into an on-chip EEPROM. Thus a specific sensor and a ZMD31020 are mated digitally: fast, precise and without the cost overhead associated with trimming by external devices or laser.

ZMD31020 has been designed for industrial and consumer applications and is specifically suited for most pressure sensors.

FEATURES

• Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity
• Adjustable to nearly all piezo-resistive bridge sensor types
• Digital one-shot calibration: quick and precise
• Selectable temperature compensation reference: internal or external diode
• Output options: 0...5V analog ratiometric voltage or 12 bit digital I2C interface
• Product traceability by user-defined EEPROM entries
• Operation temperature range, depending on product version, up to –40...+125°C
• Supply voltage +4.5...+5.5 V
• Sampling rate typ. 100 Hz
• Available in SSOP14 or as die

BENEFITS

• No external trimming components required
• PC-controlled configuration and calibration via digital bus interface - simple, low cost
• High accuracy (±0.1% FSO @ -25 to +85°C; ±0.25% FSO @ -40 to +125°C)

DOWNLOAD

• Data sheet:

  Download zmd31020.pdf