The ZSSC3138 is a member of the ZSSC313x product family of CMOS integrated circuits designed for automotive and industrial sensor applications. All family members are well suited for highly accurate amplification and sensor-specific correction of resistive bridge sensor signals. An internal 16-bit RISC microcontroller running a correction algorithm compensates sensor offset, sensitivity, temperature drift, and non-linearity of the connected sensor element. The required calibration coefficients are stored by the single-pass calibration procedure in an on-chip EEPROM. The ZSSC3138 offers a maximum analog gain of 420 and two offset compensation features. These fit the requirements of ceramic thick-film-based sensor elements as well as strain gauges perfectly. The high amplification in combination with the offset compensation offers the capability to set up ceramic-thick-film-based sensor applications without laser trimming, which leads to better long-term stability.
Features
- Adjustable to nearly all resistive bridge sensor types, analog gain of 420, overall gain up to 1680
- Enhanced sample rate up to 7.8 kHz
- High ADC resolution 15/16 bit
- Safety functionality sensor connection
- Internal temperature compensation
- Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity
- Output options: ratiometric analog voltage output (5% to 95% maximum, 12.4 bit resolution) or ZACwire™ (digital one-wire-interface)
- Sensor biasing by voltage
- High voltage protection up to 33V
- Supply current: max. 5.5mA
- Reverse polarity and short circuit protection
- Operation temperature range as wide as -40°C to +150°C
- Traceability by user-defined EEPROM entries