概览

优势和特点

  • LIN 2.1 compliant interface (bridge sensor signal, temperature)
  • Digitally programmable gain and offset voltage adjustment
  • Gain range from 2.94 V/V to 971.10 V/V
  • Sensor temperature compensation (first- or second-order)
  • Sensor nonlinearity correction (first- or second-order)
  • Internal or external temperature sensor compensation
  • EEPROM nonvolatile memory for calibration data
  • High system accuracy: 0.1% FSR over temperature
  • EMC and EMI protection
  • Fault protection for open circuits and short circuits
  • 4 mm × 4 mm, 20-lead LFCSP
  • 6 V to 18 V supply operation
  • −40°C to +150°C operating temperature range
  • AEC-Q100 qualified for automotive applications

产品详情

The ADA4558 is a fully integrated, sensor signal conditioner IC for bridge sensors. The device provides digital nonlinearity correction and temperature compensation via internal or external sensed temperatures using on-chip correction and calibration hardware that can be optimized for a specific bridge sensor. 

The ADA4558 utilizes a fourth-order digital correction algorithm and delivers a system accuracy of 0.1% full scale range (FSR) for bridge sensors with second-order nonlinearity sensitivity. The ADA4558 includes a local interconnect network (LIN) physical interface for single-wire, high voltage communications in automotive environments. LIN 2.1 and earlier versions are supported. The LIN interface allows access to measurements, end of line (EOL) calibration, and a wide range of diagnostic functions. 

The analog subsystem consists of an analog-to-digital converter (ADC) and a programmable gain amplifier (PGA) with a wide gain range from 2.94 V/V to 971.10 V/V. To minimize power supply noise, the bridge sensor is biased with an internal 4 V voltage regulator. The ADA4558 is fully specified from −40°C to +150°C. The device operates from battery supply voltages of 6 V to 18 V. The ADA4558 is available in a 4 mm × 4 mm, 20-lead lead frame chip scale package (LFCSP). 

Applications

  • Strain gage
    • Pressure signal conditioner for automotive vehicles 

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