Analog Devices Inc. AD8208 Precision Differential Amplifiers

Analog Devices AD8208 features high-voltage, precision differential amplifiers. AD8208 amplifiers operate from a single +5V supply and have a -2V to +45V input common-mode voltage. Qualified for automotive applications, the AD8208 amplifiers offer enhanced input overvoltage and ESD protection. This protection includes EMI filtering for improved system control. The AD8208 amplifiers deliver excellent AC and DC performance to minimize errors in the application. Typical offset and gain drift in both the SOIC and MSOP packages are less than 5µV/°C and 10ppm/°C, respectively. The devices also achieve a minimum CMRR of 80dB from dc to 10kHz. 

Designers can use an externally accessible 100kΩ resistor at the output of the preamplifier (A1) for low-pass filtering and establishing gains. The design makes the AD8208 amplifiers well-suited for low-pass filtering and amplifying small differential voltages in the presence of a large common-mode voltage.


  • Qualified for automotive applications
  • EMI filters included
  • High common-mode voltage range
    • −2V to +45V operating
    • −24V to +80V survival
  • Buffered output voltage
  • Gain = 20V/V
  • Low-pass filter (1-pole or 2-pole)
  • Wide operating temperature range
    • −40°C to +125°C for WB grade
    • −40°C to + 150°C for WH grade
  • Excellent AC and DC performance
    • ±1mV voltage offset
    • −5ppm/°C typical gain drift
    • 80dB CMRR minimum dc to 10kHz


  • High-side current sensing
  • Motor controls
  • Solenoid controls
  • Power management
  • Low-side current sensing
  • Diagnostic protection

Block Diagram

Block Diagram - Analog Devices Inc. AD8208 Precision Differential Amplifiers
Publicado: 2016-10-25 | Atualizado: 2022-03-11