Analog Devices Inc. AD8450 Precision Analog Front End & Controllers

Analog Devices Inc. AD8450 Precision Analog Front End & Controllers are ideal for testing and monitoring battery cells. The precision programmable gain instrumentation amplifier (PGIA) measures the battery charge / discharge current while a programmable gain difference amplifier (PGDA) measures the battery voltage. Internal laser trimmed resistor networks set the gains for the PGIA and the PGDA, optimizing the performance of the AD8450 over the rated temperature range of -40°C to +85°C. PGIA gains are 26, 66, 133, and 200. PGDA gains are 0.2, 0.27, 0.4, and 0.8. ADI AD8450 includes resistor programmable overvoltage and overcurrent detection and current sharing circuitry. Current sharing is used to balance charge among multiple batteries.


  • Integrated constant current and voltage modes with automatic switchover
  • Charge and Discharge modes
  • Precision voltage and current measurement
  • Integrated precision control feedback blocks
  • Precision interface to PWM or linear power converters
  • Programmable gain settings
  • 26, 66, 133, 200 Current sense gains
  • 0.2, 0.27, 0.4, 0.8 Voltage sense gains
  • Programmable OVP, OCP fault detection
  • Current sharing and balancing
  • Excellent AC and DC performance


  • Battery cell testing and formation
  • Battery module testing
Published: 2014-04-16 | Updated: 2022-03-11