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