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AD8451 - Precision Analog Front End and Controller

General Description

The AD8451 is a precision analog front end and controller for testing and monitoring battery cells.

A precision fixed gain instrumentation amplifier (IA) measures the battery charge/ discharge current, and a fixed gain difference amplifier (DA) measures the battery voltage (see Figure 1).

Key Features

  • 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 Fixed gain settings Current sense gain: 26 V/V (typ) Voltage sense gain: 0.8 V/V (typ) Excellent ac and dc performance Maximum offset voltage drift: 0.9 µV/°C Maximum gain drift: 3 ppm/°C Low current sense amplifier input voltage noise: 9 nV/√Hz typ Current se.

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Datasheet Details

Part number AD8451
Manufacturer Analog Devices
File Size 934.87 KB
Description Precision Analog Front End and Controller
Datasheet download datasheet AD8451 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Low Cost, Precision Analog Front End and Controller for Battery Test/Formation Systems Data Sheet FEATURES 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 Fixed gain settings Current sense gain: 26 V/V (typ) Voltage sense gain: 0.8 V/V (typ) Excellent ac and dc performance Maximum offset voltage drift: 0.9 µV/°C Maximum gain drift: 3 ppm/°C Low current sense amplifier input voltage noise: 9 nV/√Hz typ Current sense CMRR: 108 dB min TTL compliant logic AD8451 GENERAL DESCRIPTION The AD8451 is a precision analog front end and controller for testing and monitoring battery cells.