AD8451ASTZ-RL

Overview

The AD8451ASTZ-RL is a precision analog front end and controller for battery test and formation systems. It integrates a fixed-gain instrumentation amplifier (26 V/V) for current sensing and a difference amplifier (0.8 V/V) for voltage measurement. The device supports automatic constant current to constant voltage switching and includes dedicated loop filter amplifiers. It operates on dual analog supplies of +5 V to +36 V and −31 V to 0 V, with a digital supply of 3 V to 5 V. Packaged in an 80-lead LQFP, it functions within a temperature range of −40°C to +85°C.

Feature Summary

• Integrated precision instrumentation amplifier with 26 V/V gain and 0.1% gain error
• Built-in difference amplifier with 0.8 V/V gain for accurate voltage monitoring
• Automatic CC/CV transition with integrated loop filter amplifiers
• TTL-compliant MODE pin for charge/discharge mode selection

Applications

• Battery cell formation and testing
• Battery module testing

Procurement Notes

Verify the specific ordering suffix RL against official Analog Devices documentation to confirm reel packaging specifications. Ensure compatibility with the required 80-lead LQFP footprint during procurement planning.

Selection Notes

Select this component for applications requiring high-precision current and voltage monitoring in battery management systems. Verify that the system power architecture supports the specified dual analog supply range (+5 V to +36 V and −31 V to 0 V) and digital logic levels.

Part Context

This part belongs to the AD845x series of precision analog front ends designed specifically for battery formation and test equipment. It provides a consolidated solution for signal conditioning and control interfacing in high-volume manufacturing environments.

Replacement Considerations

Public confirmed substitute part numbers are not available.