AMC1200TDWVRQ1

Overview

The AMC1200TDWVRQ1 is a fully-differential precision isolation amplifier designed for automotive applications. It features an input voltage range of ±250 mV, optimized for shunt resistor sensing. The device provides galvanic isolation with a working voltage of 1200 VPEAK and a test voltage of 4250 VPEAK. It operates with a high-side supply of 4.5 V to 5.5 V and a low-side supply of 2.7 V to 5.5 V. The nominal gain is fixed at 8 with 0.5% accuracy. Key electrical characteristics include a minimum small-signal bandwidth of 60 kHz, a maximum input offset voltage of 1.5 mV, and a typical common-mode rejection ratio of 108 dB.

Feature Summary

• Certified galvanic isolation barrier resistant to magnetic interference
• Optimized for direct connection to shunt resistors in current sensing
• Fully-differential output with self-adjusting common-mode voltage
• AEC-Q100 qualified for automotive environments

Applications

• Isolated shunt-resistor-based current sensing in traction inverters
• Current or voltage sensing in on-board chargers
• Isolated measurement in DC-DC converters
• Current sensing in battery management systems

Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 automotive qualification and temperature grade 2 (-40°C to 105°C). Confirm the 'DWVR' suffix indicates the SOIC-8 wide-body package and tape-and-reel shipping format. Ensure the datasheet revision matches the design requirements for insulation ratings and thermal metrics.

Selection Notes

Select this component when high common-mode transient immunity and low nonlinearity are required in automotive power electronics. The fixed gain of 8 simplifies signal conditioning for shunt-based measurements. Verify that the system's high-side supply can provide the necessary 8 mA max current and that the PCB layout accommodates the required creepage and clearance distances for the specified isolation voltage.

Part Context

This part belongs to the AMC1200-Q1 family of fully-differential isolation amplifiers from Texas Instruments. It utilizes a silicon dioxide (SiO2) capacitive isolation barrier to separate high-voltage domains from low-voltage control circuitry. The device is distinct from standard operational amplifiers by its integrated digital modulation and demodulation architecture, which ensures high reliability against electromagnetic interference.

Replacement Considerations

AMC1200BDWVRQ1