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Texas Instruments AMC0381D Reinforced Isolated Amplifiers

Texas Instruments AMC0381D Reinforced Isolated Amplifiers are precision, galvanically isolated amplifiers with a high-voltage DC, high impedance input, and a fixed-gain differential output. The input is designed to connect directly to a high-voltage signal source. The isolation barrier separates parts of the system that operate on different common-mode voltage levels. The isolation barrier is certified to provide reinforced isolation of up to 5kVRMS (60s) and is highly resistant to magnetic interference.

The Texas Instruments AMC0381D outputs a differential signal proportional to the input voltage. The differential output is insensitive to ground shifts and enables routing the output signal over long distances. The AMC0381D is available in three linear input voltage ranges: 600V, 1000V, and 1600V. With an integrated precision resistive divider, the AMC0381D achieves better than 1% accuracy over the full temperature range, including lifetime drift. The AMC0381D is available in a 15-pin, 0.65mm pitch SSOP package. The device is fully specified over the temperature range from –40°C to +125°C.

Features

  • Integrated, high-voltage resistive divider for direct DC voltage sensing without external resistors
  • Differential output
  • Supply voltage range
    • High-side (VDD1): 3.0V to 5.5V
    • Low-side (VDD2): 3.0V to 5.5V
  • Low DC errors
    • Offset error: ±0.8mV (max.)
    • Offset drift: ±10µV/°C (max.)
    • Attenuation error: ±0.25% (max.)
    • Attenuation drift: ±40ppm/°C (max.)
    • Nonlinearity: 0.025% (max.)
  • 150V/ns (min.) high CMTI
  • Low EMI that meets CISPR-11 and CISPR-25 standards
  • Available input options
    • AMC0381D06: 600V, 10MΩ
    • AMC0381D10: 1000V, 12.5MΩ
    • AMC0381D16: 1600V, 33.5MΩ
  • Safety-related certifications
    • 7000VPK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 5000VRMS isolation for 1 minute per UL 1577
  • Fully specified over the extended industrial temperature range of –40°C to +125°C

Applications

  • Server power-supply units (PSU)
  • Energy storage systems (ESS)
  • Solar inverters
  • EV charging stations

Functional Block Diagram

Block Diagram - Texas Instruments AMC0381D Reinforced Isolated Amplifiers

Development Tool

Texas Instruments AMC038XEVM Evaluation Module (EVM)

Demonstrates a high-precision, high-voltage sensing design with one of the AMC038x devices.

Learn Moreabout Texas Instruments AMC038XEVM Evaluation Module (EVM) View Productsrelated to Texas Instruments AMC038XEVM Evaluation Module (EVM)
Published: 2025-12-10 | Updated: 2025-12-18