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AMC1400

ACTIVE

±250-mV input, precision, current-sensing, reinforced isolated amplifier with high CMTI

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Data sheet

AMC1400

ACTIVE
Data sheet Order now

Product details

Device type Current sensing Output type Differential Peak-to-peak input voltage range (V) 0.25 Isolation rating Reinforced Withstand isolation voltage (VISO) (Vrms) 7500 Working isolation voltage (VIOWM) (Vrms) 2000 Transient isolation voltage (VIOTM) (VPK) 10600 CMTI (min) (kV/µs) 100 Creepage (min) (mm) 15.7 Clearance (min) (mm) 15.7 Input offset (±) (max) (V) 0.0002 Input offset drift (±) (typ) (µV/°C) 0.1 Rating Catalog Operating temperature range (°C) -40 to 125
Device type Current sensing Output type Differential Peak-to-peak input voltage range (V) 0.25 Isolation rating Reinforced Withstand isolation voltage (VISO) (Vrms) 7500 Working isolation voltage (VIOWM) (Vrms) 2000 Transient isolation voltage (VIOTM) (VPK) 10600 CMTI (min) (kV/µs) 100 Creepage (min) (mm) 15.7 Clearance (min) (mm) 15.7 Input offset (±) (max) (V) 0.0002 Input offset drift (±) (typ) (µV/°C) 0.1 Rating Catalog Operating temperature range (°C) -40 to 125
SOIC (DWL) 8 106.24 mm² (6.4 mm × 16.6 mm)
  • ±250-mV input voltage range optimized for current measurements using shunt resistors
  • Fixed gain: 8.2 V/V
  • Low DC errors:
    • Offset error: ±0.2 mV (max)
    • Offset drift: ±0.9 µV/°C (max)
    • Gain error: ±0.3% (max)
    • Gain drift: ±30 ppm/°C (max)
    • Nonlinearity: 0.03% (max)
  • 3.3-V or 5-V operation on high-side and low-side
  • Missing high-side supply detection feature
  • High CMTI: 100 kV/µs (min)
  • Low EMI, meets CISPR-11 and CISPR-32 standards
  • ≥15.7-mm creepage, stretched SOIC package
  • Safety-related certifications:
    • 10600-VPK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 7500-VRMS isolation for 1 minute per UL1577
  • Fully specified over the extended industrial temperature range: –40°C to +125°C
  • ±250-mV input voltage range optimized for current measurements using shunt resistors
  • Fixed gain: 8.2 V/V
  • Low DC errors:
    • Offset error: ±0.2 mV (max)
    • Offset drift: ±0.9 µV/°C (max)
    • Gain error: ±0.3% (max)
    • Gain drift: ±30 ppm/°C (max)
    • Nonlinearity: 0.03% (max)
  • 3.3-V or 5-V operation on high-side and low-side
  • Missing high-side supply detection feature
  • High CMTI: 100 kV/µs (min)
  • Low EMI, meets CISPR-11 and CISPR-32 standards
  • ≥15.7-mm creepage, stretched SOIC package
  • Safety-related certifications:
    • 10600-VPK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 7500-VRMS isolation for 1 minute per UL1577
  • Fully specified over the extended industrial temperature range: –40°C to +125°C

The AMC1400 is a precision, isolated amplifier with an output separated from the input circuitry by an isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide reinforced galvanic isolation of up to 7.5 kVRMS according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577, and supports a working voltage of up to 2 kVRMS.

The isolation barrier separates parts of the system that operate on different common-mode voltage levels and protects the low-side from voltage levels that can cause electrical damage and are potentially harmful to an operator.

The input of the AMC1400 is optimized for direct connection to a low-impedance shunt resistor or other low-impedance voltage source with low signal levels. The excellent DC accuracy and low temperature drift supports accurate current control in DC/DC converters, frequency inverters, AC motor drives, and other applications that must operate at high voltages, high altitudes, or in environments with high pollution degrees.

The AMC1400 is offered in a stretched SOIC package and is specified over the extended industrial temperature range from –40°C to +125°C .

The AMC1400 is a precision, isolated amplifier with an output separated from the input circuitry by an isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide reinforced galvanic isolation of up to 7.5 kVRMS according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577, and supports a working voltage of up to 2 kVRMS.

The isolation barrier separates parts of the system that operate on different common-mode voltage levels and protects the low-side from voltage levels that can cause electrical damage and are potentially harmful to an operator.

The input of the AMC1400 is optimized for direct connection to a low-impedance shunt resistor or other low-impedance voltage source with low signal levels. The excellent DC accuracy and low temperature drift supports accurate current control in DC/DC converters, frequency inverters, AC motor drives, and other applications that must operate at high voltages, high altitudes, or in environments with high pollution degrees.

The AMC1400 is offered in a stretched SOIC package and is specified over the extended industrial temperature range from –40°C to +125°C .
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Technical documentation

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* Data sheet AMC1400 Precision, ±250-mV Input, Reinforced Isolated Amplifierin a 15-mm Stretched SOIC Package datasheet PDF | HTML Jul 25, 2022
Application brief Shunt Resistor Selection for Isolated Data Converters PDF | HTML May 4, 2023
Certificate AMC1400EVM EU RoHS Declaration of Conformity (DoC) Sep 20, 2022
Circuit design Isolated Current-Sensing Circuit W/ ±250-mV Input Range & Single-Ended Output PDF | HTML Jun 27, 2022
Certificate UL Certificate of Compliance Vol4 Sec13 - E181974 May 20, 2022
Application brief TI's First Isolated Amplifiers With Ultra-Wide Creepage and Clearance PDF | HTML Aug 13, 2021
Circuit design Isolated current-measurement circuit with ±250-mV input and differential output Jul 23, 2020

Design & development

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Evaluation board

AMC-AMP-50A-EVM — Evaluation module for ±50A AMCxx amplifier

The AMC-AMP-50A-EVM is an isolated current-sensing evaluation module (EVM) designed for ±50A shunt-based current sensing. This EVM allows users to sense up to ±50A peak current through an external shunt resistor while measuring the isolated output through the isolation barrier of the AMC3302. The (...)
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Evaluation board

AMC1400EVM — AMC1400 evaluation module for ±250-mV input, precision, voltage-sensing isolated amplifier

The AMC1400 evaluation module (EVM) is an platform for developing the AMC1400, which is a precision isolated amplifier with a ±250-mV input range and an output separated from the input circuitry by a silicon dioxide (SiO2) barrier that is highly resistant to magnetic interference. AMC1400 10600-VPK (...)

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Calculation tool

SBAR013 — Isolated Amplifier Voltage Sensing Excel Calculator

This calculator provides estimates of the errors associated with using isolation amplifier devices in a voltage sensing configuration.
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