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AMC1200

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±250-mV-input basic isolated amplifier for current sensing

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Data sheet
±250-mV-input basic isolated amplifier for current sensing

AMC1200

ACTIVE
Data sheet Order now

Product details

Input range (Vp-p) ±0.25 Isolation working voltage VIOWM (rms) (V) 800 Isolation transient overvoltage VIOTM (peak) (V) 4250 CMTI (Min) (kV/µs) 10 Input offset (+/-) (Max) (mV) 1.5 Input offset drift (+/-) (Typ) (uV/C) 1.5 Gain error (+/-) (Max) (%) 1 Gain error drift (+/-) (Typ) (ppm/°C) 56 Gain non-linearity (+/-) (Max) (%) 0.075 Small signal bandwidth (Typ) (kHz) 100 Rating Catalog Operating temperature range (C) -40 to 105
Input range (Vp-p) ±0.25 Isolation working voltage VIOWM (rms) (V) 800 Isolation transient overvoltage VIOTM (peak) (V) 4250 CMTI (Min) (kV/µs) 10 Input offset (+/-) (Max) (mV) 1.5 Input offset drift (+/-) (Typ) (uV/C) 1.5 Gain error (+/-) (Max) (%) 1 Gain error drift (+/-) (Typ) (ppm/°C) 56 Gain non-linearity (+/-) (Max) (%) 0.075 Small signal bandwidth (Typ) (kHz) 100 Rating Catalog Operating temperature range (C) -40 to 105
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SOIC (DWV) 8 67 mm² 5.85 x 11.5 SOP (DUB) 8 99 mm² 9.5 x 10.4
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  • ±250-mV Input Voltage Range Optimized for
    Shunt Resistors
  • Very Low Nonlinearity: 0.075% Maximum at 5 V
  • Low Offset Error: 1.5 mV Maximum
  • Low Noise: 3.1 mVRMS Typical
  • Low High-Side Supply Current:
    8 mA Maximum at 5 V
  • Input Bandwidth: 60 kHz Minimum
  • Fixed Gain: 8 (0.5% accuracy)
  • High Common Mode Rejection Ratio: 108 dB
  • 3.3-V Operation on Low-Side
  • Certified Galvanic Isolation:
    • UL1577 and VDE V 0884-10 Approved
    • Isolation Voltage: 4250 VPEAK (AMC1200B)
    • Working Voltage: 1200 VPEAK
    • Transient Immunity: 10 kV/µs Minimum
  • Typical 10-Year Lifespan at Rated Working
    Voltage (see Application Report SLLA197)
  • Fully Specified Over the Extended Industrial
    Temperature Range
  • ±250-mV Input Voltage Range Optimized for
    Shunt Resistors
  • Very Low Nonlinearity: 0.075% Maximum at 5 V
  • Low Offset Error: 1.5 mV Maximum
  • Low Noise: 3.1 mVRMS Typical
  • Low High-Side Supply Current:
    8 mA Maximum at 5 V
  • Input Bandwidth: 60 kHz Minimum
  • Fixed Gain: 8 (0.5% accuracy)
  • High Common Mode Rejection Ratio: 108 dB
  • 3.3-V Operation on Low-Side
  • Certified Galvanic Isolation:
    • UL1577 and VDE V 0884-10 Approved
    • Isolation Voltage: 4250 VPEAK (AMC1200B)
    • Working Voltage: 1200 VPEAK
    • Transient Immunity: 10 kV/µs Minimum
  • Typical 10-Year Lifespan at Rated Working
    Voltage (see Application Report SLLA197)
  • Fully Specified Over the Extended Industrial
    Temperature Range
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The AMC1200 and AMC1200B are precision isolation amplifiers with an output separated from the input circuitry by a silicon dioxide (SiO2) barrier that is highly resistant to magnetic interference. This barrier has been certified to provide galvanic isolation of up to 4250 VPEAK (AMC1200B) or 4000 VPEAK (AMC1200) according to UL1577 and VDE V 0884-10. Used in conjunction with isolated power supplies, these devices prevent noise currents on a high common mode voltage line from entering the local ground and interfering with or damaging sensitive circuitry.

The input of the AMC1200 or AMC1200B is optimized for direct connection to shunt resistors or other low voltage level signal sources. The excellent performance of the device supports accurate current control resulting in system-level power saving and, especially in motor-control applications, lower torque ripple. The common mode voltage of the output signal is automatically adjusted to either the 3-V or 5-V low-side supply.

The AMC1200 and AMC1200B are fully specified over the extended industrial temperature range of –40°C to 105°C and are available in a wide-body SOIC-8 package (DWV) and a gullwing-8 package (DUB).

The AMC1200 and AMC1200B are precision isolation amplifiers with an output separated from the input circuitry by a silicon dioxide (SiO2) barrier that is highly resistant to magnetic interference. This barrier has been certified to provide galvanic isolation of up to 4250 VPEAK (AMC1200B) or 4000 VPEAK (AMC1200) according to UL1577 and VDE V 0884-10. Used in conjunction with isolated power supplies, these devices prevent noise currents on a high common mode voltage line from entering the local ground and interfering with or damaging sensitive circuitry.

The input of the AMC1200 or AMC1200B is optimized for direct connection to shunt resistors or other low voltage level signal sources. The excellent performance of the device supports accurate current control resulting in system-level power saving and, especially in motor-control applications, lower torque ripple. The common mode voltage of the output signal is automatically adjusted to either the 3-V or 5-V low-side supply.

The AMC1200 and AMC1200B are fully specified over the extended industrial temperature range of –40°C to 105°C and are available in a wide-body SOIC-8 package (DWV) and a gullwing-8 package (DUB).

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Technical documentation

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Type Title Date
* Data sheet AMC1200/B Fully-Differential Isolation Amplifier datasheet (Rev. D) 10 Jun 2015
Selection guide Current Sense Amplifiers (Rev. E) 20 Sep 2021
White paper Best in Class Radiated Emissions EMI Perf. with AMC1300B-Q1 Isolated Amplifier 29 Jun 2020
E-book Simplifying Current Sensing (Rev. A) 09 Jan 2020
White paper Comparing isolated amplifiers and isolated modulators (Rev. A) 28 Feb 2019
Certificate UL Certification (File: E181974 Project: 478705069) (Rev. C) 11 Jun 2018
Technical article Voltage and current sensing in HEV/EV applications 22 Nov 2017
Application note Interfacing a Differential-Output (Isolated) Amp to a Single-Ended Input ADC 19 Apr 2017
Technical article Tripping Point: Isolation amplifier-based alternating current voltage measurement in protection relays 07 Oct 2016
Design guide Shunt Based 200A Peak Current Measurement Using Isolation Amplifier Design Guide (Rev. A) 05 Mar 2016
Certificate CSA Certification (Certificate: 220991) (Rev. A) 23 Oct 2015
Technical article Six ways to sense current and how to decide which to use 10 Jul 2015
Technical article Get cerTIfied, not certi-FRIED! Electromagnetic compatibility testing explained (Part 4) 06 Feb 2015
User guide AMC1200EVM User Guide (Rev. A) 30 Jul 2013
User guide 0-5 A, Single-Supply, 2 kV Isolated Current Sensing Solution 18 Jun 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

AMC1200EVM — AMC1200 evaluation module for ±250-mV-input basic isolated amplifier for current sensing

The AMC1200 is an isolated single-channel analog amplifier an output separated from the input circuitry by a silicon dioxide (SiO2) barrier that is highly resistant to magnetic interference. The AMC1200 is used in high-resolution measurement applications including current monitoring, industrial (...)

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Simulation model

AMC1200 TINA-TI Spice Model

SBAM097.ZIP (11 KB) - TINA-TI Spice Model
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Simulation model

AMC1200 TINA-TI Reference Design

SBAM098.ZIP (24 KB) - TINA-TI Reference Design
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Simulation model

AMC1200 PSpice Model

SBAM289.ZIP (4 KB) - PSpice Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Reference designs

TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom (...)
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Reference designs

TIDA-00834 — High Accuracy Analog Front End Using 16-Bit SAR ADC with ±10V Measurement Range Reference Design

The TIDA-00834 reference design accurately measures voltage and current inputs using simultaneously sampled, 16-bit, ±10 V, bipolar input SAR ADC critical to identify power systems malfunction and power quality related failures accurately and quickly. This results in reduced power systems (...)
document-generic Schematic
Reference designs

TIDA-00835 — High Accuracy ±0.5% Current and Isolated Voltage Measurement Ref Design Using 24-Bit Delta-Sigma ADC

The TIDA-00835 reference design allows for accurate voltage and current measurement using a bipolar input configuration by incorporating a four- channel, 24-bit simultaneously-sampling differential input Delta-Sigma ADC over wide dynamic range. The ADC is configured to measure ±2.5 V bipolar (...)
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Reference designs

TIDA-00195 — Isolated IGBT Gate Driver Evaluation Platform for 3-Phase Inverter System Reference Design

The TIDA-00195 reference design consists of a 22kW power stage with TI’s new reinforced isolated IGBT gate driver ISO5852S intended for motor control in various applications. This design allows performance evaluation of the ISO5852S in 3-phase inverter incorporating 1200V rated IGBT modules (...)
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Reference designs

TIDA-00810 — Reference Design to Measure AC Voltage & Current in Protection Relays w/Delta-Sigma Chip Diagnostics

The TIDA-00810 reference design accurately measures analog inputs performance and includes chip diagnostics to help identify power  systems failures early by using a highly accuracy AC voltage and current measurement analog front end (AFE) and a four-channel, 24-bit simultaneously-sampling (...)
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Reference designs

TIDA-00445 — Shunt-Based 200A Peak Current Measurement Reference Design Using Isolation Amplifier

This reference design is for isolated current measurement using a shunt and isolated amplifier. By limiting the shunt voltage to 25 mV, this design is able to reduce power dissipation in the shunt and achieve a high-current measurement range of up to 200 A. Shunt voltage is further amplified (...)
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Reference designs

PMP9480 — Isolated Bias Supplies + Isolated Amplifier Combo for Line Voltage or Current Measurement

PMP9480 is a dual  output Flybuck Converter plus an Isolated amplifier combo solution that can not only be used for sensing Line voltage or Line current but also  provide Aux Bias power for  complete Industrial system .  The design accepts very Wide input voltage of 10 Vin to (...)
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Reference designs

TIPD121 — Isolated Current Sensing Reference Design Solution, 5A, 2kV

This TI Precision Reference Design provides a user-side solution for providing power to the hot side of an isolated current shunt monitor. The first step in creating an isolated current sense solution, is to provide power to the primary side of the sensor. This reference design will go through the (...)
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