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AMC1200

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±250 mV-Input Basic Isolated Amplifier for Current Sensing

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±250 mV-Input Basic Isolated Amplifier for Current Sensing

AMC1200

ACTIVE
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Product details

Parameters

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 open-in-new Find other Isolated amplifiers

Package | Pins | Size

SOIC (DWV) 8 67 mm² 5.85 x 11.5 SOP (DUB) 8 99 mm² 9.5 x 10.4 open-in-new Find other Isolated amplifiers

Features

  • ±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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Description

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
* Datasheet AMC1200/B Fully-Differential Isolation Amplifier datasheet (Rev. D) Jun. 10, 2015
White papers Best in Class Radiated Emissions EMI Perf. with AMC1300B-Q1 Isolated Amplifier Jun. 29, 2020
Technical articles Isolation 101: How to find the right isolation solution for your application Feb. 11, 2020
White papers Simplifying Current Sensing (Rev. A) Jan. 09, 2020
Technical articles Staying on budget: How digital isolators are transforming field transmitters May 24, 2019
Technical articles Interlocking gate drivers for improving the robustness of three-phase inverters Mar. 26, 2019
Technical articles Chief Technology Officer Ahmad Bahai discusses isolation in a world of collaboration Oct. 02, 2018
More literature UL Certification (File: E181974 Project: 478705069) (Rev. C) Jun. 11, 2018
Selection guides Current Sense Amplifiers (Rev. D) Apr. 04, 2018
Application notes Interfacing a Differential-Output (Isolated) Amp to a Single-Ended Input ADC Apr. 19, 2017
User guides Shunt Based 200A Peak Current Measurement Using Isolation Amplifier Design Guide (Rev. A) Mar. 05, 2016
More literature CSA Certification (Certificate: 220991) (Rev. A) Oct. 23, 2015
User guides AMC1200EVM User Guide (Rev. A) Jul. 30, 2013
User guides 0-5 A, Single-Supply, 2 kV Isolated Current Sensing Solution Jun. 18, 2013

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
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Description

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 (...)

Features
  • 2mm, 2-terminal screw connectors to provide easy access to the analog inputs and outputs of the amplifier
  • ±250mV input range optimized for shunt resistor applications
  • Fully differential output with common mode voltage automatically adjusted to VDD2/2
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Design tools & simulation

SIMULATION MODELS Download
SBAM097.ZIP (11 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBAM098.ZIP (24 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBAM289.ZIP (4 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
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TIDA-010065 — 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 for (...)
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High Accuracy Analog Front End Using 16-Bit SAR ADC with ±10V Measurement Range Reference Design
TIDA-00834 — 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 (...)
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REFERENCE DESIGNS Download
High Accuracy ±0.5% Current and Isolated Voltage Measurement Ref Design Using 24-Bit Delta-Sigma ADC
TIDA-00835 — 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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Battery Pack Controller Communications Bridge Reference Design
TIDA-01400 — The Bridge BoosterPack demonstrates the bq76PL455A-Q1 configured as a dedicated communications bridge to translate MCU UART  communications to the bq76PL455A-Q1 daisy chain. The bq76PL455 Bridge BoosterPack also offers  an isolated current sense input for measuring battery pack current, as (...)
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REFERENCE DESIGNS Download
Isolated IGBT Gate Driver Evaluation Platform for 3-Phase Inverter System Reference Design
TIDA-00195 — 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 of (...)
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REFERENCE DESIGNS Download
Reference Design to Measure AC Voltage & Current in Protection Relays w/Delta-Sigma Chip Diagnostics
TIDA-00810 — 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 Download
Shunt-Based 200A Peak Current Measurement Reference Design Using Isolation Amplifier
TIDA-00445 — The TIDA-00445 TI design provides a reference solution for isolated current measurement using shunt and isolated amplifier. By limiting the shunt voltage to 25mV, this design is able to reduce power dissipation in the shunt and achieves a high current measurement range of up to 200A. Shunt voltage (...)
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REFERENCE DESIGNS Download
Isolated Bias Supplies + Isolated Amplifier Combo for Line Voltage or Current Measurement
PMP9480 — 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 Download
Isolated Current Sensing Reference Design Solution, 5A, 2kV
TIPD121 — 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 (...)
document-generic Schematic document-generic User guide
Design files
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SOIC (DWV) 8 View options
SOP (DUB) 8 View options

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