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Product details

Parameters

Input range (Vp-p) ±12 Isolation working voltage VIOWM (rms) (V) 1500 Isolation transient overvoltage VIOTM (peak) (V) 7000 CMTI (Min) (kV/µs) 15, 55 Input offset (+/-) (Max) (mV) 50, 5 Input offset drift (+/-) (Typ) (uV/C) 12, 3 Gain error (+/-) (Max) (%) 1, 0.3 Gain error drift (+/-) (Typ) (ppm/°C) 20, 10 Gain non-linearity (+/-) (Max) (%) 0.02, 0.01 Small signal bandwidth (Typ) (kHz) 185, 275 Rating Catalog Operating temperature range (C) -55 to 125 open-in-new Find other Isolated amplifiers

Package | Pins | Size

SOIC (DWV) 8 67 mm² 5.85 x 11.5 open-in-new Find other Isolated amplifiers

Features

  • Offered in High-Grade (ISO224B) and Low-Grade (ISO224A) Versions
  • ±12-V Input Voltage Range Optimized for Isolated Voltage Measurement in Industrial Applications
  • Overvoltage Input Clamp With 9-kV ESD
  • ±4-V Differential Output Voltage Range With Common-Mode at VDD2 / 2
  • Low DC-Error Operation (ISO224B):
    • Input Offset: ±5 mV at 25°C, ±15 µV/°C max
    • Gain Error: ±0.3% at 25°C, ±35 ppm/°C max
    • Nonlinearity: ±0.01% max, ±0.1 ppm/°C typ
  • 4.5-V to 18-V Single-Supply on High-Side
  • 4.5-V to 5.5-V Operation on Low-Side
  • Safety-Related Certifications:
    • 7071-VPEAK Reinforced Isolation per DIN VDE V 0884-11: 2017-01
    • 5000-VRMS Isolation for 1 Minute per UL1577
  • High CMTI (ISO224B): 80 kV/µs (typ)

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Description

The ISO224 is a precision isolated amplifier with an output separated from the input circuitry by an isolation barrier with high immunity to magnetic interference. This barrier is certified to provide reinforced galvanic isolation of up to 5 kVRMS with an exceptionally long lifetime and low power dissipation. When used with isolated power supplies, this device separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage devices from damage.

The input of the ISO224 is optimized for accurate sensing of ±10-V signals that are widely used in industrial applications. The device operates of a single supply on the high-side. This unique feature simplifies the design of the isolated power supply and reduces the system cost. The integrated high-side supply voltage detection feature simplifies system level diagnostics. The ±4-V output of the ISO224 allows lower-cost analog-to-digital converters (ADCs) to be used. The differential structure of the output supports high immunity to noise.

The ISO224 is fully specified over the extended industrial temperature range of –55°C to +125°C and is available in a wide-body 8-pin SOIC (DWV) package.




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Technical documentation

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Type Title Date
* Datasheet ISO224 Reinforced Isolated Amplifier With Single-Ended Input of ±12 V and Differential Output of ±4 V datasheet (Rev. A) Oct. 31, 2018
White papers Best in Class Radiated Emissions EMI Perf. with AMC1300B-Q1 Isolated Amplifier Jun. 29, 2020
Application notes Introduction to HVDC Architecture and Solutions for Control and Protection (Rev. A) Jun. 01, 2020
Technical articles Isolation 101: How to find the right isolation solution for your application Feb. 11, 2020
Application notes ±480-V isolated voltage-sensing circuit with differential output Jan. 24, 2019
Application notes ±12-V Voltage Sensing Circuit With an Isolated Amplifier and Pseudo-Differential Dec. 20, 2018
More literature Nonoptical Isolating Devices UL 1577 Certificate of Compliance (Rev. B) Nov. 26, 2018
Technical articles Chief Technology Officer Ahmad Bahai discusses isolation in a world of collaboration Oct. 02, 2018
Application notes ±12-V Input, Next-Generation, Reinforced Isolated Amplifier for Voltage Sensing Sep. 28, 2018
Application notes ISO224 Fail-Safe Output Feature Sep. 24, 2018
Application notes ±12-V voltage sensing circuit with an isolated amplifier and differential input Sep. 20, 2018
User guides ISO224EVM User's Guide Jun. 12, 2018
Technical articles Why capacitive isolation: a vital building block for sensors in smart cities Jan. 16, 2018
Technical articles The top trends in high-voltage power, from isolation to wide-bandgap technologies Dec. 06, 2017

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
49
Description

The ISO224 evaluation module (EVM) is an evaluation platform for ISO224, which is a 7-kV reinforced isolation amplifier designed for use in voltage-measuring applications. ISO224EVM allows the user to explore all the features of the ISO224 device. ISO224EVM also features a bipolar and (...)

Features
  • Reinforced isolation amplifier: 7-kV peak, 10-kV surge
  • Fixed gain of 0.25
  • ±12-V input range
  • Low gain error and drift
  • Extended industrial temperature range

Software development

SUPPORT SOFTWARE Download
SBAC213.ZIP (60 KB)
SUPPORT SOFTWARE Download
SBAC232.ZIP (36 KB)

Design tools & simulation

SIMULATION MODELS Download
SBAM386.ZIP (8 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBAM387.TSC (56 KB) - TINA-TI Reference Design
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
DESIGN TOOLS Download
SBAC226.ZIP (99 KB)

Reference designs

REFERENCE DESIGNS Download
High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design
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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
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 (...)
document-generic Schematic document-generic User guide
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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOIC (DWV) 8 View options

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