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ISO224

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±12-V input, precision voltage sensing reinforced isolated amplifier

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Data sheet

ISO224

ACTIVE
Data sheet Order now

Product details

Device type Voltage sensing Peak-to-peak input voltage range (V) 12 Isolation rating Reinforced Withstand isolation voltage (VISO) (Vrms) 5000 Working isolation voltage (VIOWM) (Vrms) 1500 Transient isolation voltage (VIOTM) (VPK) 7000 CMTI (min) (kV/µs) 15, 55 Creepage (min) (mm) 8.5 Clearance (min) (mm) 8.5 Input offset (±) (max) (V) 0.005, 0.05 Input offset drift (±) (typ) (µV/°C) 3, 12 Rating Catalog Operating temperature range (°C) -55 to 125
Device type Voltage sensing Peak-to-peak input voltage range (V) 12 Isolation rating Reinforced Withstand isolation voltage (VISO) (Vrms) 5000 Working isolation voltage (VIOWM) (Vrms) 1500 Transient isolation voltage (VIOTM) (VPK) 7000 CMTI (min) (kV/µs) 15, 55 Creepage (min) (mm) 8.5 Clearance (min) (mm) 8.5 Input offset (±) (max) (V) 0.005, 0.05 Input offset drift (±) (typ) (µV/°C) 3, 12 Rating Catalog Operating temperature range (°C) -55 to 125
SOIC (DWV) 8 67.275 mm² (5.85 mm × 11.5 mm)
  • 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)
  • 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)

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.

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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* Data sheet ISO224 Reinforced Isolated Amplifier With Single-Ended Input of ±12 V and Differential Output of ±4 V datasheet (Rev. A) PDF | HTML Oct 31, 2018
Certificate VDE Certificate for Reinforced Isolation for DIN EN IEC 60747-17 (Rev. AB) Jul 15, 2026
Application note Introduction to HVDC Architecture and Solutions for Control and Protection (Rev. C) PDF | HTML May 19, 2026
Circuit design ±480V Isolated Voltage-Sensing Circuit with Differential Output (Rev. A) PDF | HTML Jun 21, 2024
Circuit design ±12-V Voltage Sensing Circuit With an Isolated Amplifier and Pseudo-Differential (Rev. A) Jun 12, 2024
Circuit design ±12-V voltage sensing circuit with an isolated amplifier and differential input (Rev. A) PDF | HTML Jun 6, 2024
White paper Comparing Isolated Amplifiers and Isolated Modulators (Rev. B) PDF | HTML Jun 4, 2024
Application brief Interfacing a Differential-Output (Isolated) Amp to a Single-Ended Input ADC (Rev. B) PDF | HTML Jun 2, 2023
Application brief Shunt Resistor Selection for Isolated Data Converters PDF | HTML May 4, 2023
White paper Best in Class Radiated Emissions EMI Performance with Isolated Amplifiers (Rev. A) PDF | HTML Mar 15, 2023
Certificate UL Certificate of Compliance Vol4 Sec5 E181974 (Rev. A) Jan 23, 2023
Application brief ±12-V Input, Next-Generation, Reinforced Isolated Amplifier for Voltage Sensing (Rev. A) PDF | HTML Aug 15, 2022
Application note ISO224 Fail-Safe Output Feature Sep 24, 2018

Design & development

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

Evaluation board

ISO224EVM — ISO224 evaluation module

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 (...)

User guide: PDF
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Support software

SBAC213 — Source Files for SBAA312

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Support software

SBAC232 — Source files for SBAA321

Supported products & hardware
Simulation model

ISO224 TINA-TI Reference Design

SBAM387.TSC (56 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

ISO224 TINA-TI Spice Model

SBAM386.ZIP (8 KB) - TINA-TI Spice model
Supported products & hardware
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.
Supported products & hardware
Calculation tool

SBAR020 — Isolated Amplifier Current Sensing Excel Calculator

This calculator provides estimates of the errors associated with using isolation amplifier devices in a current sensing configuration.
Supported products & hardware
Design tool

SBAC226 — Source files for SBAA317

Supported products & hardware
Reference design

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 (...)
Supported products & hardware
Reference design

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 (...)

Supported products & hardware
Reference design

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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SOIC (DWV) 8 Ultra Librarian
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