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Texas Instruments ISO224 Precision Isolated Amplifier

Texas Instruments ISO224 Precision Isolated Amplifier comes 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 5kVRMS 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 ±10V signals that are widely used in industrial applications. The device operates off a single supply on the high side. This unique feature simplifies the design of the isolated power supply and reduces the system's cost. The integrated high-side supply voltage detection feature simplifies system-level diagnostics. The ±4V 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.

Features

  • Offered in high-grade (ISO224B) and low-grade (ISO224A) versions
  • ±12V Input voltage range optimized for isolated voltage measurement in industrial applications
  • Overvoltage input clamp with 9kV ESD
  • ±4V Differential output voltage range with common-mode at VDD2 / 2
  • Low DC-error operation (ISO224B)
    • Input offset of ±5mV at 25°C, ±15µV/°C (max.)
    • Gain error of ±0.3% at 25°C, ±35ppm/°C (max.)
    • Nonlinearity of ±0.01% (max.), ±0.1ppm/°C (typ.)
  • 4.5V to 18V Single-supply on high-side
  • 4.5V to 5.5V Operation on low-side
  • Safety-related certifications
    • 7071VPEAK Reinforced isolation per DIN VDE V 0884-11: 2017-01
    • 5000VRMS Isolation for 1 minute per UL1577
  • 80kV/µs (typ.) High CMTI (ISO224B)

Applications

  • Isolated analog signal acquisition in
    • Grid automation
    • Protection relays
    • Factory automation and control
    • Rail transport
    • Motor drives
    • Power analyzers

Evaluation Module

ISO224EVM Evaluation Module (EVM)

Texas Instruments ISO224EVM Evaluation Module (EVM)

Evaluation platform for the ISO224, a 7kV reinforced isolation amplifier.

Learn More關於Texas Instruments ISO224EVM Evaluation Module (EVM) View Products與Texas Instruments ISO224EVM Evaluation Module (EVM)相關

Functional Block Diagram

Block Diagram - Texas Instruments ISO224 Precision Isolated Amplifier
發佈日期: 2018-12-14 | 更新日期: 2023-07-24