Precision isolated amplifier for isolated analog signal acquisition

10-01-2019 | Texas Instruments | Power

Texas Instruments ISO224 Precision Isolated Amplifier arrives with an output divided from the input circuitry by an isolation barrier with high immunity to magnetic interference. This barrier is certified to give reinforced galvanic isolation of up to 5kVRMS with an especially long lifetime and low power dissipation. When applied with isolated power supplies, this device splits parts of the system that runs on different common-mode voltage levels and protects lower-voltage devices from damage.

The input of the device is optimised for accurate sensing of ±10V signals that are extensively used in industrial applications. The device works off a single supply on the high-side. This unique characteristic simplifies the design of the isolated power supply and lessens the system cost. The integrated high-side supply voltage detection feature simplifies system level diagnostics. The ±4V output of the device enables lower-cost ADCs to be used. The differential structure of the output supports high immunity to noise.

Typical applications include grid automation, protection relays, factory automation and control, rail transport, motor drives, and power analysers.

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