Photo Amplifiers | FOD7840

±2 V, Fully Differential Optical Coupled Isolation Amplifier

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Overview

The FOD7840x is a family of optically-coupled isolation amplifiers. Each device consists of a gallium aluminum arsenide (GaAlAs) light emitting diode and a highly accurate sigma-delta A/D converter on the input side and a precise D/A converter with differential output on the output side. This optocoupler is used for current sensing in motor drives or general-purpose current sensing and monitoring. This family offers various gain tolerances: FOD7840A (±1% gain tolerance) and the FOD7840B (±3% gain tolerance) and FOD7840 (±5% gain tolerance).

  • Current Sensing and Monitoring
  • Analog Signal Isolation
  • Motor Phase and Rail Current Sensing
  • Switched Mode Power Supply Signal Isolation
  • Motor drives
  • Frequency inverters
  • High-voltage switched mode power supplies
  • Advanced Sigma-Delta A/D Converter Technology
  • Fully Differential Circuit Topology
  • 100 kHz Bandwidth
  • Low gain drift over temperature
  • Low non-linearity
  • 15 kV/µs minimum CMTI
  • UL 1577 and IEC 60747-5-5 certification pending

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