Si8920 Isolated Amplifier

The Silicon Labs Si8920 is a galvanically isolated analog amplifier ideal for measuring voltage across a current shunt resistor or for any place where a sensor must be isolated from the control system. Our amplifier family offers low voltage and differential input while providing higher performance, reduced variation with temperature and age, tighter part-to-part matching, and longer lifetimes compared to other isolation technologies.

The  very low signal delay of the Si8920 allows control systems to respond quickly to fault conditions or changes in load. Low offset and gain drift ensure accuracy is maintained over the entire operating temperature range. Exceptionally high common mode transient immunity enables the Si8920 to deliver accurate measurements even in the presence of high power switching, such as in motor drive system or inverter applications.

The Si8920 isolated amplifier utilizes our proprietary isolation technology and supports up to 5.0 kVrms withstand voltage per UL1577. The output is a differential analog signal amplified by either 8.1x or 16.2x.

Features

  • Low voltage differential input
    • ±100 mV and ±200 mV options
  • Low signal delay: 0.75 µs
  • Input referred offset: 0.2 mV
  • Gain error: <0.5%
  • Excellent drift specifications
    • 1 µV/°C offset drift
    • 60 ppm/°C gain drift
  • Nonlinearity: 0.1 % full-scale
  • Low noise: 0.10 mVrms over 100 kHz bandwidth
  • High common mode transient immunity: 75 kV/ µs
  • Compact packages:
    • 16-pin wide-body SOIC
    • 8-pin surface mount DIP
  • -40°C to 125°C
  • AEC-Q100

Get Started with Si8920 Isolated Amplifier

Si8920 Evaluation Kit

The easiest way to begin development with the Si8920 is with the Si8920 Isolated Amplifier Evaluation Kit.

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Si8920 Product Matrix

Status
Devices
Part Number Data Sheet Evaluation Kit Package Type Temperature Range (°C) Output Mode Isolation Rating Initial Accuracy
Si8920ISO-KIT GW DIP8 -40 125 Analog 3.75 1.50%
Si8920ISO-KIT WB SOIC16 -40 125 Analog 5 1.50%
Si8920ISO-KIT GW DIP8 -40 125 Analog 3.75 0.75%
Si8920ISO-KIT WB SOIC16 -40 125 Analog 5 0.75%
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