SI8920BC-IS Description

The SI8920BC-IS is a galvanically isolated analog amplifier. The low-voltage differential input is ideal for measuring the voltage across a current shunt resistor or for any place where a sensor must be isolated from the control system. The output is a differential analog signal amplified by either 8.1x or 16.2x. The very low signal delay of the SI8920BC-IS allows control systems to respond quickly to fault conditions or changes in load. Low offset and gain drift ensure that accuracy is maintained over the entire operating temperature range.

SI8920BC-IS Features

Low voltage differential input -±100 mV and ±200 mV options

Low signal delay: 0.75 µs

Input offset: 0.2 mV

Gain error: <0.5%

Excellent drift specifications

 -1 µV/°C offset drift

 -10 ppm/°C gain drift

Nonlinearity: 0.025% full-scale

Low noise: 0.10 mVrms over 100 kHz bandwidth

High common-mode transient immunity: 75kV/µs

Compact packages

 -16-pin wide-body SOIC

 -8-pin surface mount DIP

–40 to 125 °C

AEC-Q100

SI8920BC-IS Applications

Industrial and renewable energy inverters

AC, Brushless, and DC motor controls and drives

Variable speed motor control in consumer white goods

Isolated switch mode and UPS power supplies

Hybrid and EV traction inverters

Onboard chargers

Charging pedestals