Si8920

Si8920 ISOLATED AMPLIFIER FOR CURRENT SHUNT MEASUREMENT 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 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 to 125 °C  AEC-Q100 Applications  Industrial, HEV 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 Safety Approvals (Pending)  UL 1577 recognized Up to 5000 Vrms for 1 minute  CSA component notice 5A approval  VDE certification conformity VDE0884 Part 10 (basic/reinforced insulation)  CQC certification approval GB4943.1 Description The Si8920 is a galvanically isolated analog amplifier. The low-voltage differential input is ideal for measuring 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 Si8920 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 rang...