SI8922BD-IS4

Special Purpose Amplifiers Overview

The SI8922BD-IS4 is a galvanically isolated analog amplifier from the Si8922 series, designed for low-voltage differential input measurement. It features a single-ended output with a fixed gain of 8.2x and a specified linear input range of ±250 mV. The device supports an input supply voltage (VDDA) and output supply voltage (VDDB) ranging from 3.0 V to 5.5 V. It provides up to 5.0 kVRMS isolation withstand voltage per UL1577 and operates within an ambient temperature range of -40 °C to +125 °C.

Special Purpose Amplifiers Feature Summary

• Galvanic isolation utilizing CMOS technology for high common-mode transient immunity
• Low signal delay enabling rapid control system response to load changes
• Fail-safe output mode activates automatically upon loss of input-side power supply
• Automotive-grade manufacturing flow available with AEC-Q100 qualification support

Special Purpose Amplifiers Applications

• Current shunt measurement in industrial inverters
• High-efficiency vehicle (HEV) and renewable energy inverter systems
• AC, brushless, and DC motor controls and drives
• Isolated switch mode and UPS power supplies
• Automotive onboard chargers and battery management systems

Special Purpose Amplifiers Procurement Notes

Verify that the specific ordering suffix matches the required insulation rating and package type. Confirm compliance with moisture sensitivity level requirements during storage and soldering processes. Ensure the selected variant aligns with automotive qualification standards if applicable to the target application environment.

Special Purpose Amplifiers Selection Notes

Select this component when a single-ended analog output is required for current sensing applications. The ±250 mV input range accommodates higher resistance shunts compared to lower-range variants. Verify that the 8.2x gain factor meets the dynamic range requirements of the downstream analog-to-digital converter or control interface.

Special Purpose Amplifiers Part Context

This part belongs to the Skyworks Si8921/Si8922 family of isolated amplifiers. While the Si8921 provides a differential output, the Si8922 variant delivers a single-ended output. Both share identical isolation barriers and input specifications but differ in output topology to suit different system integration needs.

Special Purpose Amplifiers Replacement Considerations

SI8922AD-IS4