SI8922BB-ASR

Special Purpose Amplifiers Overview

The Skyworks SI8922BB-ASR is an automotive-grade, galvanically isolated analog amplifier featuring a single-ended output. It utilizes proprietary CMOS isolation technology to provide high common-mode transient immunity and low signal delay for precise current shunt measurements. The device accepts differential inputs with a specified linear range of ±250 mV and amplifies the signal by a fixed gain of 8.2x. Designed for harsh environments, it operates within a temperature range of -40°C to +125°C and supports up to 5.0 kVRMS withstand voltage per UL1577.

Special Purpose Amplifiers Feature Summary

• Automotive-grade qualification supporting AIAG-compliant PPAP documentation
• Galvanic isolation using CMOS technology for high reliability
• Fail-safe output mode activates upon loss of input supply voltage
• Low-voltage differential input optimized for current shunt sensing

Special Purpose Amplifiers Applications

• Automotive onboard chargers and battery management systems
• Industrial and HEV inverters
• AC, brushless, and DC motor controls and drives
• Isolated switch mode and UPS power supplies

Special Purpose Amplifiers Procurement Notes

Verify that the specific ordering suffix matches the required insulation rating and package type. Confirm compliance with automotive quality standards such as AEC-Q100 if applicable to the design. Ensure proper handling procedures are followed due to moisture sensitivity level ratings. Cross-reference safety certifications like UL1577 and VDE requirements against system specifications before finalizing procurement.

Special Purpose Amplifiers Selection Notes

Select this component when a single-ended output is required for isolated current sensing applications. The ±250 mV input range suits higher resistance shunts compared to lower range options. Verify that the narrow body SOIC package fits the PCB layout constraints. Consider the 8.2x fixed gain factor when designing the downstream ADC interface or signal conditioning circuitry.

Special Purpose Amplifiers Part Context

This part belongs to the Si8922 series of isolated amplifiers from Skyworks Solutions. It shares the same core isolation architecture and pinout as other variants in the family but differs in input range and output configuration. The 'B' designation indicates the ±250 mV input range, while 'S' denotes the narrow body SOIC package.

Special Purpose Amplifiers Replacement Considerations

Direct substitutes include SI8922BD-IS4 and SI8922AD-IS4, which offer similar functionality with potentially different insulation ratings or input ranges.