SI8932B-ASR

Special Purpose Amplifiers Overview

The Skyworks SI8932B-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 accurate voltage sensing. The device operates with a nominal input range of 0 to 2.5 V and supports supply voltages from 3.0 V to 5.5 V. Key electrical specifications include a typical gain error of ±0.06%, a bandwidth of approximately 600 kHz, and a maximum operating temperature of +125 °C.

Special Purpose Amplifiers Feature Summary

• Automotive-grade qualification supporting AEC-Q100 standards and AIAG-compliant PPAP documentation
• High common-mode transient immunity ensuring accuracy in high-power switching environments
• Low signal delay and excellent drift characteristics for maintaining precision across the operating temperature range
• Fail-safe output mode that activates during high-side supply loss to simplify system diagnostics

Special Purpose Amplifiers Applications

• Automotive onboard chargers and battery management systems
• Industrial, hybrid electric vehicle (HEV), and renewable energy inverters
• AC, brushless, and DC motor controls and drives
• Isolated switch mode and uninterruptible power supplies (UPS)

Special Purpose Amplifiers Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm package type and insulation rating. Ensure compliance with moisture sensitivity level requirements during storage and soldering assembly. Confirm that the selected variant meets the necessary automotive quality standards and safety regulatory approvals for the intended application environment.

Special Purpose Amplifiers Selection Notes

Select this component when a single-ended output is required for isolated voltage sensing applications. The narrow-body SOIC package offers a compact footprint suitable for space-constrained designs. Consider the fail-safe feature for systems requiring safe state indication during power loss. Verify that the input voltage range and isolation requirements align with the system's operational parameters.

Special Purpose Amplifiers Part Context

The SI8932B-ASR belongs to the Si8932 family of isolated analog amplifiers designed for voltage-sensing applications. It provides a single-ended output proportional to the input voltage, distinguishing it from differential-output variants like the Si8931. The 'B' designation indicates a 2.5 kV RMS insulation rating, while the 'ASR' suffix specifies the narrow-body SOIC package and reel packaging configuration.

Special Purpose Amplifiers Replacement Considerations

SI8932B-IS: Wide-body SOIC package with identical electrical performance.

Special Purpose Amplifiers FAQ

What is the fail-safe output voltage when the high-side supply is lost?

When the high-side supply voltage (VDDA) is removed, the Si8932B-ASR enters a fail-safe mode with a nominal output voltage of approximately +2.8 V.

How does the Si8932B-ASR handle input signals exceeding its linear range?

The device has a specified linear input range of 0.25 V to 2.25 V. Signals up to 2.5 V are supported before clipping occurs, which limits the maximum output voltage.