SI8931D-IS4R

Special Purpose Amplifiers Overview

The SI8931D-IS4R is a galvanically isolated analog amplifier from Skyworks Solutions, featuring a single channel with differential output. It operates on a 3 V to 5.5 V supply and delivers a 600 kHz bandwidth. The device provides a 5 kVrms isolation rating via CMOS technology. Key electrical parameters include a typical input offset of 0.16 mV, gain error of ±0.06%, and signal delay of 1 µs. It supports an operating temperature range from -40 °C to +125 °C.

Special Purpose Amplifiers Feature Summary

• CMOS-based galvanic isolation barrier supporting up to 5.0 kVrms withstand voltage
• High common-mode transient immunity for accurate measurements in high-power switching environments
• Low signal delay and excellent linearity with low offset and gain drift
• Fail-safe output mode activates automatically upon loss of the high-side supply voltage

Special Purpose Amplifiers Applications

• 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)
• Automotive onboard chargers and battery management systems

Special Purpose Amplifiers Procurement Notes

Verify that the ordering suffix 'R' corresponds to the reel packaging format as specified in the manufacturer's documentation. Confirm the specific insulation rating associated with the 'D' suffix matches the required system isolation standards. Ensure compatibility with the narrow-body SOIC-8 package dimensions during PCB layout planning.

Special Purpose Amplifiers Selection Notes

Select this component when differential analog output is required for direct connection to ADCs. Verify that the 0 to 2.5 V nominal input range aligns with the sensor or voltage divider configuration. Consider the 600 kHz bandwidth and 1 µs signal delay for timing-sensitive control loops.

Special Purpose Amplifiers Part Context

This part belongs to the Si8931/Si8932 family of isolated analog amplifiers. The Si8931 variant specifically provides a differential output, whereas the Si8932 offers a single-ended output. Both share similar electrical characteristics and isolation technologies but differ in output topology.

Special Purpose Amplifiers Replacement Considerations

SI8931D-IS4