SI8946AD-AS4R

Power Management - Specialized Overview

The SI8946AD-AS4R is an automotive-grade isolated delta-sigma modulator (DSM) designed for high-precision current shunt measurement applications. It features a specified linear input range of 62.5 mV and integrates an internal 10 MHz DSM clock, eliminating the need for external timing components. The device utilizes wide body SOIC-8 packaging to ensure robust isolation performance. It operates within a supply voltage range of 3 V to 5.5 V and supports surface-mount installation. The component is supplied in a reel format with a factory pack quantity of 1250 units, suitable for automated manufacturing processes.

Power Management - Specialized Feature Summary

• Integrates an internal 10 MHz delta-sigma modulator clock for simplified system design
• Provides a specified linear input range of 62.5 mV for accurate current sensing
• Features wide body SOIC-8 packaging to enhance isolation reliability

Power Management - Specialized Applications

• Automotive current shunt measurement systems
• High-voltage motor control feedback loops
• Industrial power monitoring circuits

Power Management - Specialized Procurement Notes

Verify the specific suffix AS4R corresponds to the reel packaging variant when ordering. Confirm that the wide body SOIC-8 footprint matches the target PCB layout constraints. Ensure the 10 MHz internal clock frequency aligns with the downstream ADC sampling requirements. Check for any recent product change notifications regarding material composition or pinout modifications before finalizing the bill of materials.

Power Management - Specialized Selection Notes

Select this component when an integrated clock source is required to reduce external BOM complexity. The 62.5 mV input range is optimal for low-side or high-side shunt measurements with small voltage drops. The wide body package offers superior creepage and clearance distances compared to standard packages. Consider the 10 MHz modulation rate against the noise filtering capabilities of the subsequent digital interface.

Power Management - Specialized Part Context

This part belongs to the Si8946 series of isolated delta-sigma modulators from Skyworks Solutions. The series is engineered for automotive and industrial environments requiring galvanic isolation between the analog front-end and digital processing sections. The SI8946AD variant specifically denotes the wide body package option, distinguishing it from narrow body counterparts like the SI8946AB.

Power Management - Specialized Replacement Considerations

The SI8946BB-AS serves as a related family member but may differ in package type or clock specifications. Verify pin compatibility and electrical parameters before substituting. No direct public substitute part numbers are confirmed for this specific wide body reel variant.