SI8947BB-IS

Power Management - Specialized Overview

The SI8947BB-IS is an automotive-grade isolated delta-sigma modulator designed for high-precision current shunt measurement applications. It features a specified linear input range of 250 mV and integrates an internal 20 MHz DSM clock to simplify system design. The device operates within a supply voltage range of 3 V to 5.5 V, drawing a typical operating supply current of 6.6 mA. It provides robust galvanic isolation with a rating of 5.0 kVrms, ensuring safety in high-voltage environments. The component supports both high-side and low-side sensing configurations and functions reliably across an extended industrial temperature range from -40°C to +125°C.

Power Management - Specialized Feature Summary

• Integrates an internal 20 MHz delta-sigma modulator clock for simplified external circuitry
• Supports flexible high-side and low-side current sensing topologies
• Provides 5.0 kVrms basic isolation rating for enhanced safety compliance

Power Management - Specialized Applications

• Automotive battery management systems
• Electric vehicle motor control drives
• Industrial power monitoring equipment

Power Management - Specialized Procurement Notes

Verify the specific suffix against official Skyworks documentation to confirm package type and tape-and-reel specifications. Ensure the selected variant meets the required isolation voltage ratings for your target application. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm that the automotive qualification status aligns with your project's reliability standards before finalizing procurement.

Power Management - Specialized Selection Notes

Select this component when designing systems requiring precise current measurement with integrated digital isolation. The internal clock eliminates the need for external oscillators, reducing board space and component count. Consider the 250 mV input range compatibility with standard shunt resistors. Evaluate the 5.0 kVrms isolation barrier against system safety requirements. Ensure the SOIC-8 package dimensions fit the available PCB footprint constraints.

Power Management - Specialized Part Context

This device belongs to the Si8947 family of isolated analog front-end solutions. It combines a precision amplifier stage with a delta-sigma modulator to digitize analog signals directly across the isolation barrier. This architecture reduces noise susceptibility compared to traditional analog isolators. The family targets demanding automotive and industrial applications where signal integrity and safety are critical.

Power Management - Specialized Replacement Considerations

Publicly confirmed substitute part numbers for SI8947BB-IS are not available in the provided source material.