SI8901B-A02-GSR

ADCs/DACs - Special Purpose Overview

The SI8901B-A02-GSR is a 10-bit isolated monitoring Analog-to-Digital Converter (ADC) from Skyworks Solutions. It integrates a three-channel SAR ADC subsystem with an I2C/SMBus serial port for data transmission. The device provides galvanic isolation based on CMOS technology, supporting up to 5 kVrms isolation voltage. Key electrical parameters include a 2.5 µs conversion time, 240 kbps maximum I2C bit rate, and operation within a -40°C to +85°C temperature range. Power supply requirements are 2.7 V to 3.6 V for the input side (VDDA) and 2.7 V to 5.5 V for the output side (VDDB).

ADCs/DACs - Special Purpose Feature Summary

• Integrated 10-bit SAR ADC with three single-ended analog input channels.
• On-chip I2C/SMBus serial interface operating at speeds up to 240 kbps.
• CMOS-based isolation providing up to 5 kVrms working voltage rating.
• Programmable Gain Amplifier (PGA) with selectable 1x or 0.5x gain settings.

ADCs/DACs - Special Purpose Applications

• Isolated data acquisition systems.
• AC mains monitoring applications.
• Solar inverter signal conditioning.
• Switch mode power supply feedback loops.

ADCs/DACs - Special Purpose Procurement Notes

Verify component authenticity through authorized Skyworks distributors. Confirm package integrity as the device utilizes a 16-pin Wide Body SOIC format. Check manufacturing date codes against current production status, as specific revision suffixes may indicate process changes. Ensure storage conditions comply with moisture sensitivity level requirements prior to soldering.

ADCs/DACs - Special Purpose Selection Notes

Select this model when an I2C or SMBus master controller requires isolated ADC functionality. Choose the 'B' isolation rating variant if the application demands up to 5 kVrms isolation rather than the standard 2.5 kV option. Verify that the system logic levels align with the 2.7–5.5 V output supply range. Consider the 16-pin SOIC footprint constraints during PCB layout design.

ADCs/DACs - Special Purpose Part Context

This component belongs to the Si8900/1/2 family of isolated monitoring ADCs. The Si8901 variant specifically distinguishes itself by utilizing an I2C/SMBus interface, whereas the Si8900 uses UART and the Si8902 employs SPI. All variants share identical ADC performance metrics and isolation architecture but differ in communication protocol and pinout assignments.

ADCs/DACs - Special Purpose Replacement Considerations

Direct functional replacements within the same family include the SI8901B-A01-GS (2.5 kV isolation) or SI8901D-A02-GS (5 kV isolation, tube packaging). Cross-family substitution with other isolated ADCs requires careful evaluation of pin compatibility, isolation voltage ratings, and serial protocol timing differences.