Isolated Monitoring ADC

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The Si8901 series of isolated monitoring ADCs are useful as linear signal galvanic isolators, level shifters, and/or ground loop eliminators in many applications including power-delivery systems and solar inverters. These devices integrate a 10-bit SAR ADC subsystem, supervisory state machine and isolated UART (Si8900), I²C/SMbus port (Si8901), or SPI Port (Si8902) in a single package. Based on Silicon Labs’ proprietary CMOS isolation technology, ordering options include a choice of 2.5 or 5 kV isolation ratings. All products are safety certified by UL, CSA, and VDE. The Si8901 devices offer a typical common-mode transient immunity performance of 45 kV/μs for robust performance in noisy and high-voltage environments. Devices in this family are available in 16-pin SOIC wide-body packages.

• Isolated data acquisition
• AC mains monitor
• Solar inverters
• Isolated temp/humidity sensing
• Switch mode power systems
• Telemetry

Safety Approval:
• UL 1577 recognized
- Up to 5 kVrms for 1 minute
• CSA component notice 5A
- IEC 60950, 62368, 60601
• VDE certification conformity
- VDE 0884-10

Symmetry Electronics is an authorized Silicon Labs distributor.


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- 3 input channels
- 10-bit resolution
- 2.5 s conversion time
Isolated serial I/O port
- UART (Si8900)
- IC/SMbus (Si8901)
- 2 MHz SPI port (Si8902)
Transient immunity: 45 kV/s (typ)
Temperature range: 40 to +85 C
>60-year life at rated working voltage
CSA component notice 5A approval
IEC 60950, 62368, 60601
VDE 0884-10
UL1577 recognized
- Up to 5 kVrms for 1 minute

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Isolated Monitoring ADC
Part #: SI8901D-A02-GS
Isolated Monitoring ADC