2.5 kV isolated monitoring ADC

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The Si8900/1/2 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 Si8900/1/2 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.

Symmetry Electronics is an authorized Silicon Labs distributor.


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3 input channels
10-bit resolution
2 s conversion time
Isolated serial I/O port
UART (Si8900)
I2C/SMbus (Si8901)
2.5 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, 61010, 60601
VDE/IEC 60747-5-2
UL1577 recognized
Up to 5 kVrms for 1 minute


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Silicon Labs
Isolation Voltage
2.5 kVrms
Silicon Laboratories
Maximum Data Rate
240 kb/s
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Number of Channels
3 Channel
Propagation Delay Time
0.3 ms
Supply Current
13.3 mA
Supply Voltage - Max
3.6 V
Supply Voltage - Min
2.7 V

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2.5 kV isolated monitoring ADC
Part #: Si8901B-A01-GS
2.5 kV isolated monitoring ADC