Electronic Component Solutions

Isolated Analog to Digital Converters

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.

  • ADC
    3 input channels
    10-bit resolution
    2 µs conversion time
  • Isolated serial I/O port
    UART (Si8900)
    I2C/SMbus (Si8901)
    2.5 MHz SPI port (Si8902)
  • Transient immunity:
    45 kV/µs (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

SI8900