Si890x Isolated ADC AC Mains Monitor

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 (pending). 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.

Features

  • Integrated 10-bit 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 5 A approval
    • IEC 60950, 61010, 60601
    • VDE/IEC 60747-5-2
    • UL1577 recognized
    • Up to 5 kV rms for 1 minute

Getting Started with Si890x AC Mains Monitors

Si890x Evaluation Kit

The easiest way to begin development with the isolated ADC AC mains monitor family is with the Si890x Evaluation Kit.

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Si890x Product Matrix

Devices
Part Number Data Sheet Evaluation Kit Package Type Temperature Range (°C) Output Mode Isolation Rating (kV rms) Full Scale Current (A) Initial Accuracy
Si890PWR-EVB WB SOIC16 -40 85 UART 2.5 10 0.10%
Si890PWR-EVB WB SOIC16 -40 85 UART 5 10 0.10%
Si890PWR-EVB WB SOIC16 -40 85 I2C/SMBus 2.5 10 0.10%
Si890PWR-EVB WB SOIC16 -40 85 I2C/SMBus 5 10 0.10%
Si890PWR-EVB WB SOIC16 -40 85 SPI 2.5 10 0.10%
Si890PWR-EVB WB SOIC16 -40 85 SPI 5 10 0.10%
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