Si8941 Datasheet

Si8941 Isolated Delta-Sigma Modulator

The Si8941/46/47 are galvanically isolated delta-sigma modulators which output a digital signal proportional to the voltage level at the input. The low-voltage differential input is ideal for measuring voltage across a current shunt resistor or for any place where a sensor must be isolated from the .

Features

• Low voltage differential input - ±62.5 mV and ±250 mV options
• Modulator clock options - External clock up to 25 MHz (Si8941) - 10 MHz internal clock (Si8946) - 20 MHz internal clock (Si8947)
• Typical input offset: ±50 µV
• Typical gain error: ±0.05%
• Excellent drift specifications - ±0.5 µV/°C typical offset drift - ±4 ppm/°C typical gain drift
• Typical 14-bit (ENOB) precision
• High common-mode transient immunity: 75 kV/µs
• Typical SNR: 90 dB
• Typical THD:
  –97 dB
• Automotive-grade OPNs available - AEC-Q100 qualification - AIAG-compliant PPAP documentation support - IMDS and CAMDS li.