SDAA088 September   2025 AMC0100R , AMC0311R , AMC0311R-Q1 , AMC0330D , AMC0330R , AMC0330R-Q1 , AMC0330S , AMC0336

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Pairing Ratiometric Output Isolation Amplifier With ADC
    1. 2.1 Test Setup
    2. 2.2 REFIN Voltage Tracking
    3. 2.3 Ratiometric Configuration Noise Rejection
    4. 2.4 Spurious-Free Dynamic Range
    5. 2.5 Transient Response of REFIN to VOUT
    6. 2.6 Transfer Function of REFIN to VOUT
  6. 3Summary
  7. 4References

2.2 REFIN Voltage Tracking

Figure 2-3 illustrates how the output of the AMC0330R device tracks the REFIN voltage. The input signal is 10-kHz sinewave with 1V amplitude. The reference voltage applied to the REFIN pin is 1kHz triangular wave with a 3V DC offset and a 300mV peak-to-peak ripple, which corresponds to 10% of the DC offset.

Ratiometric Output Voltage Tracking REFIN Figure 2-3 Ratiometric Output Voltage Tracking REFIN