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[FAQ] TLV320ADC3101: Voltage Measurement Transfer Function

Part Number: TLV320ADC3101
Other Parts Discussed in Thread: TLV320ADC3100


What is the transfer function relationship between the input voltage applied to the TLV320ADC3101 and TLV320ADC3100 devices and the resulting output codes?

  • Hello,

    Here is a visual to help represent the ideal transfer function of the TLV320ADC3101.  The full-scale input level is 0.707Vrms or 2Vpp ideally, but there will be non-zero gain errors that will shift the curve from part-to-part.  The TLV320ADC3101 is specified with a single-ended gain error of 0.7dB typical and there will be a roughly +/-0.5dB distribution around that center value.

    The output codes in I2S are standard binary two's complement formatted.