Texas Instruments PCM6 0Q1EVM-PDK Series, User Manual, Page: 10 / 67

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10 SBAU341B – January 2020 – Revised June 2020
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PCM6xx0Q1EVM-PDK Evaluation Module
2.2.1.1 AC-Coupled Line Input Biasing
The default values for the input bias resistors have been optimized to support full-scale input, however if a
lower input swing is used and higher input impedance desired, these bias resistors can be replaced with
optimized values.
Table 3 lists the recommended values for these resistors. For lower input swing, the
PGA is required to reach full-scale input.
Table 3. Recommended AC-Coupled Line Input Bias Resistor Values
Input Type Input Swing MICBIAS Voltage
Recommended Bias Resistor
for AC-Coupled Input
Differential
10 V
RMS
9 V 4.7 k Ω
2 V
RMS
9 V 150 k Ω
7 V 110 k Ω
5 V 62 k
Ω
Single-ended
5 V
RMS
9 V 4.3 k Ω
1 V
RMS
9 V 47 k Ω
7 V 30 k Ω
5 V 15 k Ω