The microphone bias characteristics include:
■ Power supply:
■ CSR8635 QFN microphone supply is VBAT or 3V3_USB
■ Minimum input voltage = Output voltage + drop-out voltage
■ Maximum input voltage is 4.3V
■ Drop-out voltage:
■ 300mV maximum
■ Output voltage:
■ 1.8V or 2.6V
■ Tolerance 90% to 110%
■ Output current:
■ 70μA to 2.8mA
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C3
LINE_AP
C4
LINE_AN
Figure 9.6: Single-ended Input
9.2.15 Output Stage
The output stage digital circuitry converts the signal from 16-bit per sample, linear PCM of variable sampling frequency
to bit stream, which is fed into the analogue output circuitry.
Production Information
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