Datasheet

ADC3101 Control Software

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The Input Volume Control tab allows the user to change the PGA gain (analog domain) and the ADC gain

(digital domain). Also available is an ADC Phase Compensation block. MICBIAS1 and MICBAS2 controls

are included on this tab.

Figure 9. Audio Inputs Panel

4.1.3.2 Automatic Gain Control (AGC)

To use the AGC feature, double-click the AGC text in the Panel Selection Tree. When the application pops

up Figure 10, select OK to program the TLV320ADC3101 for the AGC feature. Otherwise, select Cancel.

The left-channel automatic gain control (AGC) can be enabled by checking the Enable Left AGC box

(Figure 11). Pressing the Capture Audio button records the left-channel audio. Its corresponding data is

displayed in the audio capture graph window. The small white window located at the bottom right of the

AGC tab displays the audio waveform of the recorded data. Ensure that the AIC32x4 EVM is selected as

the computer's default audio capture device before pressing this button. To set the TLV320ADC3101-K as

the default audio device, open the Windows™ Control Panel → Sounds and Audio Devices Properties and

set the AIC32x4 EVM as the default audio recording device. Also, do not use any other media player or

audio recording software while the control software is recording.

Figure 10. Program Device for This Feature

TLV320ADC3101-K SLAU267A–December 2008–Revised October 2012

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