Datasheet

TLV320AIC3110

SLAS647B –DECEMBER 2009–REVISED MAY 2012

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5.2.1.5 Software Power Down

By default, all circuit blocks are powered down following a reset condition. Hardware power up of each

circuit block can be controlled by writing to the appropriate control register. This approach allows the

lowest power-supply current for the functionality required. However, when a block is powered down, all of

the register settings are maintained as long as power is still being applied to the device.

5.2.2 Audio Analog I/O

The TLV320AIC3110 has a stereo audio DAC and a monaural ADC. It supports a wide range of analog

interfaces to support different headsets and analog outputs. The TLV320AIC3110 has features to interface

output drivers (8-Ω, 16-Ω, 32-Ω) and a microphone PGA with AGC control. A special circuit has also been

included in the TLV320AIC3110 to insert a short key-click sound into the stereo audio output. The key-

click sound is used to provide feedback to the user when a particular button is pressed or item is selected.

The specific sound of the keyclick can be adjusted by varying several register bits that control its

frequency, duration, and amplitude. See Key-Click Functionality With Digital Sine-Wave Generator

(PRB_P25), Section 5.5.5.

5.3 Digital Processing Low-Power Modes

The TLV320AIC3110 device can be tuned to minimize power dissipation, to maximize performance, or to

an operating point between the two extremes to best fit the application. The choice of processing blocks,

PRB_P1 to PRB_P25 for stereo playback and PRB_R4 to PRB_R18 for mono recording, also influences

the power consumption. In fact, the numerous processing blocks have been implemented to offer a choice

among configurations having a different balance of power-optimization and signal-processing capabilities.

5.3.1 ADC, Mono, 48 kHz, DVDD = 1.8 V, AVDD = 3.3 V

AOSR = 128, Processing Block = PRB_R4 (Decimation Filter A)

Power consumption = 9.01 mW

Table 5-1. PRB_R4 Alternative Processing Blocks, 9.01 mW

Processing Block Filter Estimated Power Change (mW)

PRB_R5 A 0.23

PRB_R6 A 0.22

AOSR = 64, Processing Block = PRB_R11 (Decimation Filter B)

Power consumption = 7.99 mW

Table 5-2. PRB_R11 Alternative Processing Blocks, 7.99 mW

Processing Block Filter Estimated Power Change (mW)

PRB_R4 A 0.43

PRB_R5 A 0.67

PRB_R6 A 0.66

PRB_R10 B –0.14

PRB_R12 B 0.04

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