TSC2117 datasheet(24/192 Pages) TI

24 / 192 page

5.3.1

Software

5.4 Digital Processing Low-Power Modes

5.4.1

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

5.4.2

ADC, Mono, 8 kHz, DVDD = 1.8 V, AVDD = 3.3 V

TSC2117

Low-Power Audio Codec With Embedded miniDSP, Stereo Class-D

Speaker Amplifier, and Smart Four-Wire Touch-Screen Controller

SLAS550A – APRIL 2009 – REVISED JUNE 2009

www.ti.com

Software development for the TSC2117 is supported through TI's comprehensive PurePath™ Studio

software development environment, a powerful, easy-to-use tool designed specifically to simplify software

development on Texas Instruments miniDSP audio platforms. The graphical development environment

consists of a library of common audio functions that can be dragged and dropped into an audio signal flow

and graphically connected together. The DSP code can then be assembled from the graphical signal flow

with the click of a mouse.

See the TSC2117 product folder on www.ti.com to learn more about PurePath Studio and the latest status

on available, ready-to-use DSP algorithms.

The TSC2117 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.

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

0.23

PRB_R6

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

0.43

PRB_R5

0.67

PRB_R6

0.66

PRB_R10

–0.14

PRB_R12

0.04

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

Power consumption = 6.77 mW

Table 5-3. PRB_R4 Alternative Processing Blocks, 6.77 mW

Processing Block

Filter

Estimated Power Change (mW)

PRB_R5

0.03

PRB_R6

0.03

APPLICATION INFORMATION

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