TAS2553_15 datasheet(45/58 Pages) TI

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IN-

VBAT

IN+

OUT-

OUT+

ADDR

PVDD

VBOOST

L2 (opt.)

I2C

I2S

IOVDD

10 nF

22 2F

VREG

VSENSE-

VSENSE+

2.2 2H

1 2F

Audio

Input

BIAS

3.0 V À 5.5 V

AGND

1 2F

L3 (opt.)

Speaker

AVDD

IVCLKIN

PGND

0.1 2F

10 2F

1 nF

(opt.)

1 nF

(opt.)

0.1 2F

1.65 V À 1.95 V

1.5 V À

3.6 V

2C Address Select

Enable

PDM Clock

(opt.)

2C Interface

2S Interface

0.1 2F

TAS2553

www.ti.com

SLAS978B – SEPTEMBER 2013 – REVISED FEBRUARY 2014

8.2.2 Typical Application - Analog Audio Input

Using the analog audio input is very similar to the digital audio input case in Typical Application - Digital Audio

Input, and this section will only discuss the differences from the digital input configuration.

Figure 56. Typical Application Schematic

8.2.2.1 Design Requirements

Table 13. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Audio Input

Analog

Current and Voltage Data Stream

Digital Audio, I2S

Mono or Stereo Configuration

Mono

Max Output Power at 1% THD+N

2.8

8.2.2.2 Detailed Design Procedure

8.2.2.2.1

Audio Input/Output

In this application, system considerations require the use of an analog audio input. Note that a digital audio

interface, such as I2S, still needs to be connected to send current and voltage data from the TAS2553 to a

system processor.

The analog inputs to TAS2553 should be ac-coupled to the device terminals to allow decoupling of signal

source's common mode voltage with that of TAS2553's common mode voltage. The input coupling capacitor in

combination with the selected input impedance of TAS2553 forms a high-pass filter.

Fc = 1/(2*π*RinCc)

(3)

Cc = 1/(2*π*RinFc)

(4)

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