TAS5036B datasheet(16/56 Pages) TI

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Architecture Overview

SLES073—February 2003

TAS5036B

2.1.5 PLL Filter

A low jitter PLL produces the internal timing of the TAS5036B (when in master mode), the master clock, SCLK,

and LRCLK. Connections for the PLL external loop filter are provided through PLL_FLT_OUT and

PLL_FLT_RET as shown in Figure 2–2.

PLL_FLT_OUT

TAS5036B

PLL_FLT_RET

220

Ω

47 nF

4.7 nF

Figure 2–2. External PLL Loop Filter

2.1.6 DCLK

DCLK is the internal high frequency clock that is produced by the PLL circuitry from MCLK. The TAS5036B

uses the DCLK to control all internal operations. DCLK is 8 times the speed of MCLK in normal speed mode,

4 times MCLK in double speed, and 2 times MCLK in quad speed. With respect to the I2C addressable

registers, DCLK clock cycles are used to specify interchannel delay and to detect when the MCLK frequency

is drifting. Table 2–4 DCLK shows the relationship between Sample Rate, MCLK, and DCLK.

Table 2–4. DCLK

(kHz)

MCLK

(MHz)

DCLK

(MHz)

DCK Period

(ns)

8.1920

65.5360

15.3

44.1

11.2896

90.3168

11.1

12.2880

98.3040

10.2

22.5280

90.1120

11.1

24.5760

98.3040

10.2

192

49.1520

98.3040

10.2

2.1.7 Serial Data Interface

The TAS5036B operates as a slave only/receive only serial data interface in all modes. The TAS5036B has

three PCM serial data interfaces to accept six channels of digital data though the SDIN1, SDIN2, SDIN3 inputs.

The serial audio data is in MSB first; 2s complement format.

The serial data interfaces of the TAS5036B can be configured in right justified, I2S, left-justified, or DSP modes.

This interface supports 32-kHz, 44.1-kHz, 48-kHz, 88-kHz, 96-kHz, 176.4-kHz, and 192-kHz data sample

rates. The serial data interface format is specified using the data interface control register. The supported word

lengths are shown in Table 2–5.

During normal operating conditions if the serial data interface settings change state, an error recovery

sequence is initiated.

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