TAS5731MPHPR datasheet(27/68 Pages) TI1

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SCLK

32Clks

LRCLK(NoteReversedPhase)

LeftChannel

24-BitMode

20-BitMode

16-BitMode

MSB

LSB

32Clks

RightChannel

2-ChannelI S(PhilipsFormat)StereoInput

T0034-01

MSB

LSB

SCLK

TAS5731M

www.ti.com

SLOS838B – JULY 2013 – REVISED NOVEMBER 2013

PWM SECTION

The TAS5731M DAP device uses noise-shaping and customized nonlinear correction algorithms to achieve high

power efficiency and high-performance digital audio reproduction. The DAP uses a fourth-order noise shaper to

increase dynamic range and SNR in the audio band. The PWM section accepts 24-bit PCM data from the DAP

and outputs two BTL PWM audio output channels.

The PWM section has individual-channel dc-blocking filters that can be enabled and disabled. The filter cutoff

frequency is less than 1 Hz. Individual-channel de-emphasis filters for 44.1 kHz and 48 kHz are included and can

be enabled and disabled.

Finally, the PWM section has an adjustable maximum modulation limit of 93.8% to 99.2%.

For a detailed description of using audio processing features like DRC and EQ, see the User's Guide and

TAS570X GDE software development tool documentation.

SERIAL INTERFACE CONTROL AND TIMING

I2S Timing

I2S timing uses LRCLK to define when the data being transmitted is for the left channel and when it is for the

right channel. LRCLK is low for the left channel and high for the right channel. A bit clock running at 32, 48, or

64 × fS is used to clock in the data. There is a delay of one bit clock from the time the LRCLK signal changes

state to the first bit of data on the data lines. The data is written MSB-first and is valid on the rising edge of bit

clock. The DAP masks unused trailing data bit positions.

NOTE: All data presented in 2s-complement form with MSB first.

Figure 46. I2S 64-fS Format

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TAS5731MPHPR Datenblatt(PDF) 27 Page - Texas Instruments