TAS3208IPZPR datasheet(21/79 Pages) TI1

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TAS3208

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SLES201E

– JANUARY 2007 – REVISED MARCH 2011

Analog Audio Interface

The TAS3208 is has ten analog stereo inputs that are multiplexed to one ADC. Additionally, the TAS3208 has

one line output that can source any of the ten analog stereo inputs.

The TAS3208 has three stereo DACs. The outputs of of DAC3 are designed to be used as a 24-mW headphone

amplifier or line driver. The other two DAC outputs are configured as stereo line drivers.

Both the ADC and DAC blocks can be placed in power down when not used.

Figure 16 shows a block diagram of the analog interface.

Stereo Analog-to-Digital Converter (ADC)

The TAS3208 has an analog 10:1 input multiplexer and an 11:1 output multiplexer. These can accept analog

stereo inputs up to 1 Vrms. The outputs of the multiplexers are the stereo ADC and the line output.

The ADC supports a sampling rate of 48 kHz in clock master mode. In clock slave mode, 32-, 44.1-, and 48-kHz

sampling frequencies are supported, based on the master clock frequency.

Stereo Digital-to-Analog Converters (DACs)

The TAS3208 has three stereo DACs. Each DAC can operate a maximum of 48 kHz. The DACs provide a

48-kHz sampling frequency in master mode. In slave mode, 32-, 44.1-, and 48-kHz sampling frequencies are

supported, based on the master clock frequency. Two of the DACs are configured for providing line outputs. One

of the stereo DACs has the capability to drive either a line out or to be used as a headphone (HP) amplifier.

The stereo HP amplifier is designed to drive up to 24 mW per channel into a headphone speaker load of 16

Ω.

The headphone output is a single-ended configuration using series 16-

Ω resistors and ac-coupling capacitors.

The TAS3208 includes a multiplexed stereo line driver output. The input can be selected to use the output of the

stereo DAC or one of the ten sets of analog inputs. The line driver is capable of driving up to a 10-k

Ω load.

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