PCM1606ESLASH2K datasheet(13/28 Pages) TI1

13 / 28 page

PCM1606

SLES014B − OCTOBER 2001 − REVISED AUGUST 2002

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functional description (continued)

VCOM output

One unbuffered common-mode voltage output pin, VCOM (pin 14) is brought out for decoupling purposes. This

pin is nominally biased to a dc voltage level equal to VCC/2. If this pin is to be used to bias external circuitry, a

voltage follower is required for buffering purposes. Figure 8 shows an example of using the VCOM pin for external

biasing applications.

PCM1606

BIAS [

VCOM

OPA337

−

µF

Figure 8. Biasing External Circuits Using the VCOM Pin

zero flag

zero detect condition

Zero detection for each output channel is independent from the others. If the data for a given channel remains

at a 0 level for 1024 sample periods (or LRCK clock periods), a zero detect condition exists for that channel.

zero output flag

When the data for all channels remains at a 0 level for 1024 sample periods (or LRCK clock periods), the ZEROA

(pin 6) is set to a logic 1 state. The zero flag pin can be used to operate external mute circuits, or used as a status

indicator for a microcontroller, audio signal processor, or other digitally controlled functions.

PCM1606E/2K Datasheet(PDF) 13 Page - Texas Instruments