PCM3002_07 datasheet(31/39 Pages) BURR-BROWN

Part #	PCM3002

Description	16/20-BIT SINGLE-ENDED ANALOG INPUT/OUTPUT STEREO AUDIO CODECS

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Manufacturer	BURR-BROWN [Burr-Brown (TI)]

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PCM3003 DATA FORMAT CONTROL

Power-Down Control (Pin 7 and Pin 8)

De-Emphasis Control (Pin 17 and Pin 18)

20BIT Audio Data Selection (Pin 16)

PCM3002

PCM3003

SBAS079A – OCTOBER 2000 – REVISED OCTOBER 2004

res:

Bit 0: Reserved

This bit is reserved and should be set to 0.

The PCM3003 has hardware functional control using PDAD (pin 7) and PDDA (pin 8) for power-down control;

DEM0 (pin 18) and DEM1 (pin 17) for de-emphasis; and 20BIT (pin 16) for 16/20-bit format selection.

Both the ADC and DAC power-down control pins place the ADC or DAC section in the lowest

power-consumption mode. The ADC/DAC operation is stopped by cutting the supply current to the ADC/DAC

section. DOUT is fixed to zero during ADC power-down mode enable and VOUT is fixed to GND during DAC

power-down mode enable. Figure 46 illustrates the ADC and DAC output response for power-down ON/OFF.

PDAD

PDDA

POWER DOWN

Low

Reset (ADC/DAC power down enabled)

Low

High

ADC power-down/DAC operates

High

Low

ADC operates/DAC power down

High

ADC and DAC normal operation

DEM0 (pin 18) and DEM1 (pin 17) are used as de-emphasis control pins.

DEM1

DEMO

DE-EMPHASIS

Low

De-emphasis enabled for 44.1 kHz

Low

High

De-emphasis disabled

High

Low

De-emphasis enabled for 48 kHz

High

De-emphasis enabled for 32 kHz

20BIT

FORMAT

Low

ADC: 16-bit MSB-first, left-justified

DAC: 16-bit MSB-first, right-justified

High

ADC: 20-bit MSB-first, left-justified

DAC: 20-bit MSB-first, right-justified

31

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PCM3002 Datasheet(PDF) 31 Page - Burr-Brown (TI)

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