PCM3008

SLAS332 – APRIL 2001

12

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function control

The PCM3008 has the following functions which are controlled by PDAD (pin 13), PDDA (pin 14), DEM0 (pin

6) and DEM1 (pin 7).

power-down control

PDAD: ADC power-down control pin places the ADC portion in the lowest power consumption mode. The ADC

operation is stopped by disabling the clock and bias to the ADC portion, and DOUT is forced to zero during ADC

power-down mode. Figure 7 illustrates the ADC DOUT response for ADC power-down ON/OFF. This does not

affect the DAC operation.

PDAD

ADC OPERATION MODE

Low

ADC power down mode enable

High

ADC power down mode disable

PDDA: DAC power-down control pin places the DAC portion in the lowest power consumption mode. The DAC

does not affect the ADC operation.

PDDA

DAC OPERATION MODE

Low

DAC power down mode enable

High

DAC power down mode disable

PDAD = low and PDDA = low places PCM3008 into reset state and either PDAD = high or PDDA = high returns

PCM3008 to operational state.

de-emphasis control

DEM1, DEM0: DAC de-emphasis control pins select the de-emphasis mode as shown below.

DEM1

DEM0

DE-EMPHASIS MODE

Low

Low

De-emphasis 44.1 kHz ON

Low

High

De-emphasis OFF

High

Low

De-emphasis 48 kHz ON

High

High

De-emphasis 32 kHz ON