WM8753LEBSLASHV datasheet(11/87 Pages) WOLFSON

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WM8753L

Advanced Information

AI Rev 3.1 June 2004

POWER CONSUMPTION

The power consumption of the WM8753L depends on the following factors.

Supply voltages: Reducing the supply voltages also reduces supply currents, and therefore results in

significant power savings.

Operating mode: Power consumption is lower in mono modes than in stereo, as one ADC / DAC /

PGA is switched OFF. It is also reduced when the device is used for playback only (ADC off) or for

recording only (DAC off). Unused outputs should be switched off (for example, when line out is not

used, do not enable the LINE outputs).

Headphone volume: At high volume, the power dissipated in the headphone itself is greater than the

power consumption of the WM8753L. High headphone volume also increases the power consumption

of the on-chip headphone drivers.

POWER CONSUMPTION

MODE DESCRIPTION

MIN

TYP

MAX

UNITS

All active (PCM, Stereo Mic, Stereo H/P Playback)

Headphone Playback Only

Line-Out Playback Only

Line Record Only (0dB gain)

Mic Record Only (29dB gain boost, ALC active)

Standby

1.65

Table 1 Power Consumption

Notes:

AVDD, HPVDD, DBVDD, DCVDD = 3.3V, TA = +25oC, fs = 48kHz

All channels are stereo.

All figures are quiescent, with no signal.

The power dissipated in the headphone itself is not included in the above table.

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