WM8753L
Advanced Information
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.
MODE DESCRIPTION
POWER CONSUMPTION
MIN
TYP
32
MAX
UNITS
mW
mW
mW
mW
mW
mW
All active (PCM, Stereo Mic, Stereo H/P Playback)
Headphone Playback Only
36
Line-Out Playback Only
36
Line Record Only (0dB gain)
Mic Record Only (29dB gain boost, ALC active)
Standby
34
39
1.65
Table 1 Power Consumption
Notes:
1. AVDD, HPVDD, DBVDD, DCVDD = 3.3V, TA = +25oC, fs = 48kHz
2. All channels are stereo.
3. All figures are quiescent, with no signal.
4. The power dissipated in the headphone itself is not included in the above table.
AI Rev 3.1 June 2004
11
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
