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WM8988 Datasheet(PDF) 10 Page - Wolfson Microelectronics plc

Part # WM8988
Description  Stereo CODEC for Portable Audio Applications
PDF  56 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8988 Datasheet(HTML) 10 Page - Wolfson Microelectronics plc

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WM8988
Production Data
w
PD, Rev 4.0, October 2008
10
POWER CONSUMPTION
The power consumption of the WM8988 depends on the following factors.
•
Supply voltages: Reducing the supply voltages also reduces supply currents, and therefore results in significant power
savings, especially in the digital sections of the WM8988.
•
Operating mode: Significant power savings can be achieved by always disabling parts of the WM8988 that are not used
(e.g. mic pre-amps, unused outputs, DAC, ADC, etc.)
SCENARIO
DETAIL
AVDD
POWER
(MW)
HPVDD
POWER
(MW)
DCVDD
POWER
(MW)
DBVDD
POWER
(MW)
TOTAL
POWER
(MW)
OFF
Clocks Stopped
0.001
0.000
0.012
0.000
0.01
Playback to Lineout
0dB 1kHz
Sinusoid
4.9
1.2
4.8
0.4
11.3
Playback to Headphone 32ohm Quiescent
No Signal
4.7
1.0
4.7
0.4
10.3
Playback to Headphone 32ohm -50dB (near silence)
1kHz Sinusoid
4.6
1.1
4.8
0.4
10.9
Playback to Headphone 32ohm -21dB
(0.1mW/channel)
1kHz Sinusoid
4.6
4.9
4.8
0.4
14.7
Playback to Headphone 32ohm -9dB (2mW/channel)
1kHz Sinusoid
4.6
17.7
4.8
0.4
27.5
Table 1 Power Consumption for 2.4v / 1.8v Supplies
SCENARIO
DETAIL
AVDD
POWER
(MW)
HPVDD
POWER
(MW)
DCVDD
POWER
(MW)
DBVDD
POWER
(MW)
TOTAL
POWER
(MW)
OFF
Clocks Stopped
0.001
0.000
0.013
0.000
0.01
Playback to Lineout
0dB 1kHz
Sinusoid
7.6
2.0
4.9
0.4
14.9
Playback to Headphone 32ohm Quiescent
No Signal
7.6
1.8
4.9
0.4
14.7
Playback to Headphone 32ohm -50dB (near silence)
1kHz Sinusoid
7.6
1.8
4.8
0.4
14.6
Playback to Headphone 32ohm -24dB
(0.1mW/channel)
1kHz Sinusoid
7.6
5.9
4.8
0.4
18.7
Playback to Headphone 32ohm -11dB (2mW/channel)
1kHz Sinusoid
7.6
22.3
4.8
0.4
35.1
Table 2 Power Consumption for 3.0v / 1.8v Supplies
Notes:
1.
All figures are at TA = +25
oC, Slave Mode, fs = 48kHz, MCLK = 12.288 MHz (256fs),
2.
The power dissipated in the headphone is not included in the above table.



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