wm8988 Wolfson Microelectronics plc, wm8988 Datasheet - Page 10

• Manufacturer Part Number: wm8988
• Description: Stereo Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8988
w
POWER CONSUMPTION
The power consumption of the WM8988 depends on the following factors.
•
•
OFF
Playback to Lineout
Playback to Headphone 32ohm Quiescent
Playback to Headphone 32ohm -50dB (near silence)
Playback to Headphone 32ohm -21dB
(0.1mW/channel)
Playback to Headphone 32ohm -9dB (2mW/channel)
Table 1 Power Consumption for 2.4v / 1.8v Supplies
OFF
Playback to Lineout
Playback to Headphone 32ohm Quiescent
Playback to Headphone 32ohm -50dB (near silence)
Playback to Headphone 32ohm -24dB
(0.1mW/channel)
Playback to Headphone 32ohm -11dB (2mW/channel)
Table 2 Power Consumption for 3.0v / 1.8v Supplies
Notes:
1.
2.
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.)
All figures are at T
The power dissipated in the headphone is not included in the above table.
SCENARIO
SCENARIO
A
= +25
o
C, Slave Mode, fs = 48kHz, MCLK = 12.288 MHz (256fs),
Clocks Stopped
0dB 1kHz
Sinusoid
No Signal
1kHz Sinusoid
1kHz Sinusoid
1kHz Sinusoid
Clocks Stopped
0dB 1kHz
Sinusoid
No Signal
1kHz Sinusoid
1kHz Sinusoid
1kHz Sinusoid
DETAIL
DETAIL
POWER
POWER
AVDD
0.001
AVDD
0.001
(MW)
(MW)
4.9
4.7
4.6
4.6
4.6
7.6
7.6
7.6
7.6
7.6
POWER
POWER
HPVDD
HPVDD
0.000
0.000
(MW)
(MW)
17.7
22.3
1.2
1.0
1.1
4.9
2.0
1.8
1.8
5.9
POWER
DCVDD
POWER
DCVDD
0.012
(MW)
0.013
(MW)
4.8
4.7
4.8
4.8
4.8
4.9
4.9
4.8
4.8
4.8
PD, Rev 4.0, October 2008
POWER
DBVDD
0.000
POWER
(MW)
DBVDD
0.4
0.4
0.4
0.4
0.4
0.000
(MW)
0.4
0.4
0.4
0.4
0.4
Production Data
POWER
TOTAL
(MW)
POWER
0.01
11.3
10.3
10.9
14.7
27.5
TOTAL
(MW)
0.01
14.9
14.7
14.6
18.7
35.1
10