WM8988 Просмотр технического описания (PDF) - Wolfson Microelectronics plc
Номер в каталоге
Компоненты Описание
производитель
WM8988 Datasheet PDF : 56 Pages
| |||
WM8988
Production Data
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
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)
Clocks Stopped
0dB 1kHz
Sinusoid
No Signal
1kHz Sinusoid
1kHz Sinusoid
1kHz Sinusoid
Table 1 Power Consumption for 2.4v / 1.8v Supplies
AVDD HPVDD DCVDD DBVDD TOTAL
POWER POWER POWER POWER POWER
(MW) (MW) (MW) (MW) (MW)
0.001 0.000 0.012 0.000 0.01
4.9
1.2
4.8
0.4
11.3
4.7
1.0
4.7
0.4
10.3
4.6
1.1
4.8
0.4
10.9
4.6
4.9
4.8
0.4
14.7
4.6
17.7
4.8
0.4
27.5
SCENARIO
DETAIL
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)
Clocks Stopped
0dB 1kHz
Sinusoid
No Signal
1kHz Sinusoid
1kHz Sinusoid
1kHz Sinusoid
Table 2 Power Consumption for 3.0v / 1.8v Supplies
AVDD HPVDD DCVDD DBVDD TOTAL
POWER POWER POWER POWER POWER
(MW) (MW) (MW) (MW) (MW)
0.001 0.000 0.013 0.000 0.01
7.6
2.0
4.9
0.4
14.9
7.6
1.8
4.9
0.4
14.7
7.6
1.8
4.8
0.4
14.6
7.6
5.9
4.8
0.4
18.7
7.6
22.3
4.8
0.4
35.1
Notes:
1. All figures are at TA = +25oC, Slave Mode, fs = 48kHz, MCLK = 12.288 MHz (256fs),
2. The power dissipated in the headphone is not included in the above table.
w
PD, Rev 4.0, October 2008
10
Share Link: 