Pre Production
WM8941
Typical current consumption for various scenarios is shown below.
AVDD
(3V3)
MA
SPKVDD
(3V3)
VBVDD
(3V3)
MA
DVDD
(1.8V)
MA
TOTAL
POWER
(MW)
MODE
MA
Power OFF (No Clocks)
0.038
0.190
0
0
0
0
0
0
0.125
0.627
Sleep (VMID maintained, No Clocks)
Mono Record (MIC input, +20dB gain, 8kHz,
quiescent) SLAVE
4.1
5.3
2.8
2.8
3.9
0
0
0
0
0
0
0
0.3
2.1
1.6
1.6
1.9
14.2
21.1
Mono Record (MIC input, +20dB gain, 44.1kHz, PLL,
quiescent) MASTER
Mono 16Ω HP Playback (0.1mW, 1kHz sine wave, ac
coupled) SLAVE
1.5
62.0 *
1.5
17.1
Mono 8Ω BTL speaker Playback (44.1kHz, 200mW,
1kHz sine wave) SLAVE
216.8 *
21.2
Mono 8Ω BTL speaker Playback (44.1kHz, PLL,
quiescent) MASTER
Mono 8Ω BTL speaker Playback (44.1kHz, PLL,
quiescent) MASTER and Video Buffer (0dB gain,
unloaded, quiescent)
3.9
2.8
2.8
1.5
4.8
1.9
1.6
1.6
36.9
Mono 8Ω BTL speaker Playback (44.1kHz, 200mW,
1kHz sine wave) SLAVE and Video Buffer (1Vpp
Multiburst, AC coupled, Clamp Enabled, 0dB gain, 75Ω
load)
62.0 *
62.0 *
22.0
23.7
289.3 *
294.9 *
Mono 8Ω BTL speaker Playback (44.1kHz, 200mW,
1kHz sine wave) SLAVE and Video Buffer (0.5Vpp
Multiburst, AC coupled, Clamp enabled, +6dB gain,
75Ω load)
Table 1 Power Consumption
Note: Power consumption figures include any power dissipated in the load (e.g. in the headphone or speaker)
PP, Rev 3.3, December 2007
13
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
