Pre-Production
WM8940
POWER CONSUMPTION
Typical current consumption for various scenarios is shown below.
DCVDD
(1.8V)
MA
DBVDD
(1.8V)
UA
TOTAL
POWER
(MW)
MODE
Power OFF (No Clocks)
AVDD
SPKVDD
(3V3) MA (3V3) MA
0.038
0.190
0
0
0
0
0.2
0.2
0.126
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
0.3
1.9
1.6
1.6
1.8
11
115
3.7
3.8
81
14.3
21.0
17.1
216.8
21.1
Mono Record (MIC input, +20dB gain, 44.1kHz,
PLL, quiescent) MASTER
0
Mono 16Ω Headphone Playback (0.1mW, 1kHz
sine wave, ac coupled) SLAVE
1.5
62
1.5
Mono 8Ω BTL speaker Playback (44.1kHz,
200mW, 1kHz sine wave) SLAVE
Mono 8Ω BTL speaker Playback (44.1kHz,
PLL, quiescent) MASTER
Table 1 Power Consumption
Note: Power consumption figures include any power dissipated in the load (e.g. in the headphone or speaker)
Pre-Production, Rev 3.0, February 2007
11
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
