WM8941 datasheet(13/96 Pages) WOLFSON

13 / 96 page

Pre Production

WM8941

PP, Rev 3.3, December 2007

Typical current consumption for various scenarios is shown below.

MODE

AVDD

(3V3)

SPKVDD

(3V3)

VBVDD

(3V3)

DVDD

(1.8V)

TOTAL

POWER

(MW)

Power OFF (No Clocks)

0.038

0.125

Sleep (VMID maintained, No Clocks)

0.190

0.627

Mono Record (MIC input, +20dB gain, 8kHz,

quiescent) SLAVE

4.1

0.3

14.2

Mono Record (MIC input, +20dB gain, 44.1kHz, PLL,

quiescent) MASTER

5.3

2.1

21.1

Mono 16Ω HP Playback (0.1mW, 1kHz sine wave, ac

coupled) SLAVE

2.8

1.5

1.6

17.1

Mono 8Ω BTL speaker Playback (44.1kHz, 200mW,

1kHz sine wave) SLAVE

2.8

62.0 *

1.6

216.8 *

Mono 8Ω BTL speaker Playback (44.1kHz, PLL,

quiescent) MASTER

3.9

1.5

1.9

21.2

Mono 8Ω BTL speaker Playback (44.1kHz, PLL,

quiescent) MASTER and Video Buffer (0dB gain,

unloaded, quiescent)

3.9

1.5

4.8

1.9

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)

2.8

62.0 *

22.0

1.6

289.3 *

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)

2.8

62.0 *

23.7

1.6

294.9 *

Table 1 Power Consumption

Note: Power consumption figures include any power dissipated in the load (e.g. in the headphone or speaker)

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