WM8987LGECOSLASHV datasheet(8/58 Pages) WOLFSON

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WM8987L

Pre-Production

PP Rev 3.0 January 2007

TYPICAL PERFORMANCE

POWER CONSUMPTION

The power consumption of the WM8987L 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 WM8987L.

•

Operating mode: Significant power savings can be achieved by always disabling parts of the WM8987L that are not

used (e.g. mic pre-amps, unused outputs, DAC, ADC, etc.)

Control Register

R23Other settings

Tot. Power

Code

Bit

I (mA)

POF-01

OFF

00 00000 0100000000000 11

Clocks stopped

3.3 0.000 3.3 0.010

3.3 0.000 3.3 0.000

0.033

POF-02

2.7 0.000 2.0 0.007

2.5 0.000 2.7

0.000

0.014

POF-03

1.8 0.000 1.5 0.007

1.8 0.000 1.8

0.000

0.011

PST-01

Standby

10 10000 0100000000000 11

Interface Stopped

3.3

0.482 3.3

0.011

3.3 0.000 3.3 0.000

1.627

PST-02

(500 KOhm VMID string)

2.7 0.310 2.0 0.008

2.5 0.000 2.7

0.000

0.853

PST-03

1.8 0.184 1.5 0.007

1.8 0.000 1.8

0.000

0.342

PPB-01

BTL Headset Stereo Playback

01 10000 0011111111111 11

3.32.5733.3 4.601

3.3 0.248 3.3 4.291

38.653

PPB-02

0.1mW/channel into 32 Ohm load

2.7 2.052 2.0 2.371

2.5 0.175 2.7

4.314

22.368

PPB-03

1.8 1.297 1.5 1.750

1.8 0.119 1.8

3.879

12.156

PPS-01

Single-ended Headset Stereo Playback

01 10000 0011011000011 11

3.3

2.23 2 3.3

4.662

3.3 0.248 3.3 2.005

30.185

PPS-02

0.1mW/channel into 32 Ohm load

2.7 1.778 2.0 2.411

2.5 0.175 2.7

2.021

15.517

PPS-03

1.8 1.126 1.5 1.758

1.8 0.119 1.8

1.856

8.219

PPC-01

Single-ended Headset Stereo Playback

01 10000 0011011010011 11

3.3

2.229 3.3

4.662 3.3

0.248 3.3

4.007

36.782

PPC-02

(capless mode using OUT3)

2.7 1.776 2.0

2.408 2.5 0.175 2.7

4.007

20.868

PPC-03

0.1mW/channel into 32 Ohm load

1.8 1.126 1.5

1.757 1.8 0.119 1.8

3.674

11.490

PRD-01

Differential mono mic record

01 11010 1000000000011 11

LINSEL=11

3.3

3.551 3.3

4.883

3.3 0.298 3.3 0.000

28.816

PRD-02

(LINPUT1-RINPUT1)

LMICBOOST=10

2.7 3.077 2.0 2.255

2.5 0.213

2.7

0.000

13.350

PRD-03

DATSEL=01

1.8 2.388 1.5 1.584

1.8 0.148 1.8

0.000

6.941

PRS-01

Single-ended mono mic record

01 11010 1000000000011 11

LMICBOOST=10

3.3

3.196 3.3

4.888

3.3 0.295 3.3 0.000

27.651

PRS-02

(from LINPUT1)

DATSEL=01

2.7 2.799 2.0 2.270

2.5 0.212 2.7

0.000

12.627

PRS-03

1.8 2.221 1.5 1.588

1.8 0.146 1.8

0.000

6.643

PRL-01

Single-ended stereo line record

01 11111 0000000000011 11

3.3

4.53 2 3.3

4.917

3.3 0.287 3.3 0.000

32.129

PRL-02

(from L/RINPUT1)

2.7 4.037 2.0 2.281

2.5 0.206 2.7

0.000

15.977

PRL-03

1.8 3.313 1.5 1.605

1.8 0.142 1.8

0.000

8.627

PDL-01

Simultaneous record and playback

01 11111 0011011000011 11

3.3

6.295 3.3

7.836

3.3 0.286 3.3 0.679

49.817

PDL-02

(stereo, line-in / line-out)

2.7 5.454 2.0 3.837

2.5 0.206 2.7

0.711

24.835

PDL-03

1.8 4.212 1.5 2.760

1.8 0.142 1.8

0.364

12.632

R25 (19h)

DCVDD

DBVDD

HPVDD

R26 (1Ah)

AVDD

R24 (18h)

Table 1 Typical Supply Current Consumption

Notes:

All figures are at TA = +25

oC, Slave Mode, fs = 48kHz, MCLK = 12.288 MHz (256fs), with zero signal (quiescent)

The power dissipated in the headphone or speaker is not included in the above table.

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