WM8973CLGEFLSLASHV datasheet(13/63 Pages) WOLFSON

13 / 63 page

Production Data

WM8973L

PD, Rev 4.5, December 2011

POWER CONSUMPTION

The power consumption of the WM8973L 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 WM8973L.



Operating mode: Significant power savings can be achieved by always disabling parts of the WM8973L that are not

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

Control Register

R23

Other settings

Tot. Power

Bit

I (mA)

OFF

00 000 000 000 0000 000 11

Clocks stopped

3.3 0.0016 3.3 0.0190 3.3 0.0080 3.3 0.0002

0.0950

2.5 0.0008 2.5 0.0170 2.5 0.0050 2.5 0.0000

0.0570

1.8 0.0005 1.5 0.0120 1.8 0.0350 1.8 0.0000

0.0819

Standby

10 100 000 000 0000 000 11

Interface Stopped

3.3 0.3900 3.3 0.0390 3.3 0.0080 3.3 0.0000

1.4421

(500 KOhm VMID string)

2.5 0.2880 2.5 0.0170 2.5 0.0050 2.5 0.0000

0.7750

1.8 0.1970 1.5 0.0120 1.8 0.0036 1.8 0.0000

0.3791

Playback to Line-out

01 100 000 110 0110 000 11

3.3 3.7310 3.3 5.6600 3.3 0.3000 3.3 0.2370

32.7624

2.5 2.6940 2.5 3.8600 2.5 0.2200 2.5 0.2100

17.4600

1.8 1.8820 1.5 2.1400 1.8 0.1488 1.8 0.1500

7.1354

Playback to Line-out

01 100 000 111 1000 001 11

3.3 3.5170 3.3 4.6470 3.3 0.3000 3.3 0.9500

31.0662

(64x oversampling mode)

2.5 2.5760 2.5 3.2030 2.5 0.2200 2.5 0.6480

16.6175

1.8 1.7760 1.5 1.7590 1.8 0.1488 1.8 0.4130

6.8465

Playback to 16 Ohm Headphone 01 100 000 111 1000 000 11

3.3 3.7260 3.3 5.6700 3.3 0.3000 3.3 0.9530

35.1417

2.5 2.7530 2.5 3.9250 2.5 0.2200 2.5 0.6570

18.8875

1.8 1.8900 1.5 2.1410 1.8 0.1488 1.8 0.4150

7.6283

Playback to 16 Ohm Headphone 01 100 000 111 1000 100 11

R24, OUT3SW=00

3.3 3.7060 3.3 5.6400 3.3 0.3000 3.3 1.4040

36.4650

(capless mode using OUT3)

2.5 2.7130 2.5 3.9000 2.5 0.2200 2.5 0.9600

19.4825

1.8 1.8870 1.5 2.1410 1.8 0.1488 1.8 0.6140

7.9811

Playback to 8 Ohm BTL Speaker 01 100 000 110 0110 000 11

R24, ROUT2INV=1

3.3 3.8820 3.3 5.6470 3.3 0.3000 3.3 0.2830

33.3696

2.5 2.8780 2.5 3.9390 2.5 0.2200 2.5 0.2100

18.1175

1.8 1.9800 1.5 2.1630 1.8 0.1488 1.8 0.1510

7.3481

Headphone Amp

01 100 000 001 1000 000 11

Clocks Stopped

3.3 1.8400 3.3 0.0200 3.3 0.0080 3.3 0.9540

9.3126

(line-in to 16 Ohm headphone)

2.5 1.3300 2.5 0.0190 2.5 0.0050 2.5 0.6400

4.9850

1.8 0.9300 1.5 0.0130 1.8 0.0036 1.8 0.4100

2.4380

Speaker Amp

01 100 000 000 0110 000 11

Clocks Stopped

3.3 1.9780 3.3 0.0200 3.3 0.0080 3.3 0.3310

7.7121

(line-in to 8 Ohm speaker)

R24, ROUT2INV=1

2.5 1.4300 2.5 0.0190 2.5 0.0050 2.5 0.2430

4.2425

1.8 0.9860 1.5 0.0130 1.8 0.0036 1.8 0.1760

2.1176

Phone Call

01 100 001 000 0111 000 11

Clocks Stopped

3.3 2.5230 3.3 0.0370 3.3 0.0080 3.3 0.4420

9.9330

(mono line-in to headphone,

2.5 1.8520 2.5 0.0190 2.5 0.0050 2.5 0.3200

5.4900

mic to MONOOUT)

1.8 1.2900 1.5 0.0130 1.8 0.0036 1.8 0.2240

2.7512

Record from Line-in

01 111 110 000 0000 000 11

3.3 8.6600 3.3 6.5700 3.3 0.3330 3.3 0.0000

51.3579

2.5 7.7100 2.5 4.2800 2.5 0.2320 2.5 0.0000

30.5550

1.8 6.8000 1.5 2.2100 1.8 0.1620 1.8 0.0000

15.8466

Record from Line-in

01 111 110 000 0000 010 11

3.3 5.0720 3.3 5.9100 3.3 0.3390 3.3 0.0000

37.3593

(64x oversampling mode)

2.5 4.2550 2.5 3.7500 2.5 0.2320 2.5 0.0000

20.5925

1.8 3.5900 1.5 1.9100 1.8 0.1620 1.8 0.0000

9.6186

Record from mono microphone

01 110 101 000 0000 000 11 R32, LMICBOOST=11; 3.3 4.9330 3.3 6.5400 3.3 0.3390 3.3 0.0000

38.9796

R23, DATSEL=01

2.5 4.2970 2.5 4.2500 2.5 0.2400 2.5 0.0000

21.9675

1.8 3.7210 1.5 2.2200 1.8 0.1644 1.8 0.0000

10.3237

Record from mono microphone

01 110 101 000 0000 000 11 R32, LMICBOOST=11; 3.3 5.2900 3.3 6.5000 3.3 0.3220 3.3 0.0000

39.9696

(differential)

R23, DATSEL=01;

2.5 4.5600 2.5 4.2700 2.5 0.2400 2.5 0.0000

22.6750

R32, LINSEL=11

1.8 3.9000 1.5 2.2200 1.8 0.1656 1.8 0.0000

10.6481

Stereo Record & Playback

01 111 111 110 0110 000 11

3.3 11.927 3.3 10.870 3.3 0.3320 3.3 0.2820

77.2563

2.5 10.112 2.5 7.3600 2.5 0.2340 2.5 0.2060

44.7800

1.8 7.3910 1.5 4.0610 1.8 0.1584 1.8 0.1480

19.9468

Stereo Record & Playback

01 111 111 110 0110 011 11

3.3 8.1090 3.3 9.3300 3.3 0.3330 3.3 0.2820

59.5782

(64x oversampling mode)

2.5 6.5500 2.5 6.3020 2.5 0.2340 2.5 0.2070

33.2325

1.8 4.7000 1.5 3.3800 1.8 0.1584 1.8 0.1490

14.0833

DBVDD

HPVDD

R24

R25 (19h)

R26 (1Ah)

AVDD

DCVDD

Table 1 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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