WM8971LEFLSLASHR datasheet(12/56 Pages) WOLFSON

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WM8971L

Advanced Information

AI Rev 3.0 March 2004

POWER CONSUMPTION

The power consumption of the WM8971L 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 WM8971L.

•

Operating mode: Significant power savings can be achieved by always disabling parts of the WM8971L 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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 1.5 0.0029 1.8 0.0000

0.0233

Standby

10 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 1.5 0.0030 1.8 0.0000

0.3771

Playback to Line-out

01 1 0 0 0 0 0 1 1 0 0 1 1 0 0 0 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 1.5 0.1240 1.8 0.1500

7.0536

Playback to Line-out

01 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 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 1.5 0.1240 1.8 0.4130

6.7647

Playback to 16 Ohm Headphone 01 1 0 0 0 0 0 1 1 1 1 0 0 0 0 0 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 1.5 0.1240 1.8 0.4150

7.5465

Playback to 8 Ohm BTL Speaker 01 1 0 0 0 0 0 1 1 0 0 1 1 0 0 0 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 1.5 0.1240 1.8 0.1510

7.2663

Headphone Amp

01 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 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 1.5 0.0030 1.8 0.4100

2.4360

Speaker Amp

01 1 0 0 0 0 0 0 0 0 0 1 1 0 0 0 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 1.5 0.0030 1.8 0.1760

2.1156

Phone Call

01 1 0 0 0 0 1 0 0 0 0 1 1 1 0 0 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 1.5 0.0030 1.8 0.2240

2.7492

Record from Line-in

01 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 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 1.5 0.1350 1.8 0.0000

15.7575

Record from Line-in

01 1 1 1 1 1 0 0 0 0 0 0 0 0 1 0 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 1.5 0.1350 1.8 0.0000

9.5295

Record from mono microphone

01 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 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 1.5 0.1370 1.8 0.0000

10.2333

Stereo Record & Playback

01 1 1 1 1 1 1 1 1 0 0 1 1 0 0 0 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 1.5 0.1320 1.8 0.1480

19.8597

Stereo Record & Playback

01 1 1 1 1 1 1 1 1 0 0 1 1 0 1 1 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 1.5 0.1320 1.8 0.1490

13.9962

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.

WM8971LEFL/R 数据表(PDF) 12 Page - Wolfson Microelectronics plc

WM8971LEFL/R 数据表(HTML) 12 Page - Wolfson Microelectronics plc

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WM8971LEFL/R 数据表(PDF) 12 Page - Wolfson Microelectronics plc

WM8971LEFL/R 数据表(HTML) 12 Page - Wolfson Microelectronics plc

Html Pages

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