WM8972L Просмотр технического описания (PDF) - Wolfson Microelectronics plc

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WM8972L

Mono CODEC for Portable Audio Applications

Wolfson Microelectronics plc 

WM8972L

POWER CONSUMPTION

Preliminary Technical Data

The power consumption of the WM8972L 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 WM8972L.

• Operating mode: Significant power savings can be achieved by always disabling parts of the WM8972L that are not

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

Control Register

R25 (19h) R26 (1Ah) R24 R23 Other settings

AVDD

DCVDD DBVDD HPVDD Tot. Power

Bit

V I (mA) V I (mA) V I (mA) V I (mA)

OFF

00 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

01

2.5 0.0008 2.5 0.0170 2.5 0.0050 2.5 0.0000

00

1.8 0.0005 1.5 0.0120 1.5 0.0029 1.8 0.0000

Standby

10 1 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

(500 KOhm VMID string)

01

2.5 0.2880 2.5 0.0170 2.5 0.0050 2.5 0.0000

00

1.8 0.1970 1.5 0.0120 1.5 0.0030 1.8 0.0000

Playback to 8 Ohm BTL Speaker 01 1 0 0 0 1 1 1 0 0 0 0 11 R24, OUTINV=1 3.3 TBD 3.3 TBD 3.3 TBD 3.3 TBD

01

2.5 TBD 2.5 TBD 2.5 TBD 2.5 TBD

00

1.8 TBD 1.5 TBD 1.5 TBD 1.8 TBD

Speaker Amp

01 1 0 0 0 0 1 1 0 0 0 0 11 Clocks Stopped 3.3 1.9780 3.3 0.0200 3.3 0.0080 3.3 0.3310

(line-in to 8 Ohm speaker)

01 R24, OUTINV=1 2.5 1.4300 2.5 0.0190 2.5 0.0050 2.5 0.2430

00

1.8 0.9860 1.5 0.0130 1.5 0.0030 1.8 0.1760

Phone Call

01 1 0 0 1 0 1 1 1 0 0 0 11 Clocks Stopped 3.3 2.5230 3.3 0.0370 3.3 0.0080 3.3 0.4420

(mono line-in to headphone,

01

2.5 1.8520 2.5 0.0190 2.5 0.0050 2.5 0.3200

mic to MONOOUT)

00

1.8 1.2900 1.5 0.0130 1.5 0.0030 1.8 0.2240

Record from Line-in

01 1 1 1 0 0 0 0 0 0 0 0 11

3.3 TBD 3.3 TBD 3.3 TBD 3.3 TBD

01

2.5 TBD 2.5 TBD 2.5 TBD 2.5 TBD

00

1.8 TBD 1.5 TBD 1.5 TBD 1.8 TBD

Record from Line-in

01 1 1 1 0 0 0 0 0 0 1 0 11

3.3 TBD 3.3 TBD 3.3 TBD 3.3 TBD

(64x oversampling mode)

01

2.5 TBD 2.5 TBD 2.5 TBD 2.5 TBD

00

1.8 TBD 1.5 TBD 1.5 TBD 1.8 TBD

Record from mono microphone 01 1 1 1 1 0 0 0 0 0 0 0 11 R32, MICBOOST=11; 3.3 4.9330 3.3 6.5400 3.3 0.3390 3.3 0.0000

01 R23, DATSEL=01 2.5 4.2970 2.5 4.2500 2.5 0.2400 2.5 0.0000

00

1.8 3.7210 1.5 2.2200 1.5 0.1370 1.8 0.0000

Record from mono microphone 01 1 1 1 1 0 0 0 0 0 0 0 11 R32, MICBOOST=11; 3.3 5.2900 3.3 6.5000 3.3 0.3220 3.3 0.0000

(differential)

01 R23, DATSEL=01; 2.5 4.5600 2.5 4.2700 2.5 0.2400 2.5 0.0000

00 R32, INSEL=11 1.8 3.9000 1.5 2.2200 1.5 0.1380 1.8 0.0000

Record & Playback

01 1 1 1 1 1 1 1 0 0 0 0 11

3.3 TBD 3.3 TBD 3.3 TBD 3.3 TBD

01

2.5 TBD 2.5 TBD 2.5 TBD 2.5 TBD

00

1.8 TBD 1.5 TBD 1.5 TBD 1.8 TBD

Record & Playback

01 1 1 1 1 1 1 1 0 0 1 1 11

3.3 TBD 3.3 TBD 3.3 TBD 3.3 TBD

(64x oversampling mode)

01

2.5 TBD 2.5 TBD 2.5 TBD 2.5 TBD

00

1.8 TBD 1.5 TBD 1.5 TBD 1.8 TBD

mW

0.0950

0.0570

0.0233

1.4421

0.7750

0.3771

TBD

TBD

TBD

7.7121

4.2425

2.1156

9.9330

5.4900

2.7492

TBD

TBD

TBD

TBD

TBD

TBD

38.9796

21.9675

10.2333

39.9696

22.6750

10.5570

TBD

TBD

TBD

TBD

TBD

TBD

Table 1 Supply Current Consumption

Notes:

1. All figures are at TA = +25oC, Slave Mode, fs = 48kHz, MCLK = 12.288 MHz (256fs), with zero signal (quiescent)

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

w

PTD Rev 2.2 June 2004

8

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