Production Data
WM8973L
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
VMIDSEL
Bit
OFF
R25 (19h)
R26 (1Ah)
R24 R23
VSEL
Other settings
AVDD
DCVDD
DBVDD
HPVDD
Tot. Power
V I (mA) V I (mA) V I (mA) V I (mA)
00 0 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
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 1.8 0.0350 1.8 0.0000
Standby
10 1 0 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
(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 1.8 0.0036 1.8 0.0000
Playback to Line-out
01 1 0 0 0 0 0 1 1 0 0 1 1 0 0 0 0 11
3.3 3.7310 3.3 5.6600 3.3 0.3000 3.3 0.2370
01
2.5 2.6940 2.5 3.8600 2.5 0.2200 2.5 0.2100
00
1.8 1.8820 1.5 2.1400 1.8 0.1488 1.8 0.1500
Playback to Line-out
01 1 0 0 0 0 0 1 1 1 1 0 0 0 0 0 1 11
3.3 3.5170 3.3 4.6470 3.3 0.3000 3.3 0.9500
(64x oversampling mode)
01
2.5 2.5760 2.5 3.2030 2.5 0.2200 2.5 0.6480
00
1.8 1.7760 1.5 1.7590 1.8 0.1488 1.8 0.4130
Playback to 16 Ohm Headphone 01 1 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 11
3.3 3.7260 3.3 5.6700 3.3 0.3000 3.3 0.9530
01
2.5 2.7530 2.5 3.9250 2.5 0.2200 2.5 0.6570
00
1.8 1.8900 1.5 2.1410 1.8 0.1488 1.8 0.4150
Playback to 16 Ohm Headphone 01 1 0 0 0 0 0 1 1 1 1 0 0 0 1 0 0 11 R24, OUT3SW=00 3.3 3.7060 3.3 5.6400 3.3 0.3000 3.3 1.4040
(capless mode using OUT3)
01
2.5 2.7130 2.5 3.9000 2.5 0.2200 2.5 0.9600
00
1.8 1.8870 1.5 2.1410 1.8 0.1488 1.8 0.6140
Playback to 8 Ohm BTL Speaker 01 1 0 0 0 0 0 1 1 0 0 1 1 0 0 0 0 11 R24, ROUT2INV=1 3.3 3.8820 3.3 5.6470 3.3 0.3000 3.3 0.2830
01
2.5 2.8780 2.5 3.9390 2.5 0.2200 2.5 0.2100
00
1.8 1.9800 1.5 2.1630 1.8 0.1488 1.8 0.1510
Headphone Amp
01 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 11
Clocks Stopped
3.3 1.8400 3.3 0.0200 3.3 0.0080 3.3 0.9540
(line-in to 16 Ohm headphone)
01
2.5 1.3300 2.5 0.0190 2.5 0.0050 2.5 0.6400
00
1.8 0.9300 1.5 0.0130 1.8 0.0036 1.8 0.4100
Speaker Amp
01 1 0 0 0 0 0 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, ROUT2INV=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 1.8 0.0036 1.8 0.1760
Phone Call
01 1 0 0 0 0 1 0 0 0 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 1.8 0.0036 1.8 0.2240
Record from Line-in
01 1 1 1 1 1 0 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
01
2.5 7.7100 2.5 4.2800 2.5 0.2320 2.5 0.0000
00
1.8 6.8000 1.5 2.2100 1.8 0.1620 1.8 0.0000
Record from Line-in
01 1 1 1 1 1 0 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
(64x oversampling mode)
01
2.5 4.2550 2.5 3.7500 2.5 0.2320 2.5 0.0000
00
1.8 3.5900 1.5 1.9100 1.8 0.1620 1.8 0.0000
Record from mono microphone 01 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 11 R32, LMICBOOST=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 1.8 0.1644 1.8 0.0000
Record from mono microphone 01 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 11 R32, LMICBOOST=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, LINSEL=11
1.8 3.9000 1.5 2.2200 1.8 0.1656 1.8 0.0000
Stereo Record & Playback
01 1 1 1 1 1 1 1 1 0 0 1 1 0 0 0 0 11
3.3 11.927 3.3 10.870 3.3 0.3320 3.3 0.2820
01
2.5 10.112 2.5 7.3600 2.5 0.2340 2.5 0.2060
00
1.8 7.3910 1.5 4.0610 1.8 0.1584 1.8 0.1480
Stereo Record & Playback
01 1 1 1 1 1 1 1 1 0 0 1 1 0 0 1 1 11
3.3 8.1090 3.3 9.3300 3.3 0.3330 3.3 0.2820
(64x oversampling mode)
01
2.5 6.5500 2.5 6.3020 2.5 0.2340 2.5 0.2070
00
1.8 4.7000 1.5 3.3800 1.8 0.1584 1.8 0.1490
VREF
AINL
AINR
ADCL
ADCR
MICB
DACL
DACR
LOUT1
ROUT1
LOUT2
ROUT2
MONO
OUT3
ADCOSR
DACOSR
mW
0.0950
0.0570
0.0819
1.4421
0.7750
0.3791
32.7624
17.4600
7.1354
31.0662
16.6175
6.8465
35.1417
18.8875
7.6283
36.4650
19.4825
7.9811
33.3696
18.1175
7.3481
9.3126
4.9850
2.4380
7.7121
4.2425
2.1176
9.9330
5.4900
2.7512
51.3579
30.5550
15.8466
37.3593
20.5925
9.6186
38.9796
21.9675
10.3237
39.9696
22.6750
10.6481
77.2563
44.7800
19.9468
59.5782
33.2325
14.0833
Table 1 Supply Current Consumption
Notes:
1.
2.
All figures are at T
A
= +25 C, 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.
o
w
PD, Rev 4.5, December 2011
13
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
