WM8971L Wolfson Microelectronics Ltd., WM8971L Datasheet - Page 12

• Manufacturer Part Number: WM8971L
• Description: Stereo Codec for Portable Audio Applications
• Manufacturer: Wolfson Microelectronics Ltd.

WM8971L
w
Control Register
Bit
OFF
Standby
(500 KOhm VMID string)
Playback to Line-out
Playback to Line-out
(64x oversampling mode)
Playback to 16 Ohm Headphone 01 1 0 0 0 0 0 1 1 1 1 0 0 0 0 0 11
Playback to 8 Ohm BTL Speaker 01 1 0 0 0 0 0 1 1 0 0 1 1 0 0 0 11
Headphone Amp
(line-in to 16 Ohm headphone)
Speaker Amp
(line-in to 8 Ohm speaker)
Phone Call
(mono line-in to headphone,
mic to MONOOUT)
Record from Line-in
Record from Line-in
(64x oversampling mode)
Record from mono microphone
Stereo Record & Playback
Stereo Record & Playback
(64x oversampling mode)
POWER CONSUMPTION
The power consumption of the WM8971L depends on the following factors.
•
•
Table 1 Supply Current Consumption
Notes:
1.
2.
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.)
All figures are at T
The power dissipated in the headphone or speaker is not included in the above table.
A
00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11
10 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11
01 1 0 0 0 0 0 1 1 0 0 1 1 0 0 0 11
01 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 11
01 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 11
01 1 0 0 0 0 0 0 0 0 0 1 1 0 0 0 11
01 1 0 0 0 0 1 0 0 0 0 1 1 1 0 0 11
01 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 11
01 1 1 1 1 1 0 0 0 0 0 0 0 0 1 0 11
01 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 11
01 1 1 1 1 1 1 1 1 0 0 1 1 0 0 0 11
01 1 1 1 1 1 1 1 1 0 0 1 1 0 1 1 11
= +25
R25 (19h)
o
C, Slave Mode, fs = 48kHz, MCLK = 12.288 MHz (256fs), with zero signal (quiescent)
R26 (1Ah)
R24
R23
01
00
01
00
01
00
01
00
01
00
01
00
01
00
01
00
01
00
01
00
01
00
01
00
01
00
01
00
R24, ROUT2INV=1
R24, ROUT2INV=1
Interface Stopped
R23, DATSEL=01
Clocks Stopped
Clocks Stopped
Clocks Stopped
Clocks stopped
Other settings
3.3 0.0016 3.3 0.0190 3.3 0.0080 3.3 0.0002
2.5 0.0008 2.5 0.0170 2.5 0.0050 2.5 0.0000
1.8 0.0005 1.5 0.0120 1.5 0.0029 1.8 0.0000
3.3 0.3900 3.3 0.0390 3.3 0.0080 3.3 0.0000
2.5 0.2880 2.5 0.0170 2.5 0.0050 2.5 0.0000
1.8 0.1970 1.5 0.0120 1.5 0.0030 1.8 0.0000
3.3 3.7310 3.3 5.6600 3.3 0.3000 3.3 0.2370
2.5 2.6940 2.5 3.8600 2.5 0.2200 2.5 0.2100
1.8 1.8820 1.5 2.1400 1.5 0.1240 1.8 0.1500
3.3 3.5170 3.3 4.6470 3.3 0.3000 3.3 0.9500
2.5 2.5760 2.5 3.2030 2.5 0.2200 2.5 0.6480
1.8 1.7760 1.5 1.7590 1.5 0.1240 1.8 0.4130
3.3 3.7260 3.3 5.6700 3.3 0.3000 3.3 0.9530
2.5 2.7530 2.5 3.9250 2.5 0.2200 2.5 0.6570
1.8 1.8900 1.5 2.1410 1.5 0.1240 1.8 0.4150
3.3 3.8820 3.3 5.6470 3.3 0.3000 3.3 0.2830
2.5 2.8780 2.5 3.9390 2.5 0.2200 2.5 0.2100
1.8 1.9800 1.5 2.1630 1.5 0.1240 1.8 0.1510
3.3 1.8400 3.3 0.0200 3.3 0.0080 3.3 0.9540
2.5 1.3300 2.5 0.0190 2.5 0.0050 2.5 0.6400
1.8 0.9300 1.5 0.0130 1.5 0.0030 1.8 0.4100
3.3 1.9780 3.3 0.0200 3.3 0.0080 3.3 0.3310
2.5 1.4300 2.5 0.0190 2.5 0.0050 2.5 0.2430
1.8 0.9860 1.5 0.0130 1.5 0.0030 1.8 0.1760
3.3 2.5230 3.3 0.0370 3.3 0.0080 3.3 0.4420
2.5 1.8520 2.5 0.0190 2.5 0.0050 2.5 0.3200
1.8 1.2900 1.5 0.0130 1.5 0.0030 1.8 0.2240
3.3 8.6600 3.3 6.5700 3.3 0.3330 3.3 0.0000
2.5 7.7100 2.5 4.2800 2.5 0.2320 2.5 0.0000
1.8 6.8000 1.5 2.2100 1.5 0.1350 1.8 0.0000
3.3 5.0720 3.3 5.9100 3.3 0.3390 3.3 0.0000
2.5 4.2550 2.5 3.7500 2.5 0.2320 2.5 0.0000
1.8 3.5900 1.5 1.9100 1.5 0.1350 1.8 0.0000
3.3 4.9330 3.3 6.5400 3.3 0.3390 3.3 0.0000
2.5 4.2970 2.5 4.2500 2.5 0.2400 2.5 0.0000
1.8 3.7210 1.5 2.2200 1.5 0.1370 1.8 0.0000
3.3 11.927 3.3 10.870 3.3 0.3320 3.3 0.2820
2.5 10.112 2.5 7.3600 2.5 0.2340 2.5 0.2060
1.8 7.3910 1.5 4.0610 1.5 0.1320 1.8 0.1480
3.3 8.1090 3.3 9.3300 3.3 0.3330 3.3 0.2820
2.5 6.5500 2.5 6.3020 2.5 0.2340 2.5 0.2070
1.8 4.7000 1.5 3.3800 1.5 0.1320 1.8 0.1490
V
AVDD
I (mA)
V
DCVDD
I (mA)
V
DBVDD
I (mA)
PD Rev 4.1 August 2005
V
HPVDD
I (mA)
Production Data
Tot. Power
32.7624
17.4600
31.0662
16.6175
35.1417
18.8875
33.3696
18.1175
51.3579
30.5550
15.7575
37.3593
20.5925
38.9796
21.9675
10.2333
77.2563
44.7800
19.8597
59.5782
33.2325
13.9962
0.0950
0.0570
0.0233
1.4421
0.7750
0.3771
7.0536
6.7647
7.5465
7.2663
9.3126
4.9850
2.4360
7.7121
4.2425
2.1156
9.9330
5.4900
2.7492
9.5295
mW
12