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WM8750 Datasheet(PDF) 8 Page - Wolfson Microelectronics plc

Part # WM8750
Description  Stereo CODEC for Portable Audio Applications
PDF  60 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8750 Datasheet(HTML) 8 Page - Wolfson Microelectronics plc

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WM8750BL
Production Data
w
PD, Rev 4.1, August 2012
8
TYPICAL PERFORMANCE
POWER CONSUMPTION
The power consumption of the WM8750BL 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 WM8750BL.
Oversampling rate: Significant power savings can be achieved by running the DAC and ADC at the lower over-sampling
rate of 64 (this is achieved by setting ADCOSR and DACOSR to ‘1’ in R24). Note all figures quoted here assume
ADCOSR=DACOSR=1.
Operating mode: Disabling parts of the WM8750BL that are not currently in use (e.g. mic pre-amps, unused outputs,
DAC, ADC, etc.) also saves power.
Control Register
R23
Other settings
Tot. Power
Bit
VI (mA)
VI (mA)
VI (mA)
VI (mA)
mW
OFF
00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 11
Clocks stopped
3.3
0.000
3.3
0.010
3.3
0.000
3.3
0.000
0.0330
01
2.5
0.000
2.5
0.008
2.5
0.000
2.5
0.000
0.0200
00
1.8
0.000
1.5
0.007
1.8
0.000
1.8
0.000
0.0105
Standby
10 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 11
Interface Stopped
3.3
0.360
3.3
0.011
3.3
0.000
3.3
0.000
1.2243
(500 KOhm VMID string)
01
2.5
0.268
2.5
0.009
2.5
0.000
2.5
0.000
0.6925
00
1.8
0.183
1.5
0.007
1.8
0.000
1.8
0.000
0.3399
Playback to Line-out
01 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 11
3.3
2.457
3.3
4.687
3.3
0.250
3.3
0.683
26.6541
01
2.5
1.814
2.5
2.779
2.5
0.178
2.5
0.670
13.6025
00
1.8
1.606
1.5
1.483
1.8
0.122
1.8
0.406
6.0657
Playback to 32 Ohm Headphone
01 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 11
3.3
2.456
3.3
4.649
3.3
0.250
3.3
0.709
26.6112
01
2.5
1.814
2.5
2.758
2.5
0.178
2.5
0.682
13.5800
00
1.8
1.606
1.5
1.483
1.8
0.122
1.8
0.410
6.0729
Playback to 32 Ohm Headphone
01 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 11
3.3
2.456
3.3
5.454
3.3
0.250
3.3
1.929
33.2937
0.1mW / channel into load
01
2.5
1.814
2.5
3.354
2.5
0.178
2.5
1.927
18.1825
(JEITA CP-2905B)
00
1.8
1.607
1.5
1.831
1.8
0.122
1.8
1.793
9.0861
Playback to 32 Ohm Headphone
01 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 11
3.3
2.470
3.3
5.469
3.3
0.250
3.3 11.248
64.1421
5mW / channel into load
01
2.5
1.833
2.5
3.408
2.5
0.178
2.5 11.283
41.7550
00
1.8
1.635
1.5
1.862
1.8
0.122
1.8 10.974
25.7088
Playback to 32 Ohm Headphone
01 1 0 0 0 0 0 1 1 1 1 0 0 0 1 1 1 11
R24, OUT3SW=00
3.3
2.426
3.3
3.969
3.3
0.251
3.3
1.010
25.2648
(capless mode using OUT3)
01
2.5
1.788
2.5
2.705
2.5
0.179
2.5
0.980
14.1300
00
1.8
1.244
1.5
1.481
1.8
0.122
1.8
0.670
5.8863
Playback to 8 Ohm BTL Speaker
01 1 0 0 0 0 0 1 1 0 0 1 1 0 0 1 1 11
R24, ROUT2INV=1
3.3
2.652
3.3
4.655
3.3
0.250
3.3
1.256
29.0829
01
2.5
1.950
2.5
2.761
2.5
0.178
2.5
1.095
14.9600
00
1.8
1.694
1.5
1.482
1.8
0.122
1.8
0.773
6.8832
Headphone Amp
01 1 0 0 0 0 0 0 0 1 1 0 0 0 0 1 1 11
Clocks Stopped
3.3
1.107
3.3
0.624
3.3
0.000
3.3
0.685
7.9728
(line-in to 32 Ohm headphone)
01
2.5
0.812
2.5
0.090
2.5
0.000
2.5
0.672
3.9350
00
1.8
0.559
1.5
0.007
1.8
0.000
1.8
0.407
1.7493
Speaker Amp
01 1 0 0 0 0 0 0 0 0 0 1 1 0 0 1 1 11
Clocks Stopped
3.3
1.305
3.3
0.565
3.3
0.000
3.3
0.691
8.4513
(line-in to 8 Ohm speaker)
01
R24, ROUT2INV=1
2.5
0.948
2.5
0.092
2.5
0.000
2.5
0.679
4.2975
00
1.8
0.649
1.5
0.007
1.8
0.000
1.8
0.455
1.9977
Record from Line-in
01 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 11
3.3
4.631
3.3
5.010
3.3
0.273
3.3
0.000
32.7162
01
2.5
3.892
2.5
3.237
2.5
0.196
2.5
0.000
18.3125
00
1.8
3.239
1.5
1.649
1.8
0.135
1.8
0.000
8.5467
Record from mono microphone
01 1 1 0 1 0 1 0 0 0 0 0 0 0 0 1 1 11 R32, LMICBOOST=11; 3.3
2.829
3.3
4.996
3.3
0.273
3.3
0.000
26.7234
01
R23, DATSEL=01
2.5
2.330
2.5
3.208
2.5
0.194
2.5
0.000
14.3300
00
1.8
1.892
1.5
1.632
1.8
0.134
1.8
0.000
6.0948
Record from mono microphone
01 1 1 0 1 0 1 0 0 0 0 0 0 0 0 1 1 11 R32, LMICBOOST=11; 3.3
3.197
3.3
4.993
3.3
0.273
3.3
0.000
27.9279
(differential)
01
R23, DATSEL=01;
2.5
2.593
2.5
3.208
2.5
0.194
2.5
0.000
14.9875
00
R32, LINSEL=11
1.8
2.067
1.5
1.636
1.8
0.134
1.8
0.000
6.4158
Stereo Record & Playback
01 1 1 1 1 1 1 1 1 0 0 1 1 0 0 1 1 11
3.3
6.670
3.3
8.014
3.3
0.272
3.3
0.805
52.0113
01
2.5
5.389
2.5
5.326
2.5
0.196
2.5
0.613
28.8100
00
1.8
4.281
1.5
2.851
1.8
0.135
1.8
0.329
12.8175
DBVDD
HPVDD
R24
R25 (19h)
R26 (1Ah)
AVDD
DCVDD
Table 1 Supply Current Consumption
Notes:
1.
All figures are at TA = +25
oC, Slave Mode, fs = 48kHz, MCLK = 12.288 MHz (256fs), ADCOSR=DACOSR=1.
2.
Unless otherwise noted, these measurements are quiescent (i.e. signal amplitude is zero).



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