WM8750JL Просмотр технического описания (PDF) - Wolfson Microelectronics plc
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WM8750JL Datasheet PDF : 61 Pages
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WM8750JL
Production Data
TYPICAL PERFORMANCE
POWER CONSUMPTION
The power consumption of the WM8750JL 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 WM8750JL.
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 WM8750JL that are not currently in use (e.g. mic pre-amps, unused outputs,
DAC, ADC, etc.) also saves power.
Control Register
R25 (19h)
R26 (1Ah)
R24 R23 Other settings
AVDD
DCVDD
DBVDD
HPVDD Tot. Power
Bit
OFF
Standby
(500 KOhm VMID string)
Playback to Line-out
Playback to 32 Ohm Headphone
Playback to 32 Ohm Headphone
0.1mW / channel into load
(JEITA CP-2905B)
Playback to 32 Ohm Headphone
5mW / channel into load
Playback to 32 Ohm Headphone
(capless mode using OUT3)
Playback to 8 Ohm BTL Speaker
Headphone Amp
(line-in to 32 Ohm headphone)
Speaker Amp
(line-in to 8 Ohm speaker)
Record from Line-in
Record from mono microphone
Record from mono microphone
(differential)
Stereo Record & Playback
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 1 1 11 Clocks stopped 3.3 0.000 3.3 0.010 3.3 0.000 3.3 0.000
01
2.5 0.000 2.5 0.008 2.5 0.000 2.5 0.000
00
1.8 0.000 1.5 0.007 1.8 0.000 1.8 0.000
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
01
2.5 0.268 2.5 0.009 2.5 0.000 2.5 0.000
00
1.8 0.183 1.5 0.007 1.8 0.000 1.8 0.000
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
01
2.5 1.814 2.5 2.779 2.5 0.178 2.5 0.670
00
1.8 1.606 1.5 1.483 1.8 0.122 1.8 0.406
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
01
2.5 1.814 2.5 2.758 2.5 0.178 2.5 0.682
00
1.8 1.606 1.5 1.483 1.8 0.122 1.8 0.410
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
01
2.5 1.814 2.5 3.354 2.5 0.178 2.5 1.927
00
1.8 1.607 1.5 1.831 1.8 0.122 1.8 1.793
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
01
2.5 1.833 2.5 3.408 2.5 0.178 2.5 11.283
00
1.8 1.635 1.5 1.862 1.8 0.122 1.8 10.974
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
01
2.5 1.788 2.5 2.705 2.5 0.179 2.5 0.980
00
1.8 1.244 1.5 1.481 1.8 0.122 1.8 0.670
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
01
2.5 1.950 2.5 2.761 2.5 0.178 2.5 1.095
00
1.8 1.694 1.5 1.482 1.8 0.122 1.8 0.773
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
01
2.5 0.812 2.5 0.090 2.5 0.000 2.5 0.672
00
1.8 0.559 1.5 0.007 1.8 0.000 1.8 0.407
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
01 R24, ROUT2INV=1 2.5 0.948 2.5 0.092 2.5 0.000 2.5 0.679
00
1.8 0.649 1.5 0.007 1.8 0.000 1.8 0.455
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
01
2.5 3.892 2.5 3.237 2.5 0.196 2.5 0.000
00
1.8 3.239 1.5 1.649 1.8 0.135 1.8 0.000
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
01 R23, DATSEL=01 2.5 2.330 2.5 3.208 2.5 0.194 2.5 0.000
00
1.8 1.892 1.5 1.632 1.8 0.134 1.8 0.000
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
01 R23, DATSEL=01; 2.5 2.593 2.5 3.208 2.5 0.194 2.5 0.000
00 R32, LINSEL=11 1.8 2.067 1.5 1.636 1.8 0.134 1.8 0.000
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
01
2.5 5.389 2.5 5.326 2.5 0.196 2.5 0.613
00
1.8 4.281 1.5 2.851 1.8 0.135 1.8 0.329
mW
0.0330
0.0200
0.0105
1.2243
0.6925
0.3399
26.6541
13.6025
6.0657
26.6112
13.5800
6.0729
33.2937
18.1825
9.0861
64.1421
41.7550
25.7088
25.2648
14.1300
5.8863
29.0829
14.9600
6.8832
7.9728
3.9350
1.7493
8.4513
4.2975
1.9977
32.7162
18.3125
8.5467
26.7234
14.3300
6.0948
27.9279
14.9875
6.4158
52.0113
28.8100
12.8175
Table 1 Supply Current Consumption
Notes:
1. All figures are at TA = +25oC, 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).
w
PD, April 2012, Rev 4.1
8
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