wm8987 Wolfson Microelectronics plc, wm8987 Datasheet - Page 9

• Manufacturer Part Number: wm8987
• Description: Stereo Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Production Data
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TYPICAL PERFORMANCE
POWER CONSUMPTION
The power consumption of the WM8987L depends on the following factors.
•
•
Table 1 Typical Supply Current Consumption
Notes:
1.
2.
Code
POF-01
POF-02
POF-03
PST-01
PST-02
PST-03
PPB-01
PPB-02
PPB-03
PPS-01
PPS-02
PPS-03
PPC-01
PPC-02
PPC-03
PRD-01
PRD-02
PRD-03
PRS-01
PRS-02
PRS-03
PRL-01
PRL-02
PRL-03
PDL-01
PDL-02
PDL-03
Supply voltages: Reducing the supply voltages also reduces supply currents, and therefore results in significant power
savings, especially in the digital sections of the WM8987L.
Operating mode: Significant power savings can be achieved by always disabling parts of the WM8987L 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.
Control Register
Bit
OFF
Standby
(500 KOhm VMID string)
BTL Headset Stereo Playback
0.1mW/channel into 32 Ohm load
Single-ended Headset Stereo Playback
0.1mW/channel into 32 Ohm load
Single-ended Headset Stereo Playback
(capless mode using OUT3)
0.1mW/channel into 32 Ohm load
Differential mono mic record
(LINPUT1-RINPUT1)
Single-ended mono mic record
(from LINPUT1)
Single-ended stereo line record
(from L/RINPUT1)
Simultaneous record and playback
(stereo, line-in / line-out)
A
= +25
o
C, Slave Mode, fs = 48kHz, MCLK = 12.288 MHz (256fs), with zero signal (quiescent)
00 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 11
10 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 11
01 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 11
01 1 0 0 0 0 0 0 1 1 0 1 1 0 0 0 0 1 1 11
01 1 0 0 0 0 0 0 1 1 0 1 1 0 1 0 0 1 1 11
01 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 1 1 11
01 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 1 1 11
01 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 1 1 11
01 1 1 1 1 1 0 0 1 1 0 1 1 0 0 0 0 1 1 11
R25 (19h)
R26 (1Ah)
R24 (18h)
R23
01
00
01
00
01
00
01
00
01
00
01
00
01
00
01
00
01
00
Interface Stopped
LMICBOOST=10
LMICBOOST=10
Clocks stopped
Other settings
DATSEL=01
DATSEL=01
LINSEL=11
3.3 0.000 3.3 0.010
2.7 0.000 2.0 0.007
1.8 0.000 1.5 0.007
3.3 0.482 3.3 0.011
2.7 0.310 2.0 0.008
1.8 0.184 1.5 0.007
3.3 2.573 3.3 4.601
2.7 2.052 2.0 2.371
1.8 1.297 1.5 1.750
3.3 2.232 3.3 4.662
2.7 1.778 2.0 2.411
1.8 1.126 1.5 1.758
3.3 2.229 3.3 4.662 3.3 0.248 3.3 4.007
2.7 1.776 2.0 2.408 2.5 0.175 2.7 4.007
1.8 1.126 1.5 1.757 1.8 0.119 1.8 3.674
3.3 3.551 3.3 4.883
2.7 3.077 2.0 2.255
1.8 2.388 1.5 1.584
3.3 3.196 3.3 4.888
2.7 2.799 2.0 2.270
1.8 2.221 1.5 1.588
3.3 4.532 3.3 4.917
2.7 4.037 2.0 2.281
1.8 3.313 1.5 1.605
3.3 6.295 3.3 7.836
2.7 5.454 2.0 3.837
1.8 4.212 1.5 2.760
V
AVDD
I (mA)
V
DCVDD
I (mA)
3.3 0.000 3.3 0.000
2.5 0.000 2.7 0.000
1.8 0.000 1.8 0.000
3.3 0.000 3.3 0.000
2.5 0.000 2.7 0.000
1.8 0.000 1.8 0.000
3.3 0.248 3.3 4.291
2.5 0.175 2.7 4.314
1.8 0.119 1.8 3.879
3.3 0.248 3.3 2.005
2.5 0.175 2.7 2.021
1.8 0.119 1.8 1.856
3.3 0.298 3.3 0.000
2.5 0.213 2.7 0.000
1.8 0.148 1.8 0.000
3.3 0.295 3.3 0.000
2.5 0.212 2.7 0.000
1.8 0.146 1.8 0.000
3.3 0.287 3.3 0.000
2.5 0.206 2.7 0.000
1.8 0.142 1.8 0.000
3.3 0.286 3.3 0.679
2.5 0.206 2.7 0.711
1.8 0.142 1.8 0.364
V
DBVDD
PD Rev 4.0 August 2008
I (mA)
V
HPVDD
I (mA)
WM8987L
Tot. Power
38.653
22.368
12.156
30.185
15.517
36.782
20.868
11.490
28.816
13.350
27.651
12.627
32.129
15.977
49.817
24.835
12.632
0.033
0.014
0.011
1.627
0.853
0.342
8.219
6.941
6.643
8.627
mW
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