WM8955BL
Production Data
POWER CONSUMPTION
The power consumption of the WM8955BL depends on the following factors.
•
Supply voltages: Reducing the supply voltages also reduces supply currents, and therefore results in significant power
savings.
•
Operating mode: Power consumption is lower in mono modes than in stereo, as one DAC is switched OFF. Unused
analogue outputs should be switched off.
Control Register
R25
R26 (1Ah)
R24 R23 R38 R43
Other settings
AVDD
DCVDD
DBVDD
HPVDD
Tot. Power
Bit
V
I (mA)
V
I (mA)
V
I (mA)
V
I (mA)
(mW)
0.03432
0.02125
0.01023
2.40405
1.22725
0.50544
32.50698
17.95925
7.45734
29.03901
16.08425
6.74379
32.4258
17.9925
7.458996
34.4091
19.4675
8.8857
OFF
00
0
1
1
1
1
1
1
1
0
0
0
1
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
1
1
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
1
0
0
0
0
1
0
0
0
0
0
11
01
00
11
01
00
11
01
00
11
01
00
11
01
00
11
01
00
11
01
00
11
01
00
11
01
00
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
Clocks stopped
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
0.0001
0.0001
0.0001
0.2339
0.1737
0.1208
3.9903
2.9459
2.0701
3.7821
2.7924
1.9604
3.9623
2.946
3.3
2.5
1.5
3.3
2.5
1.5
3.3
2.5
1.5
3.3
2.5
1.5
3.3
2.5
1.5
3.3
2.5
1.5
3.3
2.5
1.5
3.3
2.5
1.5
3.3
2.5
1.5
0.0103
0.0084
0.0067
0.409
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
0
0
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
3.3
2.5
1.8
0
0
0
0
Low-power standby (LPS)
10
01
01
01
01
01
01
00
0.0856
0.0616
0.042
0.0878
0.0632
0.0432
0.0879
0.0632
0.0432
0.0878
0.0632
0.04332
0.0881
0.064
0.04272
0
0
using 500 KOhm VMID string
0.2556
0.1416
5.1104
3.5193
1.9742
4.2678
2.9224
1.6299
5.0846
3.5187
1.9742
5.1007
3.557
0
0
Playback to Line-out
0.6621
0.6553
0.3845
0.6619
0.6557
0.3847
0.6913
0.6691
0.3852
1.172
1.167
0.914
0.6624
0.6291
0.3869
1.1675
1.1017
0.6576
0
Playback to Line-out
(64x oversampling mode)
Playback
to 16 Ohm headphone
using caps on HPOUTL/R
Playback
2.0702
4.0662
2.999
R24, OUT3SW=00
Clocks stopped
Clocks stopped
to 16 Ohm headphone
capless mode using OUT3
Headphone Amp
2.0705
1.7135
1.211
1.9164
0.0901
0.009
8.1378
line-in to 16 Ohm h/phone
0
4.62275
2.15013
10.61082
6.34125
2.82801
3.6993
0.8017
1.9574
1.4258
0.9076
0.5389
0.4554
0.4034
0.0071
0.0905
0.009
0
Phone Call
0
diff. mono line-in to h/phone,
diff. mono line-out to TX
PLL only
0
0.0071
0.4966
0.2774
0.145
0
0.0855
0.0616
0.04188
0
1.986
0
1.019004
Table 1 Supply Current Consumption
Notes:
1. TA = +25oC, Slave Mode, fs = 48kHz, MCLK = 12.288 MHz (256fs), 24-bit data
2. All figures are quiescent, with no signal.
3. The power dissipated in the headphone itself is not included in the above table.
PD Rev 4.1 February 2007
10
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
