WM8955BL Wolfson Microelectronics, WM8955BL Datasheet - Page 10

• Manufacturer Part Number: WM8955BL
• Description: Stereo DAC
• Manufacturer: Wolfson Microelectronics

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