WM9715L
Production Data
POWER CONSUMPTION
The power consumption of the WM9715L depends on the following factors.
•
Supply voltages: Reducing the supply voltages also reduces digital supply currents, and therefore results in significant
power savings especially in the digital sections of the WM9715L.
•
Operating mode: Significant power savings can be achieved by always disabling parts of the WM9715L that are not
used (e.g. audio ADC, DAC, touchpanel digitiser).
Mode Description
26h 14:8
24h 15:0
Other Settings
AVDD
I (mA)
DCVDD
I (mA)
DBVDD
I (mA)
Total Power
(mW)
V
V
V
OFF (lowest possible power)
Clocks stopped
1111111 0111111111111111 58h, SVD = 1
1111111 0111111111111111
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
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
0.0005
0.0004
0.0003
0.005
0.004
0.003
0.56
0.37
0.241
1.1
0.76
0.508
0.05
0.02
0.009
0.08
0.04
0.027
2.36
1.838
1.218
2.385
1.837
1.218
3.27
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
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
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
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
0
0
0
0
0
0
0
0
3.26
2.1
1.41
2.67
2.1
1.41
0
0.00165
0.001
0.00054
0.0165
0.01
0.0054
1.848
0.925
0.4338
3.63
1.9
0.9144
15.2163
7.5075
3.582
LPS (Low Power Standby)
VREF maintained using 1MOhm string
Standby Mode (ready to playback)
VREF maintained using 50kOhm string
1110111 0111111111111111
"Idle" Mode
1100111 0111111111111111
0
0
0
VREF maintained using 50kOhm string
use LPS mode instead, if possible
Touchpanel only (waiting for pen-down)
AC-Link running
1101111 0111111111111111 76h = 0C00h
78h = 0001h
1.301
0.883
0.571
5.85
3.922
2.87
0
0
0
0
0
Touchpanel only (continuous conversion)
93.75 points per second
1001111 0111111111111111 76h = 0C00h
78h = C001h
28.38
15.155
7.7526
7.788
Phone Call - using headphone / ear speaker 0110011 0111100010101100 0Eh, bit 7 = 1
HPOUTL, HPOUTR and OUT3 active
AC-Link stopped
Phone Call - using loudspeaker
AC-Link stopped
(mic gain boost)
0
0
0
0
4.595
2.1924
7.8705
4.5925
2.1924
56.364
31.425
15.2244
80.1933
45.28
1110011 0111101100110100 0Eh, bit 7 = 1
(mic gain boost)
0
0
Record from mono microphone
with MICBIAS
all analogue outputs disabled
Record phone call
both sides mixed to mono
call using headphone / ear speaker
DAC Playback - using loudspeaker
1000110 0110101111111111 0Eh, bit 7 = 1
(mic gain boost)
11.21
7.78
5.21
12.22
8.552
5.799
9.884
6.755
4.606
9.8
6.78
4.606
9.8
6.78
4.606
12.26
8.563
5.8
2.6
2.13
1.41
2.62
2.1
1.48
2.6
2.1
1.41
2.6
2.1
1.47
2.6
2.1
1.41
2.62
2.12
1.48
2.66
1.838
9.461
7.46
5.318
3.45
2.549
1.738
3.62
0000000 0000000010001000 0Eh, bit 7 = 1
(mic gain boost)
22.6746
52.5822
28.51
1000001 0001111101110111
0000001 0001110011101111
0000001 0001110011110111
13.9572
52.866
28.975
14.0832
52.866
28.975
13.9752
80.7609
45.1325
22.8024
DAC Playback - using headphone
DAC Playback - to Line-out
2.71
1.748
3.62
2.71
1.748
9.593
7.37
Maximum Power (everything on)
0000000 0000000000000000 0Eh, bit 7 = 1
(mic gain boost)
5.388
Table 1 Supply Current Consumption
Notes:
1. All figures are at TA = +25oC, audio sample rate fs = 48kHz, with zero signal (quiescent).
2. The power dissipated in the headphone, speaker and touchpanel is not included in the above table.
PD Rev 4.0 December 2007
12
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
