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WM8777
SUPPLY CURRENT
The supply current of the WM877 depends on the operating mode. For example, the supply current
is lower when the device is used for playback-only (ADC off) or recording-only (DACs off). The supply
currents for various operating modes are shown in Table 1 below.
MODE DESCRIPTION
SUPPLY CURRENT
AVDDDAC
2.81
AVDDADC
1.89
PVDD
0.30
0.30
0.30
0.30
0.30
1.12
3.74
3.43
3.43
3.44
DVDD
0.39
TOTAL
5.39
UNIT
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
On power-up, no clks applied
On power-up, clks applied
ADC
2.81
1.89
1.70
6.70
2.71
38.86
1.90
5.80
47.67
All DACs
55.35
53.45
53.44
53.38
53.38
87.53
146.60
18.61
22.4
76.16
ADC, All DACs
38.69
38.70
38.62
38.62
38.53
38.42
114.84
115.66
124.39
125.32
159.48
218.45
ADC, All DACs, Osc
22.4
ADC, All DACs, Osc, PLL
ADC, All DACs, Osc, PLL, S/PDIF
ADC, All DACs, Osc, PLL, S/PDIF, Tone
28.65
29.89
29.99
29.99
ADC, All DACs, Osc, PLL, S/PDIF, Tone,
HP (16 Ohm)
Power-down, no clks applied
Power-down, clks applied
Software RESET
0.028
0.028
2.80
0.172
0.172
1.88
0.30
0.30
0.3
0.39
1.60
0.95
0.89
2.10
5.93
mA
mA
mA
Table 1 Supply Current for Functional Blocks
Notes:
1. DAC Analogue supply (AVDDDAC) = 5V.
2. ADC Analogue supply (AVDDADC) = 5V.
3. PLL Analogue supply (PVDD) = 5V.
4. Digital supply (DVDD) = 3.3V.
PP Rev 1.94 November 2004
11
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
