SigmaTel, Inc.
Data Sheet
STAC9721
10.3 Power Consumption
Table 31: Power Consumption at Default Analog Current
PARAMETER
Digital Supply Current
MIN
TYP
MAX UNITS
+ 5V Digital: DAC and ADC Active
+ 3.3V Digital: DAC and ADC Active
+ 3.3V Digital: DAC and ADC Muted
30
20
7
mA
mA
mA
Analog Supply Current
+ 5V Analog: PC_BEEP Muted
+ 3.3V Analog: PC_BEEP Muted
38
34
mA
mA
Power Down Status
PR0 +5V Analog Supply Current
PR1 +5V Analog Supply Current
PR2 +5V Analog Supply Current
PR3 +5V Analog Supply Current
PR0,1,2,3 +5V Analog Supply Current
PR4 +3.3V Digital Supply Current
PR4 +5V Digital Supply Current
PR5 No Effect
28
37
mA
mA
mA
mA
mA
mA
mA
28
1.1
0.6
0.1
0.1
Table 32: Power Consumption at 3.3V Analog, Low Current Mode*
PARAMETER
Digital Supply Current
MIN
TYP
MAX UNITS
+ 3.3V Digital with DAC and ADC Active
Analog Supply Current
+ 3.3V Analog with DAC and ADC Muted
Power Down Status
20
19
mA
mA
PR0 +3.3V Analog Supply Current
PR1 +3.3V Analog Supply Current
PR2 +3.3V Analog Supply Current
PR3 +3.3V Analog Supply Current
PR0,1,2,3 +3.3V Analog Supply Current
PR4 +3.3V Digital Supply Current
PR5 No Effect
15
19
mA
mA
mA
mA
mA
mA
15
0.4
0.4
0.1
* -50% Analog Current Setting (Recommended for 3.3V Analog only): Register 70h=ABBAh, 72h=0002h
39
04/07/00
04/07/00
ETC [ ETC ]
