SigmaTel, Inc.
Data Sheet
STAC9721
39
04/07/00
04/07/00
10.3
Power Consumption
Table 31: Power Consumption at Default Analog Current
PARAMETER
MIN
TYP
MAX UNITS
Digital Supply Current
+ 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
28
1.1
0.6
0.1
0.1
mA
mA
mA
mA
mA
mA
mA
Table 32: Power Consumption at 3.3V Analog, Low Current Mode*
PARAMETER
MIN
TYP
MAX UNITS
Digital Supply Current
+ 3.3V Digital with DAC and ADC Active
20
mA
Analog Supply Current
+ 3.3V Analog with DAC and ADC Muted
19
mA
Power Down Status
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
15
0.4
0.4
0.1
mA
mA
mA
mA
mA
mA
* -50% Analog Current Setting (Recommended for 3.3V Analog only): Register 70h=ABBAh, 72h=0002h
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