Cirrus Logic CS4245 - Manual (Page 20)

20 DS656F3
CS4245
DC ELECTRICAL CHARACTERISTICS
AGND = DGND = 0 V, all voltages with respect to ground. MCLK=12.288 MHz; Fs=48 kHz; Master Mode.
23. Power-Down Mode is defines as RESET = Low with all clock and data lines held static and no analog
input.
24. Valid with the recommended capacitor values on FILT1+, FILT2+, VQ1 and VQ2 as shown in the Typ-
ical Connection Diagram.
25. Guaranteed by design. The DC current draw represents the allowed current draw due to typical leakage
through the electrolytic de-coupling capacitors.
Parameter Symbol Min Typ Max Unit
Power Supply Current VA = 5 V
(Normal Operation) VA = 3.3 V
VD, VLS, VLC = 5 V
VD, VLS, VLC = 3.3 V
I
A
I
A
I
D
I
D
-
-
-
-
41
37
39
23
50
45
47
28
mA
mA
mA
mA
Power Supply Current VA = 5 V
(Power-Down Mode) (Note 23) VLS, VLC, VD=5 V
I
A
I
D
-
-
0.50
0.54
-
-
mA
mA
Power Consumption
(Normal Operation) VA, VD, VLS, VLC = 5 V
VA, VD, VLS, VLC = 3.3 V
(Power-Down Mode) VA, VD, VLS, VLC = 5 V
-
-
-
-
-
-
400
198
4.2
485
241
-
mW
mW
mW
Power Supply Rejection Ratio (1 kHz) (Note 24) PSRR - 55 - dB
VQ Characteristics
Quiescent Voltage 1 VQ1 - 0.5 x VA - VDC
DC Current from VQ1 (Note 25) I
Q1
- - 1  A
VQ1 Output Impedance Z
Q1
- 23 - k
Quiescent Voltage 2 VQ2 - 0.5 x VA - VDC
DC Current from VQ2 (Note 25) I
Q2
- - 1  A
VQ2 Output Impedance Z
Q2
- 4.5 - k
FILT1+ Nominal Voltage FILT1+ - VA - VDC
FILT2+ Nominal Voltage FILT2+ - VA - VDC
Microphone Bias Voltage MICBIAS - 0.8 x VA - VDC
Current from MICBIAS I
MB
- - 2 mA