Datasheet

TPA6204A1
SLOS429B − MAY 2004 − REVISED SEPTEMBER 2009
www.ti.com
6
Figure 7
f − Frequency − Hz
+0
−100
−90
−80
−70
−60
−50
−40
−30
−20
−10
20 20k50 100 200 500 1k 2k 5k 10k
SUPPLY VOLTAGE REJECTION RATIO
vs
FREQUENCY
k
SVR
− Supply Voltage Rejection Ratio − dB
V
DD
= 3.6 V
V
DD
= 2.5 V
V
DD
= 5 V
R
L
= 8 Ω,
C
(BYPASS)
= 0.47 µF,
Gain = 1 V/V,
C
I
= 2 µF,
Inputs ac Grounded
Figure 8
−180
−160
−140
−120
−100
0 400 800 1200 1600 2000
−150
−100
−50
0
f − Frequency − Hz
− Supply Voltage − dBVV
V
DD
Shown in Figure 9,
R
L
= 8 Ω,
C
I
= 2.2 µF,
Inputs Grounded
GSM POWER SUPPLY REJECTION
vs
FREQUENCY
− Output Voltage − dBV
V
O
C
(BYPASS)
= 0.47 µF
Figure 9
C1
Frequency
217 Hz
C1 − Duty
20%
C1 Pk−Pk
500 mV
Ch1 100 mV/div
Ch4 10 mV/div
2 ms/div
V
DD
V
OUT
Voltage − V
t − Time − ms
GSM POWER SUPPLY REJECTION
vs
TIME
R
L
= 8 Ω
C
I
= 2.2 µF
C
(BYPASS)
= 0.47 µF
0
50
100
150
200
250
300
0 0.2 0.4 0.6 0.8 1
C
(Bypass)
− Bypass Capacitor − µF
Start-Up Time − ms
START-UP TIME
vs
BYPASS CAPACITOR
Figure 10