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SLOS417B – OCTOBER 2003 – REVISED JULY 2006
SUPPLY RIPPLE REJECTION RATIO
vs
FREQUENCY
−30
Sopply Ripple Rejection Ratio − dB
Sopply Ripple Rejection Ratio − dB
Inputs ac-grounded
C
I
= 2
µF
R
L
= 8
Ω
Gain = 2 V/V
V
DD
= 2. 5 V
V
DD
= 3.6 V
SUPPLY RIPPLE REJECTION RATIO
vs
FREQUENCY
−30
−40
Sopply Ripple Rejection Ratio − dB
Inputs ac-grounded
C
I
= 2
µF
R
L
= 4
Ω
Gain = 2 V/V
V
DD
= 2.5 V
SUPPLY RIPPLE REJECTION RATIO
vs
FREQUENCY
−30
−40
−50
−60
−70
−80
−90
V
DD
= 3.6 V
V
DD
= 2.5 V
V
DD
= 5 V
Inputs floating
R
L
= 8
Ω
−40
−50
−60
−70
−50
−60
−70
V
DD
= 3.6 V
−80
V
DD
= 5 V
−90
20
100
1k
10 k 20 k
f − Frequency − Hz
−80
V
DD
= 5 V
−90
20
100
1k
f − Frequency − Hz
10 k 20 k
20
100
1k
f − Frequency − Hz
10 k 20 k
Figure 19.
GSM POWER SUPPLY REJECTION
vs
TIME
Figure 20.
GSM POWER SUPPLY REJECTION
vs
FREQUENCY
0
C1 − High
3.6 V
C1 − Amp
512 mV
VO − Output Voltage − dBV
0
−50
V
DD
Shown in Figure 22
C
I
= 2
µF,
Inputs ac-grounded
Gain = 2V/V
−50
−100
V DD − Supply Voltage − dBV
4
V
DD
200 mV/div
C1 − Duty
12%
V
OUT
20 mV/div
−150
−100
−150
0
400
800
1200
1600
2000
f − Frequency − Hz
t − Time − 2 ms/div
Figure 22.
SUPPLY RIPPLE REJECTION RATIO
vs
DC COMMON MODE VOLTAGE
0
Sopply Ripple Rejection Ratio − dB
−10
−20
−30
−40
V
DD
= 3.6 V
−50
−60
−70
−80
0
0.5
1
1.5
2
2.5
3
3.5 4
4.5 5
DC Common Mode Voltage − V
V
DD
= 2. 5 V
V
DD
= 5 V
CMRR − Common Mode Rejection Ratio − dB
Figure 23.
COMMON-MODE REJECTION RATIO
vs
FREQUENCY
V
IC
= 200 mV
PP
R
L
= 8
Ω
Gain = 2 V/V
CMRR − Common Mode Rejection Ratio − dB
−50
COMMON-MODE REJECTION RATIO
vs
COMMON-MODE INPUT VOLTAGE
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
0
1
2
3
5
V
IC
− Common Mode Input Voltage − V
V
DD
= 5 V,
Gain = 2
V
DD
= 2.5 V
V
DD
= 3.6 V
−55
−60
V
DD
= 3.6 V
−65
−70
−75
20
100
1k
f − Frequency − Hz
10 k 20 k
Figure 24.
Figure 25.
Figure 26.
8
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