Global Mixed-mode Technology Inc.
Total Harmonic Distortion Plus
Noise vs Frequency
10
5
2
1
0.5
0.2
%
0.1
0.05
0.02
0.01
0
.005
0
.002
0
.001
20
50
100
200
50
0
Hz
1k
2k
5k
10k
20
k
%
10
G1422
VDD=3.3V
RL=32
Ω
SE
Av=-2V/V
Total Harmonic Distortion Plus
Noise vs Output Power
5
2
1
VDD=5V
RL=32
Ω
SE
Po=75mW
Av=-4V/V
0.5
0.2
0.1
0.05
0.02
0.01
20kHz
Av=-2V/V
20 Hz
1kHz
Av=-1V/V
0.005
0.002
0.001
1m
2m
5m
10
m
W
2
0m
5
0m
100m
Figure 17
Figure 18
Supply Ripple Rejection Ratio
vs Frequency
+0
-10
-20
-30
-40
d
B
-50
-60
-70
-80
-90
-100
20
V
Output Noise Voltage
vs Frequency
100u
90u
80u
70u
60u
50u
40u
T
VDD=5V
RL=4
Ω
CB=4.7µF
Vripple=0.5Vpp
VDD=5V RL=4
Ω
BTL Mode 20kHz LP
30u
SE Mode
20u
VDD=5V RL=32
Ω
SE Mode BW<32kHz
BTL Mode
50
100
200
500
Hz
1k
2
k
5k
10k
2
0k
10u
20
50
100
200
50
0
Hz
1k
2k
5k
10k
20
k
Figure 19
Figure 20
Open Loop Response
-30
-35
-40
-45
-50
-55
-60
d
B
-65
-70
-75
-80
-85
-90
-95
-100
20
50
Channel Separation
VDD=5V
Po=1.5W
RL=4
Ω
BTL
Channel A to B
Channel B to A
100
200
500
Hz
1k
2k
5k
10k
20k
Figure 21
Figure 22
Ver: 1.2
Jun 29, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
6
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
