Global Mixed-mode Technology Inc.
G1421
Total Harmonic Distortion Plus
Noise vs Output Frequency
Output Noise Voltage
vs Frequency
10
5
100u
90u
80u
VDD=3.3V
VDD=5V
BW=22Hz to 20kHz
70u
60u
RL=32
2
1
Ω
RL=4
Ω
SE
50u
40u
0.5
Po=10mW
0.2
0.1
Vo BTL
Vo SE
%
V
30u
20u
0.05
Po=20mW
0.02
0.01
0.005
Po=30mW
0.002
0.001
10u
20
20
50
100
200
500
Hz
1k
2k
5k
10k
20k
50
10 0
200
5 00
Hz
1k
2k
5 k
10k
20k
Figure 41
Figure 42
Output Noise Voltage
vs Frequency
Output Noise Voltage
vs Frequency
100u
90u
80u
100u
90u
VDD=3.3V
80u
70u
BW=22Hz to 20kHz
Vo BTL
70u
60u
RL=4
Ω
60u
50u
50u
40u
BW=22Hz to 20kHz
A- Weighted Filter
40u
30u
V
V
30u
20u
VDD=5V
HP-IN
20u
Vo SE
RL=4
Ω
10u
20
10u
20
5 0
1 00
200
500
Hz
1k
2k
5k
10k
20k
50
100
200
5 00
Hz
1k
2k
5 k
10k
20k
Figure 43
Figure 44
Supply Ripple Rejection
Ratio vs Frequency
Supply Ripple Rejection
Ratio vs Frequency
+0
+0
T
T
T
T
-10
-20
-30
-10
-20
-30
VDD=5V
VDD=5V
HP-IN
RL=4
RL=4
Ω
CB=4.7uF
Ω
-40
-50
-40
-50
CB=4.7uF
d
B
d
B
BTL
-60
-70
-80
-90
-60
-70
-80
-90
SE
-100
20
-100
20
5 0
1 00
2 00
500
1k
2k
5k
10k
20k
5 0
1 00
200
500
Hz
1k
2k
5k
10k
20k
Hz
Figure 45
Figure 46
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.6
Aug 04, 2005
11
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
