Global Mixed-mode Technology Inc.
Total Harmonic Distortion Plus
Noise vs Output Frequency
10
5
2
1
0.5
0.2
%
0.1
0 .05
0 .02
0 .01
0.0 05
0.0 02
0.0 01
20
V
10 0u
G1421
Output Noise Voltage
vs Frequency
BW=22Hz to 20kHz
VDD=3.3V
RL=32
Ω
SE
Po=10mW
9 0u
8 0u
7 0u
6 0u
5 0u
4 0u
VDD=5V
RL=4
Ω
Vo BTL
3 0u
Po=20mW
2 0u
Vo SE
Po=30mW
50
10 0
2 00
5 00
Hz
1k
2k
5k
10 k
20k
1 0u
20
50
10 0
2 00
5 00
Hz
1k
2k
5k
10 k
20k
Figure 41
Figure 42
Output Noise Voltage
vs Frequency
10 0u
9 0u
8 0u
7 0u
6 0u
5 0u
4 0u
V
10 0u
9 0u
8 0u
7 0u
6 0u
Output Noise Voltage
vs Frequency
VDD=3.3V
RL=4
Ω
BW=22Hz to 20kHz
BW=22Hz to 20kHz
A- Weighted Filter
VDD=5V
HP-IN
RL=4
Ω
5 0u
4 0u
V
Vo BTL
3 0u
3 0u
2 0u
2 0u
Vo SE
1 0u
20
50
1 00
2 00
5 00
Hz
1k
2k
5k
10k
20k
1 0u
20
50
1 00
2 00
5 00
Hz
1k
2k
5k
10k
20k
Figure 43
Figure 44
Supply Ripple Rejection
Ratio vs Frequency
+0
-10
-20
-30
-40
d
B
-50
-60
-70
-80
-90
-1 00
20
d
B
Supply Ripple Rejection
Ratio vs Frequency
+0
T
T
T
T
VDD=5V
RL=4
Ω
CB=4.7uF
-10
-20
-30
-40
-50
-60
-70
-80
-90
-1 00
20
VDD=5V
HP-IN
RL=4
Ω
CB=4.7uF
BTL
SE
50
1 00
2 00
5 00
Hz
1k
2k
5k
10k
20k
50
1 00
2 00
5 00
Hz
1k
2k
5k
10k
20k
Figure 45
Figure 46
Ver: 1.6
Aug 04, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
11
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
