G1421 Datasheet, PDF (11/24 Pages) Global Mixed-mode Technology Inc – 2W Stereo Audio Amplifier with No Headphone Coupling Capacitor Function

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