G1428 Datasheet, PDF (7/16 Pages) Global Mixed-mode Technology Inc – 2W Stereo Audio Amplifier

Global Mixed-mode Technology Inc.
G1428
Supply Ripple Rejection Ratio
vs Frequency
+0_{T T}
-10
-20
-30
T
T
VDD=5V
RL=8Ω
Cb=1µF
BTL
T
TT
-40
d
-50
B
-60
Av=-24V/V
-70
-80
Av=-2V/V
-90
-100
20
50
100
200
5 00
1k
2k
Hz
Figure 23
5k
10k 20 k
+0
-10
-20
-30
-40
d
-50
B
-60
-70
-80
-90
-100
20
Supply Ripple Rejection Ratio
vs Frequency
VDD=5V
RL=8Ω
Cb=1µF
SE
50
100
200
5 00
1k
2k
Hz
Figure 24
5k
10k 20 k
-20 _T
-25
-30
-35
-40
-45
-50
-55
d
-60
B
-65
-70
-75
-80
-85
-90
-95
-100
20
Channel Separation
VDD=5V
Po=1W
RL=8Ω
BTL,Av=-2V/V
L TO R
R TO L
50
100
200
5 00
1k
2k
5k
Hz
Figure 25
10k 20 k
5 00u
4 00u
3 00u
2 00u
1 00u
V
70u
60u
50u
40u
30u
20u
Output Noise vs Frequency
VDD=5V
RL=4Ω
BTL,Av=-2V/V
A-Weighted filter
10u
20
50
100
200
5 00
1k
2k
Hz
5k
10k 20 k
Figure 27
+0
-10
-20
-30
-40
-50
d
-60
B
-70
-80
-90
-100
-110
-120
20
Channel Separation
VDD=5V
Vo=1Vrms
RL=10kΩ
SE,Av=-1V/V
L TO R
R TO L
50
100
200
5 00
1k
2k
Hz
Figure 26
5k
10k 20 k
Output Power vs Load Resistance
2.5
2
VDD=5V
THD+N=1%
BTL
1.5
Each Channel
1
0.5
0
0
10
20
30
40
Load Resistance(Ω)
Figure 28
Ver: 1.2
Mar 31, 2005
TEL: [phone]
http://www.gmt.com.tw
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