G1421 Datasheet, PDF (12/24 Pages) Global Mixed-mode Technology Inc – 2W Stereo Audio Amplifier with No Headphone Coupling Capacitor Function

Global Mixed-mode Technology Inc.
G1421
Supply Ripple Rejection
Ratio vs Frequency
+ 0_T
-10 _VDD=3.3V
-20 ^RL=4Ω
CB=4.7uF
-30
-40
d
-50
B
-60
BTL
-70
-80
-90
SE
-1 00
20
50
1 00
2 00
5 00
1k
2k
Hz
5k
10k 20k
Figure 47
Crosstalk vs Frequency
-20
-25
-30 ^VDD=5V
-35 Po=1.5W
-40 RL=4_Ω
-45 _BTL
-50
-55
d
-60
B
-65
L to R
-70
-75
-80
-85
R to L
-90
-95
-100
20
50 100 200
500 1k
2k
Hz
Figure 48
5k 10k 20k
-20
-25
-30
-35
-40
-45
-50
-55
d
-60
B
-65
-70
-75
-80
-85
-90
-95
-100
20
Crosstalk vs Frequency
VDD=3.3V
Po=0.75W
RL=4Ω
BTL
L to R
R to L
50 100 200
500 1k
2k
5k
Hz
Figure 49
10k 20k
Crosstalk vs Frequency
-30
-35
VDD=5V
-40
Po=75mW
-45
RL=32Ω
-50
-55
SE
-60
d
B
-65
-70
-75
-80
-85
-90
-95
-1 00
20
50
10 0 20 0
50 0
1k
2k
Hz
Figure 50
R to L
L to R
5k
10 k 20k
Crosstalk vs Frequency
-30
-35 _VDD=3.3V
-40 _Po=35mW
-45 _RL=32Ω
-50
SE
-55
-60
d
B
-65
-70
R to L
-75
-80
-85
-90
L to R
-95
-1 00
20
50
10 0 20 0
50 0
1k
2k
Hz
Figure 51
5k
10 k 20k
Crosstalk vs Frequency
-2 0
-2 5
-30 _VDD=5V
-35 _Po=75mW
-40 _RL=32Ω
-4 5
-50 ^HP-IN
R to L
-5 5
d
-6 0
B
-6 5
-7 0
-7 5
L to R
-8 0
-8 5
-9 0
-9 5
-10 0
20
50
100
20 0
50 0
1k
2k
5k
Hz
Figure 52
10 k 20 k
Ver: 1.6
Aug 04, 2005
TEL: [phone]
http://www.gmt.com.tw
12