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PDF G1420 Data sheet ( Hoja de datos )
| Número de pieza | G1420 | |
| Descripción | 2W Stereo Audio Amplifier | |
| Fabricantes | Global Mixed-mode Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de G1420 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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Global Mixed-mode Technology Inc.
2W Stereo Audio Amplifier
G1420
Features
Depop Circuitry Integrated
Output Power at 1% THD+N, VDD=5V
--1.8W/CH (typical) into a 4Ω Load
--1.2W/CH (typical) into a 8Ω Load
Bridge-Tied Load (BTL), Single-Ended (SE)
Stereo Input MUX
Mute and Shutdown Control Available
Surface-Mount Power Package
24-Pin TSSOP-P
www.DataSheet4U.com
Applications
Stereo Power Amplifiers for Notebooks or
Desktop Computers
Multimedia Monitors
Stereo Power Amplifiers for Portable Audio
Systems
General Description
G1420 is a stereo audio power amplifier in 24pin
TSSOP thermal pad package. It can drive 1.8W con-
tinuous RMS power into 4Ω load per channel in
Bridge-Tied Load (BTL) mode at 5V supply voltage. Its
THD is smaller than 1% under the above operation
condition. To simplify the audio system design in the
notebook application, G1420 supports the Bridge-Tied
Load (BTL) mode for driving the speakers, Single-End
(SE) mode for driving the headphone. G1420 can
mute the output when Mute-In is activated. For the low
current consumption applications, the SHDN mode is
supported to disable G1420 when it is idle. The current
consumption can be further reduced to below 5µA.
G1420 also supports two input paths, that means two
different gain loops can be set in the same PCB and
choosing either one by setting HP/ LINE pin. It en-
hances the hardware designing flexibility.
Ordering Information
ORDER
NUMBER
G1420F31U
Note: F3: TSSOP-24 (FD)
U: Tape & Reel
ORDER NUMBER
(Pb free)
G1420F31Uf
Pin Configuration
TEMP.
RANGE
-40°C to +85°C
PACKAGE
TSSOP-24 (FD)
GND/HS 1
TJ 2
LOUT+ 3
LLINEIN 4
LHPIN 5
LBYPASS 6
LVDD 7
SHUTDOWN 8
MUTE OUT 9
LOUT- 10
MUTE IN 11
GND/HS 12
G1420
24 GND/HS
23 NC
22 ROUT+
21 RLINEIN
20 RHPIN
19 RBYPASS
18 RVDD
17 NC
16 HP/LINE
15 ROUT-
14 SE/BTL
13 GND/HS
Thermal
Pad
Top View
TSSOP-24 (FD)
Bottom View
Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation.
14
Ver: 1.5
Aug 04, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
1
1 page  
Global Mixed-mode Technology Inc.
G1420
Total Harmonic Distortion Plus
Noise vs Output Frequency
10
5 VDD=5V
RL=4Ω
2 BTL
Av=-2V/V
1
Po=0.25W
Po=1.5W
0.5
%
0.2
0.1 Po=0.75W
0 .05
www.DataSheet4U.com
0 .02
0 .01
20
50 10 0 2 00
5 00
Hz
1k
2k
Figure 5
5 k 10 k 20k
Total Harmonic Distortion Plus
Noise vs Output Power
10
5
20kHz
2
1
VDD=5V
RL=8Ω
BTL
Av=-2V/V
0.5
%
0.2 1kHz
0.1
0 .05
20Hz
0 .02
0 .01
3 m 5 m 10m 20m
5 0m
1 00m
W
20 0m
500 m
1
23
Figure 6
10
5
2
1
0.5
%
0.2
0.1
0 .05
Total Harmonic Distortion Plus
Noise vs Output Frequency
VDD=5V
RL=8Ω
BTL
Av=-2V/V
Po=0.25W
Po=1W
Po=0.5W
0 .02
0 .01
20
50 10 0 2 00
5 00
Hz
1k
2k
Figure 7
5 k 10 k 20k
Total Harmonic Distortion Plus
Noise vs Output Frequency
10
5 VDD=5V
RL=8Ω
2 BTL
1 Po=1W
Av=-4V/V
0.5
%
0.2
Av=-2V/V
0.1
0 .05
Av=-1V/V
0 .02
0 .01
20
50 10 0 2 00
5 00
Hz
1k
2k
Figure 8
5 k 10 k 20k
Total Harmonic Distortion Plus
Noise vs Output Power
10
5
20kHz
2
1
0.5
%
0.2
1kHz
0.1
VDD=3.3V
0.05 RL=3Ω
BTL
0 .02
20Hz
0 .01
1m
2m
5m 1 0m 20 m
50 m 10 0m 2 00 m
W
500 m 1
Figure 9
Ver: 1.5
Aug 04, 2005
Total Harmonic Distortion Plus
Noise vs Output Power
10
5
20kHz
2
1
0.5
%
0.2
1kHz
0.1
VDD=3.3V
0.05 RL=4Ω
BTL
0 .02
20Hz
0 .01
1m
2m
5m 1 0m 20 m
50 m 10 0m 2 00 m
W
500 m 1
Figure 10
TEL: 886-3-5788833
http://www.gmt.com.tw
5
5 Page 
Global Mixed-mode Technology Inc.
G1420
Crosstale vs Frequency
-30
-35
-40
-45
-50
-55
-60
d
B
-65
-70
-75
-80
-85
www.DataSheet4U.com-90
-95
-1 00
20
VDD=3.3V
Po=35mW
RL=32Ω
SE
50 10 0
20 0
R to L
50 0
Hz
1k
2k
L to R
5k 10 k 20k
Figure 41
Closed Loop Response
Figure 42
Closed Loop Response
Closed Loop Response
Figure 43
Closed Loop Response
Figure 45
Ver: 1.5
Aug 04, 2005
Figure 44
Supply Current vs Supply Voltage
10
9
8
7 Stereo BTL
6
5
Stereo SE
4
3
2
1
0
34 5
Supply Voltage (V)
6
Figure 46
TEL: 886-3-5788833
http://www.gmt.com.tw
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet G1420.PDF ] | |
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