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Global Mixed-mode Technology Inc.
G1401
Stereo Headphone Power Amplifier
Features
Class AB amplifier
High performance
High signal-to-noise ratio
Low distortion
Low power consumption
Large output voltage swing
Excellent power supply ripple rejection
3.0V to 7.0V supply voltage range
Surface-Mount package-SOP 8
Applications
CD-ROM
DVD-ROM
CD-R/W
MP3
Portable Stereo
Earphone for cellular phone
Pin Configuration
General Description
The G1401 is a stereo audio power amplifier housed
in a 8-pin SOP package capable of delivering 135mW
of continuous power per channel into 16Ω loads.
Amplifier gain is externally configured by means of two
resistors per input channel.
The G1401 is a dual channel, low voltage, low power,
performance OP amps that can be designed into a
wide range of headphone driving applications, at an
economical price.
Ordering Information
PART TEMP. RANGE PIN-PACKAGE
G1401P1 0°C to +70°C 8 SOP
Pinning
OUTA
INA(neg)
INA(pos)
1
2
3
V
4
SS
Ver 1.1
Aug 13, 2001
G1401
8
7
6
5
V
DD
OUTB
INB(neg)
INB(pos)
SYMBOL PIN DESCRIPTION
OUTA 1 output A
INA(neg) 2 inverting input A
INA(pos) 3 non-inverting input A
VSS 4 negative supply
INB(pos) 5 non-inverting input B
INB(neg) 6 inverting input B
OUTB 7 output B
VDD 8 positive supply
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TEL: 886-3-5788833
http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Block Diagram
OUTA
INA(neg)
G1401
G1401
1
2
_
8
V
DD
INA(pos)
V
SS
+
3
4
_
+
7
6
5
OUTB
INB(neg)
INB(pos)
Absolute Maximum Ratings
(Note1)
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
VDD Supply voltage 0 7.0 V
T
Storage temperature -65 +150 °C
stg
T
Operating ambient temperature 0 +70 °C
amb
ESD ESD voltage HBM - 2 KV
Notes:
1. Absolute Maximum Ratings are limits beyond which damage to the device may occur.
Thermal Characteristics
SYMBOL PARAMETER VALUE UNIT
R
Thermal resistance from junction to ambient in free air SO8 210 °C/W
th j-a
Test and Application Information
V
DD
2.2µF
3.9k
3.9k
Ω
Ω
V
INA
V
ref
(typ. 2.5V )
V
INB
2.2µF
3.9k
Ω
2
_
3
+
5
+
6
_
3.9k
Ω
18
G1401
74
220µF
+
+
220µF
+
C6
100µF
V
OUTA
R
L
V
OUTB
R
L
Ver 1.1
Aug 13, 2001
Fig.1 Measurement circuit for inverting application
2
TEL: 886-3-5788833
http://www.gmt.com.tw
Page 3
Global Mixed-mode Technology Inc.
G1401
Electrical Characteristics
V
= 5V; VSS = 0V ; T
DD
= 25°C; fi = 1kHz; RL = 32
amb
; unless otherwise specified.
ΩΩΩΩ
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Supplies
VDD
VSS Negative supply voltage -1.5 -2.5 -3.5 V
IDD Supply current no load - 3.0 5.5 mA
P
Total power dissipation no load - 15 28 mW
tot
DC Characteristics
V
I(OS)
VCM Common mode voltage 0 - 4.0 V
CMRR Common-Mode Rejection Ratio VCM = 0V to 5V 40 60 dB
GV Open-loop voltage gain
IO Maximum output current THD<0.1% - 100 - mA
RO Output resistance open-loop
VO Output voltage swing
PSRR Power supply rejection ratio fi = 1kHz;
α
CS
AC Characteristics
Supply voltage 3.0 5.0 7.0 V
Single 3.0 5.0 7.0 V
Dual 1.5 2.5 3.5 V
Input offset voltage -15 - 15 mV
R
= 5kΩ
L
= 20Ω
R
L
RL = 32Ω
note 1
= 5kΩ
R
L
note 1
ripple(peak)
= 1V
V
Channel separation - 70 - dB
note 2 THD Total harmonic distortion
70 90 - dB
- 1.78 -
1.0 - 4.0 V
0.1 - 4.9 V
50 62 - dB
Ω
fG Unity gain frequency
PO Maximum output power
B Power bandwidth unity gain inverting - 30 - kHz
Notes:
1. Values are proportional to V
2. V
= 5.0V; V
DD
= 4.0V (at 0 dB)
O(P-P)
; THD < 0.1%
DD
R
= 5kΩ
L
note 2
open-loop; R
note 1; R
= 16Ω
L
= 5kΩ
L
- < 0.1 - %
2.5 3.7 5.0 MHz
- 135 - mW
Ver 1.1
Aug 13, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
3
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Global Mixed-mode Technology Inc.
Output Swing Range Voltage Figure
Test Condition
V+ = 2.5V , V- = - 2.5V , RL=5k
TA = 25°C, AV = -1
：：：：
ΩΩΩΩ
V+ = 1.5V , V- = - 1.5V , RL=5k
G1401
ΩΩΩΩ
V+ = 2.5V , V- = - 2.5V , RL=2k
V+ = 2.5V , V- = - 2.5V , RL=32
ΩΩΩΩ
ΩΩΩΩ
V+ = 1.5V , V- = - 1.5V , RL=2k
V+ = 1.5V , V- = - 1.5V , RL=32
ΩΩΩΩ
ΩΩΩΩ
V+ = 2.5V , V- = - 2.5V , RL=16
Ver 1.1
Aug 13, 2001
ΩΩΩΩ
V+ = 1.5V , V- = - 1.5V , RL=16
4
ΩΩΩΩ
TEL: 886-3-5788833
http://www.gmt.com.tw
Page 5
y
y
Global Mixed-mode Technology Inc.
Input Common Mode Voltage Range Figure
Test Condition
TA = 25°C, AV = 1
：：：：
G1401
V+ = 5V, V- = 0V, RL = 5K
V+ = 3V, V- = 0V, RL = 5k
ΩΩΩΩ
ΩΩΩΩ
Test Condition: Vs = ±2.5V, TA = 25°C
Open-Loop Gain & Phase vs. Frequenc
100.0
80.0
60.0
40.0
Gain - dB
20.0
0.0
0.1 1 10 100 1000 10000
Frequenc
- kHZ
-50
-70
-90
-110
-130
-150
Test Condition: Vs = ±2.5V, TA = 25°C
70.0
60.0
50.0
40.0
30.0
Phase-degree
20.0
10.0
Power Supply Rejection - dB
0.0
0.1 1 10 100 1000
PS RR
Frequency - kHZ
PSRR +
PSRR -
Ver 1.1
Aug 13, 2001
5
TEL: 886-3-5788833
http://www.gmt.com.tw
Page 6
Global Mixed-mode Technology Inc.
Package Information
7
° (4X)
C
E
H
L
D
θ
A2
A
G1401
y
1. Package body sizes exclude mold flash and gate burrs
2. Dimension L is measured in gage plane
3. Tolerance 0.10mm unless otherwise specified
4. Controlling dimension is millimeter converted inch dimensions are not necessarily exact.
SYMBOL
A 1.35 1.60 1.75 0.053 0.063 0.069
A1 0.10 ----- 0.25 0.004 ----- 0.010
A2 ----- 1.45 ----- ----- 0.057 -----
B 0.33 ----- 0.51 0.013 ----- 0.020
C 0.19 ----- 0.25 0.007 ----- 0.010
D 4.80 ----- 5.00 0.189 ----- 0.197
E 3.80 ----- 4.00 0.150 ----- 0.157
e ----- 1.27 ----- ----- 0.050 -----
H 5.80 ----- 6.20 0.228 ----- 0.244
L 0.40 ----- 1.27 0.016 ----- 0.050
y ----- ----- 0.10 ----- ----- 0.004
θ
MIN. NOM. MAX. MIN. NOM. MAX.
0º ----- 8º 0º ----- 8º
e
B
DIMENSION IN MM DIMENSION IN INCH
A1
Taping Specification
Feed Direction
Feed Direction
Typical SOP Package Orientation
Typical SOP Package Orientation
GMT Inc. d oes not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications.
Ver 1.1
Aug 13, 2001
6
TEL: 886-3-5788833
http://www.gmt.com.tw
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