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Global Mixed-mode Technology Inc.
Stereo Headphone Power Amplifier
Features
High performance Class AB amplifier High signal-to-noise ratio Low distortion Low power consumption Large output voltage swing Excellent power supply ripple rejection 3.0V to 6.5V supply voltage range Surface-Mount package-SOP 8
G1402
General Description
The G1402 is an output rail-to-rail stereo audio power amplifier housed in a 8-pin SOP package capable of delivering 125mW of continuous power into 16 loads & 75mW into 32 loads with the THD <0.1% per channel. The gain setting of the amplifiers can simply achieve by setting two external resistors RI (input resistor) & RF (feedback resistor) promptly. The G1402 is a dual channel, low voltage, low power, and high performance amplifiers. The quiescent current is 3mA @ 5V typically. With excellent AC performance (small THD), it can be designed into a wide range of headphone driving applications.
Applications
CD-ROM DVD-ROM CD-R/W MP3 Portable Stereo
Ordering Information
ORDER MARKING NUMBER
G1402P1X G1402P1Xf G1402 G1402
TEMP. RANGE
PACKAGE
-40C to +85C SOP-8L -40C to +85C SOP-8L (Pb free)
Note: X Specify the packing type U: Tape & Reel T: Tube
Pin Configuration
G1402
OUTA INA(neg) INA(pos) VSS 1 2 3 4 8 7 6 5 VDD OUTB INB(neg) INB(pos)
SYMBOL
OUTA INA(neg) INA(pos) VSS INB(pos) INB(neg) OUTB VDD
PIN
1 2 3 4 5 6 7 8
DESCRIPTION
output A inverting input A non-inverting input A negative supply non-inverting input B inverting input B output B positive supply
Ver: 1.2 Jun 28, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
Block Diagram
G1402
OUTA INA(neg) INA(pos) 1 2 3 8 VDD
G1402
_ _
7
_
OUTB INB(neg) INB(pos)
+ + +
6 5
VSS
4
Absolute Maximum Ratings (Note1)
SYMBOL
VDD Tstg Tamb ESD
PARAMETER
Supply voltage Storage temperature Operating ambient temperature ESD voltage HBM
CONDITION
MIN
0 -65 -40 -
MAX
7.0 +150 +85 2
UNIT
V C C KV
Notes: 1. Absolute Maximum Ratings are limits beyond which damage to the device may occur.
Thermal Characteristics
SYMBOL
Rth j-a
PARAMETER
Thermal resistance from junction to ambient in free air SO8
VALUE
240
UNIT
C/W
Test and Application Information
VDD 3.9k 220F + RL VOUTA
100k
VINA
2.2F
3.9k
2 3 5
1 _ +
8
G1402
+ 3.9k _ 7 4
+
C6 100F
VINB
2.2F 3.9k
6
1F
100k 220F + RL
VOUTB
Fig.1 Measurement circuit for inverting application
Ver: 1.2 Jun 28, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Electrical Characteristics
SYMBOL
Supplies VDD Supply voltage Single Dual VSS IDD Negative supply voltage Supply current no load no load 3.0 3.0 1.5 -1.5 -50 RL = 5k THD+N <0.1% closed-loop Sourcing current = 100mA Sinking current = 100mA fi = 1kHz; Vripple(rms) = 100mVrms RL=32,Cb=1F, PO=70mW note 2 open-loop; RL = 5k note 1; RL = 16 ; f=1kHz note 1; RL = 32 ; f=1kHz 0 60 5.0 5.0 2.5 -2.5 3.0 15 90 70 0.1 0.4 0.5 70 65 < 0.1 5 125 75
G1402
MIN TYP MAX
6.5 6.5 3.25 -3.25 5.0 25 50 3.5 1 1 -
VDD = 5V; VSS = 0V; TA = 25C; fI= 1kHz; RL = 32 connected to VDD/2; unless otherwise specified. PARAMETER CONDITION UNIT
V V V V mA mW mV V dB mA
Ptot Total power dissipation DC Characteristics VI(OS) VCM GV IO RO VDD-VOH VOL-VSS PSRR CS Input offset voltage Common mode voltage Open-loop voltage gain Maximum output current Output resistance Output Voltage Swing High Output Voltage Swing Low Power supply rejection ratio
V V dB dB % MHz mW mW
Channel separation AC Characteristics THD fG PO Total harmonic distortion Unity gain frequency Maximum output power
Notes: 1. Values are proportional to VDD; THD+N < 0.1% 2. VDD = 5.0V; VO(P-P) = 4.0V (at 0 dB)
Ver: 1.2 Jun 28, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Electrical Characteristics
G1402
THD+N vs Frequency
CIN=2.2F, COUT=330F, Cb=1F, Av=1, Ri=18k, Rf=18k ; Av=-2, Ri=18k, Rf=36k ; Av=-4, Ri=9k,Rf=36k,TA=25C
THD+N vs Output Power
10 5 10 5
2
VDD=5V RL=32 Av=-1
2
VDD=5V RL=32 Po=50mW Av=-4V/V Av=-2V/V
1
1
0.5 % 0.2
0.5
20kHz
% 0.2
0.1
0.1
0.05
1kHz 20Hz
2m 5m 10m W 20m 50m 100m 200m
0.05
0.02
0.02
Av=-1V/V
50 100 200 500 Hz 1k 2k 5k 10k 20k
0.01 1m
0.01 20
THD+N vs Frequency
10 10 5 5
THD+N vs Output Power
VDD=5V RL=16 Av=-1
2
1
VDD=5V RL=32 Av=-1
2
1
0.5 % 0.2 %
0.5
20kHz 1kHz
0.2
0.1
Po=70mW
0.1
0.05
0.05
0.02
Po=60mW
50 100 200 500 Hz 1k 2k 5k 10k 20k
20Hz
0.02 0.01 2m
0.01 20
5m
10m
20m W
50m
100m
200m
THD+N vs Frequency
10 10 5
THD+N vs Output Power
5
2
VDD=5V RL=16 Po=50mW Av=-4V/V Av=-2V/V
%
2
VDD=3.3V RL=32 Av=-1
1
1
0.5 % 0.2
0.5
20kHz 1kHz
0.2
0.1
0.1
0.05
0.05
0.02
Av=-1V/V
50 100 200 500 Hz 1k 2k 5k 10k 20k
0.02
20Hz
2m 5m 10m W 20m 50m 100m
0.01 20
0.01 1m
Ver: 1.2 Jun 28, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Electrical Characteristics (continued)
THD+N vs Frequency
10 10 5
G1402
THD+N vs Output Power
VDD=3.3V RL=16 Av=-1 20kHz 20Hz 1kHz
2
1
VDD=3.3V RL=32 Po=25mW Av=-4V/V
%
5
2
1
0.5 % 0.2
0.5
Av=-2V/V
0.2
0.1
0.1
0.05
0.05
0.02
Av=-1V/V
50 100 200 500 Hz 1k 2k 5k 10k 20k
0.02
0.01 20
0.01 2m
3m
4m
5m 6m 7m
10m W
20m
30m
40m 50m
70m 100m
THD+N vs Frequency
10 100u 90u 5 80u 70u 60u 50u
Output Noise
VDD=5V RL=32 Av=-1 Cb=1F
2
VDD=3.3V RL=16 Po=25mW Av=-4V/V Av=-2V/V
V
1
BW=20kHz , No filters
40u
0.5 % 0.2
30u
0.1 20u 0.05
A- Weighting
Av=-1V/V
0.02
0.01 20
50
100
200
500 Hz
1k
2k
5k
10k
20k
10u 20
50
100
200
500 Hz
1k
2k
5k
10k
20k
Channel Separation
-20 -25 -30 -35 -40 -45 -50 -55 d B -60 -65 -70 -75 -80 -85 -90 -95 -100 20 50 100 200 500 Hz 1k 2k 5k 10k 20k -110 -120 20 +0
Power Supply Rejection Ratio
TTTTTTTTTTTTTTTTTTT
-10 -20 -30 -40
VDD=5V RL=32 Av=-1 Po=70mW Cb=1F
Channel A to B
d B
-50 -60 -70 -80 -90 -100
VDD=5V RL=32 Av=-1 Vripple=100mVrms Cb=1F Vpin 3,5=2.5V FORCED
Channel B to A
50
100
200
500 Hz
1k
2k
5k
10k
20k
Ver: 1.2 Jun 28, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Electrical Characteristics (continued)
Open Loop Frequency Response
G1402
Ver: 1.2 Jun 28, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Electrical Characteristics (continued)
Supply Current vs.Supply Voltage
2.6 2.4 Supply Current (mA) Supply Current (mA) 2.2 2 1.8 1.6 1.4 1.2 1 2.5 3.5 4.5 5.5 Supply Voltage(V) 6.5 2.4 2.2 2 1.8 1.6 1.4 1.2 1 -50 -25 0 VDD=5V
G1402
Supply Current vs. Temperature
VDD=3V
25 50 75 Temperature (C)
100
125
Offset Voltage vs. Supply Voltage
5 4.8 Offset Voltage (mV) 4.4 4.2 4 3.8 3.6 3.4 3.2 3 2.5 3.5 4.5 5.5 Supply Voltage (V) 6.5 Offset Voltage (mV) 4.6 5 4.5 4 3.5
Offset Voltage vs.Temperature
VDD=3V
VDD=5V 3 2.5 2 -50 -25 0 25 50 75 Temperature (C) 100 125
Sinking Current vs. Vo-Vss
350 300 Sinking Current(mA) 250 200 150 100 50 0 0 0.5 1 1.5 2 VO-Vss(V) 2.5 3 VDD=3V VDD=5V Sourcing Current(mA) 350 300 250 200 150 100 50 0 0
Sourcing Current vs. VDD-Vo
VDD=5V
VDD=3V
0.5
1
1.5 2 VDD - VO(V)
2.5
3
Ver: 1.2 Jun 28, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
7
Global Mixed-mode Technology Inc.
Package Information
C
G1402
E
H
L D 7 (4X)
A2 y B A1
A
e
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 A1 A2 B C D E e H L y
MIN.
1.35 0.10 ----0.33 0.19 4.80 3.80 ----5.80 0.40 ----0
DIMENSION IN MM NOM.
1.60 ----1.45 ----------------1.27 -----------------
MAX.
1.75 0.25 ----0.51 0.25 5.00 4.00 ----6.20 1.27 0.10 8
MIN.
0.053 0.004 ----0.013 0.007 0.189 0.150 ----0.228 0.016 ----0
DIMENSION IN INCH NOM.
0.063 ----0.057 ----------------0.050 -----------------
MAX.
0.069 0.010 ----0.020 0.010 0.197 0.157 ----0.244 0.050 0.004 8
Taping Specification
Feed Direction Typical SOP Package Orientation
GMT Inc. does 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: 1.2 Jun 28, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
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