Document
Global Mixed-mode Technology Inc.
Stereo Headphone Power Amplifier
Features
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 16Ω loads & 75mW into 32Ω 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.
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
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Applications
CD-ROM DVD-ROM CD-R/W MP3 Portable Stereo
Ordering Information
ORDER MARKING NUMBER
G1402P1X G1402P1Xf G1402 G1402
TEMP. RANGE
PACKAGE
-40°C to +85°C SOP-8L -40°C to +85°C 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
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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 3.9kΩ 220µF + RL VOUTA
100kΩ
VINA
2.2µF
3.9kΩ
2 3 5
1 _ +
8
G1402
+ 3.9kΩ _ 7 4
+
C6 100µF
VINB
2.2µF 3.9kΩ
6
1µF
100kΩ 220µF + 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 = 5kΩ THD+N <0.1% closed-loop Sourcing current = 100mA Sinking current = 100mA fi = 1kHz; Vripple(rms) = 100mVrms RL=32Ω,Cb=1µF, PO=70mW note 2 open-loop; RL = 5kΩ note 1; RL = 16Ω ; f=1kHz note 1; RL = 32Ω ; f=1kHz 0 60 5.0 5.0 2.5 -2.5 3.0 15 90 .