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Global Mixed-mode Technology Inc.
G1412
Ground-Reference Popless Stereo Headphone Driver
Features
„ 7mA Quiescent Current.
„ Ground-Referenced Outputs Eliminate DC-Bias
Voltages on Headphone Ground Pin
„ Popless Function Embedded
„ 70mW Per Channel into 16Ω loads
„ Low Distortion
„ Large Output Voltage Swing.
„ ±1.8V to ±3.6V Dual Power Operating Range
„ Low Power Consumption.
„ Over-Temperature Protection
„ UVLO Embedded
„ TDFN2X2-8 &TQFN3X3-16 Packages
Applications
„ Cellular Phone
„ Notebooks
„ PDAs
„ MP3 Players
„ Portable Audio Equipment
General Description
The G1412 stereo headphone driver is designed for
portable equipment where board space is limited. The
G1412 uses the dual external power supplies
PVDD/NVDD to produce a ground-reference output,
eliminating the need for large DC-blocking capacitors,
saving cost, board space, and component height.
The G1412 is a dual channel, low voltage, low power,
and high performance amplifiers, which can deliver up
to 70mW per channel into a 16Ω load with small THD+N
performance.
The G1412 operates from a dual ±1.8V to ±3.6V sup-
plies, consumes only 7mA of supply current. With ex-
cellent AC performance (small THD), it can be designed
into a wide range of headphone driving application.
Ordering Information
ORDER
NUMBER
G1412RC1U
G1412R41U
Note: RC :TDFN2X2-8
1: Bonding Code
U: Tape & Reel
MARKING
1412
1412
R4:TQFN3X3-16
TEMP.
RANGE
-40°C ~ +85°C
-40°C ~ +85°C
PACKAGE
(Green)
TDFN2X2-8
TQFN3X3-16
REMARK
OBSOLETE
Pin Configuration
G1412
PGND 1
OUTL 2
NVDD 3
OUTR 4
Thermal
Pad
8 PVDD
7 INL
6 INR
5 SHDN
TDFN2X2-8
Typical Application Circuit
LEFT AUDIO
INPUT
RI
RF
LEFT AUDIO
OUTPUT
+
PGND 13
NC 14
PVDD 15
SHDNL 16
Thermal
Pad
8 INR
7 OUTR
6 SVSS
5 OUTL
RIGHT AUDIO
INPUT
RI
GAIN = - ( RF )
RI
+
RIGHT AUDIO
OUTPUT
RF
G1412 TQFN3X3-16
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
Ver: 1.5
Sep 30, 2009
1
TEL: 886-3-5788833
http://www.gmt.com.tw