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
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.
Applications
Cellular Phone
Notebooks
PDAs
MP3 Players
Portable Audio Equipment
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
OUTL
NVDD
OUTR
1
2
3
4
Thermal
Pad
8
7
6
5
PVDD
INL
INR
SHDN
Typical Application Circuit
R
F
R
I
TDFN2X2-8
NVDD
NC
NC
NC
LEFT AUDIO
INPUT
LEFT AUDIO
OUTPUT
+
+
RIGHT AUDIO
OUTPUT
12
11
10
9
R
I
8
7
6
5
INR
OUTR
SVSS
OUTL
GAIN =
-
(
R
F
R
I
)
RIGHT AUDIO
INPUT
PGND
NC
PVDD
SHDNL
13
14
15
16
1
2
3
4
Thermal
Pad
R
F
SHDNR
SGND
SVDD
G1412 TQFN3X3-16
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
Ver: 1.5
Sep 30, 2009
INL
TEL: 886-3-5788833
http://www.gmt.com.tw
1
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