j
HAEDPHONE AMPLIFIER for CD-ROM
s
GENERAL DESCRPTION
The
NJM2769A
is a headphone amplifier designed for CD-
ROM.
It includes 6dB closed loop gain and mute circuit
which
require few external component.
The
NJM2769A
realizes very low turn-noise at mute mode.
It is suitable for CD-ROM , and other general audio
headphone amplifier application.
s
PACKAGE OUTLENE
NJM2769A
NJM2769AM
s
FEATURES
q
q
q
q
q
q
q
Operating Voltage
4.5-5.5V
+
Operating Current
2mA typ., at V =5V
Fixed Gain
6dB typ.
Stereo Headphone Output
Internal Mute Circuit
Bipolar Technology
Package Outline
DMP8
s
PIN CONFIGURATION
PIN FUNCTION
1.OUT1
2.MUTE
3.IN1
4.GND
5.IN2
6.BIAS
7.OUT2
+
8.V
1
2
3
4
8
7
6
5
s
BLOCK DIAGRAM
8
7
6
BIAS
5
MUTE
1
2
3
4
j
s
ABSOLUTE MAXMUM RANGE
(Ta=25°C)
PARAMETER
Supply Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
(note)At on PC board
SYMBOL
V
+
NJM2769A
RATINGS
+7
(DMP8) 375
750 (note)
-40 to +85
-50 to +150
UNIT
V
mW
°C
°C
P
D
Topr
Tstg
+
s
ELECTRICAL CHARACTERISTICS
(V =5.0V,Vin=-6dBV,f=1kHz,R
L
=32Ω,Ta=25°C unless otherwise specified)
PARAMETER
Operating Voltage
Operating Current
Reference Voltage
Closed Loop Gain
Channel Balance
Output Power
SYMBOL
V
+
TEST CONDITIONS
MIN.
4.5
TYP.
5.0
2.0
2.1
6
0
50
100
0.02
-98
(12.6)
-80
80
65
-
-
MAX.
5.5
4.0
-
7
+0.5
-
-
0.1
UNIT
V
mA
V
dB
dB
mW
mW
%
I
CC
Vref
G
V
∆G
V
P
O
1
P
O
2
No Signal
No Signal
-
-
5
-0.5
R
L
=32Ω, THD=0.1%
R
L
=16Ω, THD=0.1%
30
40
-
Total Harmonic Distortion
Output Noise Voltage
Mute Attenuation
Channel Separation
Ripple Rejection Ratio
Input Voltage H-level
Input Voltage L-level
THD
Vno
ATT
CS
RR
V
IH
V
IL
Vripple=-20dBV, Rg=0Ω
Rg=0Ω, A-Weighted
Vo/Vin
-
-
65
-
2.0
0.0
dBV
-88
(39.8) (µVrms)
-70
-
-
V
+
dB
dB
dB
V
V
0.3
s
COMTROL PIN INFOMETION
PARAMETER
MUTE ON
MUTE OFF
CONTROL SIGNAL
L
H
OPERATING CONDITION
NON-SIGNAL
OUTPUT SIGNAL
j
s
TYPICAL APPLICATION
NJM2769A
100uF
V
16Ω/32Ω
Ω Ω
SPEAKER
100uF
+
47uF
OUT2
8
7
BIAS
6
BIAS
IN2
5
V
+
2
1
16Ω/32Ω
Ω Ω
SPEAKER
1
OUT1
MUTE
H:SPEAKER Active
L:SPEAKER Mute
100kΩ
Ω
1uF
mute
2
3
MUTE
IN1
4
GND
1 F
MEMO
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
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