JRC NJM2768M Datasheet
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NJM2768
HAEDPHONE AMPLIFIER for CD-ROM
GENERAL DESCRPTION
■■■■
NJM2768
The
ROM.
It includes 0dB closed loop gain and mute circuit
which require few external component.
NJM2768
The
It is suitable for CD-ROM , and other general audio
headphone amplifier application.
FEATURES
■■■■
●
Operating Voltage 4.5-5.5V
●
Operating Current 2mA typ., at V
●
Fixed Gain 0dB typ.
●
Stereo Headphone Output
●
Internal Mute Circuit
●
Bipolar Technology
●
Package Outline DMP8
PIN CONFIGURATION
■■■■
BLOCK DIAG RAM
■■■■
is a headphone amplifier designed f or CD-
realizes very low turn-noise at mute mode.
+
=5V
1
2
3
4
8
7
6
5
PACKAGE OUTLENE
■
NJM2768M
PIN FUNCTION
1.OUT1
2.MUTE
3.IN1
4.GND
5.IN2
6.BIAS
7.OUT2
+
8.V
8
7
6
5
BIAS
MUTE
1
23
4
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ABSOLUTE MAXMUM RANGE
■■■■
Supply Voltage V
Power Dissipation P
Operating Temperature Range Topr -40 to +85
Storage Temperature Range Tstg -50 to +150
(note)At on PC board
ELECTRICAL CHARACTERISTICS
■■■■
Operating Voltage V
NJM2768
(Ta=25°C)
PARAMETER SYMBOL RATINGS UNIT
+
D
(V+=5.0V,Vin=0dBV,f=1kHz,RL=32Ω,Ta=25°C unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT
+
4.5 5.0 5.5 V
(DMP8) 375
750 (note)
+7 V
mW
°
C
°
C
Operating Current I
Reference Voltage Vref No Signal - 2.1 - V
Closed Loop Gain G
Channel Balance
Output Power PO1
Total Harmonic Distortion THD - 0.02 0.1 %
Output Noise Voltage Vno
Mute Attenuation ATT Vo/Vin - -80 -70 dB
Channel Separation CS 90 110 - dB
Ripple Rejection Ratio RR
Input Voltage H-level V
Input Voltage L-level V
COMTROL PIN INFOMETION
■■■■
PARAMETER CONTROL SIGNAL OPERATING CONDITION
MUTE ON
MUTE OFF
CC
V
∆
G
V
PO2
IH
IL
LNON-SIGNAL
H OUTPUT SIGNAL
No Signal - 2.0 4.0 mA
-1 0 1 dB
-0.5 0 +0.5 dB
R
=32Ω, THD=1%
L
R
=16Ω, THD=1%
L
Rg=0Ω, A-Weighted
Vripple=-20dBV, Rg=0
2.0 - V
0.0 - 0.3 V
Ω
30 50 - mW
40 100 - mW
-
-70-dB
-104
(6.3)
-94
(20)
(µVrms)
+
dBV
V
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