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Details, datasheet, quote on part number:NJM2768
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Datasheet text preview:
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HAEDPHONE AMPLIFIER for CD-ROM
s GENERAL DESCRPTION
The NJM2768 is a headphone amplifier designed for CDROM. It includes 0dB closed loop gain and mute circuit which require few external component. The NJM2768 realizes very low turn-noise at mute mode. It is suitable for CD-ROM , and other general audio headphone amplifier application. s PACKAGE OUTLENE
NJM2768
NJM2768M
s FEATURES
qOperating Voltage qOperating Current qFixed Gain qStereo Headphone Output qInternal Mute Circuit qBipolar Technology qPackage Outline 4.5-5.5V + 2mA typ., at V =5V 0dB typ.
DMP8
s PIN CONFIGURATION
1 2 3 4 8 7 6 5
PIN FUNCTION 1.OUT1 2.MUTE 3.IN1 4.GND 5.IN2 6.BIAS 7.OUT2 + 8.V
s BLOCK DIAGRAM
8
7
6 BIAS
5
MUTE 1 2 3 4
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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
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NJM2768
RATINGS +7 (DMP8) 375 750 (note) -40 to +85 -50 to +150
UNIT V mW °C °C
PD Topr Tstg
+ s ELECTRICAL CHARACTERISTICS (V =5.0V,Vin=0dBV,f=1kHz,RL=32,Ta=25°C unless otherwise specified)
PARAMETER Operating Voltage Operating Current Reference Voltage Closed Loop Gain Channel Balance Output Power Total Harmonic Distortion Output Noise Voltage Mute Attenuation Channel Separation Ripple Rejection Ratio Input Voltage H-level Input Voltage L-level
SYMBOL V
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TEST CONDITIONS No Signal No Signal
MIN. 4.5 -1 -0.5
TYP. 5.0 2.0 2.1 0 0 50 100 0.02 -104 (6.3) -80 110 70 -
MAX. 5.5 4.0 1 +0.5 0.1
UNIT V mA V dB dB mW mW %
I CC Vref GV GV PO1 PO2 THD Vno ATT CS RR VIH VIL
RL=32, THD=0.1% RL=16, THD=0.1%
30 40 -
Rg=0, A-Weighted Vo/Vin
90 2.0 0.0
dBV -94 (20) (µVrms) -70 V
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dB dB dB V V
Vripple=-20dBV, Rg=0
0.3
s COMTROL PIN INFOMETION
PARAMETER MUTE ON MUTE OFF CONTROL SIGNAL L H OPERATING CONDITION NON-SIGNAL OUTPUT SIGNAL
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s TYPICAL APPLICATION
NJM2768
100uF V 16 /32 SPEAKER 100uF
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47uF
8
OUT2
7
BIAS 6 BIAS
IN2 5 V
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2 1
16 /32 SPEAKER 1 OUT1 MUTE H:SPEAKER Active L: SPEAKER Mute 100k
mute 2 MUTE
1uF
3 IN1
4 GND 1F
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