NJM2768 [NJRC]
HAEDPHONE AMPLIFIER for CD-ROM; HAEDPHONE放大器， CD -ROM
| 型号： | NJM2768 |
| 厂家： | 
NEW JAPAN RADIO |
| 描述： | HAEDPHONE AMPLIFIER for CD-ROM |
| 文件： | 总4页 (文件大小：104K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NJM2768
j
HAEDPHONE AMPLIFIER for CD-ROM
■ GENERAL DESCRPTION
■ PACKAGE OUTLENE
The NJM2768 is a headphone amplifier designed for CD-
ROM.
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.
NJM2768M
■ FEATURES
■Operating Voltage
■Operating Current
■Fixed Gain
4.5-5.5V
2mA typ., at V+=5V
0dB typ.
■Stereo Headphone Output
■Internal Mute Circuit
■Bipolar Technology
■Package Outline
DMP8
■ 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
■ BLOCK DIAGRAM
6
5
4
8
1
7
BIAS
MUTE
2
3
NJM2768
j
■ ABSOLUTE MAXMUM RANGE (Ta=25°C)
PARAMETER
Supply Voltage
SYMBOL
V+
RATINGS
UNIT
V
+7
(DMP8) 375
Power Dissipation
PD
mW
750 (note)
Operating Temperature Range
Storage Temperature Range
(note)At on PC board
Topr
Tstg
-40 to +85
°C
°C
-50 to +150
■ ELECTRICAL CHARACTERISTICS (V+=5.0V,Vin=0dBV,f=1kHz,RL=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. MAX. UNIT
5.0
2.0
2.1
0
5.5
4.0
-
V
mA
V
ICC
No Signal
No Signal
Vref
GV
-
-1
1
dB
dB
mW
mW
%
-0.5
30
40
-
0
+0.5
-
∆GV
PO1
PO2
THD
50
RL=32Ω, THD=1%
RL=16Ω, THD=1%
100
0.02
-
Total Harmonic Distortion
Output Noise Voltage
0.1
dBV
(µVrms)
-104
(6.3)
-94
(20)
Vno
-
Rg=0Ω, A-Weighted
Mute Attenuation
ATT
CS
RR
VIH
Vo/Vin
-
-80
110
70
-
-70
-
dB
dB
dB
V
Channel Separation
Ripple Rejection Ratio
Input Voltage H-level
Input Voltage L-level
90
-
-
V+
Vripple=-20dBV, Rg=0Ω
2.0
0.0
VIL
-
0.3
V
■ COMTROL PIN INFOMETION
PARAMETER
MUTE ON
CONTROL SIGNAL
OPERATING CONDITION
L
NON-SIGNAL
MUTE OFF
H
OUTPUT SIGNAL
NJM2768
j
■ TYPICAL APPLICATION
100uF
47uF
BIAS
IN2
V+
OUT2
8
7
6
5
V+
16Ω/32Ω
SPEAKER
BIAS
2
100uF
1
16Ω/32Ω
SPEAKER
mute
2
4
1
OUT1
3
IN1
MUTE
GND
MUTE
1
F
100kΩ
H:SPEAKER Active
L: SPEAKER Mute
1uF
NJM2768
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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