NJM2769B [NJRC]
HEADPHONE AMPLIFIER for CD-ROM; 耳机放大器， CD -ROM
| 型号： | NJM2769B |
| 厂家： | 
NEW JAPAN RADIO |
| 描述： | HEADPHONE AMPLIFIER for CD-ROM |
| 文件： | 总7页 (文件大小：308K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NJM2769B
HEADPHONE AMPLIFIER for CD-ROM
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GENERAL DESCRIPTION
The NJM2769B is a headphone amplifier designed for CD-
ROM.
It includes 6dB closed loop gain and mute circuit, requires
few external component.
The NJM2769B realizes very low turn-noise at mute mode.
It is suitable for CD-ROM, and other general audio
headphone amplifier application.
ꢀ PACKAGE OUTLINE
NJM2769BM
NJM2769BRB1
FEATURES
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Operating Voltage
Operating Current
Fixed Gain
Stereo Headphone Output
Internal Mute Circuit
Bipolar Technology
Package Outline
2.8 to 5.5V
2mA typ. at V+=5V
6dB typ.
DMP8,TVSP8
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
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BLOCK DIAGRAM
8
1
7
6
5
4
BIAS
MUTE
2
3
- 1 -
NJM2769B
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ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
SYMBOL
V+
RATINGS
+7
UNIT
V
Supply Voltage
(DMP8) 375
(TVSP8)320
Power Dissipation
PD
mW
Operating Temperature Range
Storage Temperature Range
Topr
Tstg
-40 to +85
°C
°C
-50 to +150
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ELECTRICAL CHARACTERISTICS (V+=5.0V,Vin=-6dBV,f=1kHz,RL=32Ω,Ta=25°C unless otherwise specified)
PARAMETER
SYMBOL
V+
TEST CONDITIONS
MIN.
2.8
-
TYP. MAX. UNIT
Operating Voltage
Operating Current
Reference Voltage
Closed Loop Gain
Channel Balance
Output Power
5.0
2.0
2.1
6
5.5
4.0
-
V
mA
V
ICC
No Signal
No Signal
Vref
GV
-
5
7
dB
dB
mW
mW
%
-0.5
30
40
-
0
+0.5
-
∆GV
PO1
PO2
THD
50
RL=32Ω, THD=0.1%
RL=16Ω, THD=0.1%
100
0.02
-98
-
Total Harmonic Distortion
Output Noise Voltage
0.1
dBV
-88
Vno
-
Rg=0Ω, A-Weighted
(12.6) (39.8)
(µVrms)
Mute Attenuation
ATT
CS
RR
VIH
Vo/Vin
-
-80
80
65
-
-70
-
dB
dB
dB
V
Channel Separation
Ripple Rejection Ratio
Input Voltage H-level
Input Voltage L-level
65
-
-
V+
Vripple=-20dBV, Rg=0Ω
2.0
0.0
VIL
-
0.3
V
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CONTROL PIN INFORMATION
PARAMETER
MUTE ON
CONTROL SIGNAL
OPERATING CONDITION
L
NON-SIGNAL
MUTE OFF
H
OUTPUT SIGNAL
- 2 -
NJM2769B
TERMINAL DESCRIPTION
PIN
NO.
TERMINAL
VOLTAGE
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
1
7
OUT1
OUT2
OUTPUT1
OUTPUT2
(V+-1VBE)/2
10uA
2
MUTE
MUTE CONTROL
-
350k
50k
50k
3
5
IN1
IN2
INPUT1
INPUT2
(V+-1VBE)/2
BIAS
50k
50k
REFERENCE VOLTAGE
STABILIIZED CAPACITOR
CONNECT TERMINAL
6
BIAS
(V+-1VBE)/2
- 3 -
NJM2769B
TYPICAL APPLICATION
100μF
47μF
BIAS
IN2
5
V+
OUT2
8
6
7
V+
16Ω/32Ω
SPEAKER
BIAS
2
100μF
1
16Ω/32Ω
SPEAKER
mute
2
1
4
3
IN1
GND
OUT1
MUTE
MUTE
1
F
100kΩ
H: SPEAKER Active
L: SPEAKER Mute
1μF
- 4 -
NJM2769B
TYPICAL CHARACTERISTICS
Oprating Current vs. Operating Voltage
Operating Current vs. Ambient Temperature
(MUTE=V+)
4
3.5
3
4
3.5
3
V+=5V
2.5
2
2.5
2
V+=2.8V
1.5
1
1.5
1
0.5
0
0.5
0
-40 -20
0
20 40 60 80 100 120
0
1
2
3
4
5
6
o
Operating Voltage (V)
Ambient Temperature ( C)
Reference Voltage vs. Operating Voltage
Reference Voltage vs. Ambient Temperature
3
2.5
2
3
2.5
V+=5V
2
1.5
1
1.5
V+=2.8V
1
0.5
0
0.5
0
-40 -20
0
20 40 60 80 100 120
0
1
2
3
4
5
6
o
Operating Voltage (V)
Ambient Temperature ( C)
Power Dissipation vs.Output Power
(V+=5V,f=1KHz)
Power Dissipation vs.Output Power
(V+=2.8V,f=1KHz)
400
350
300
250
200
150
100
50
120
100
80
60
40
20
0
RL=16Ω
RL=16Ω
RL=32Ω
RL=32Ω
THD=10%
THD=10%
0
0
20
40
60
80
100 120
0
5
10
15
20
25
Output Power (mW)
Output Power (mW)
- 5 -
NJM2769B
THD+N vs. Output Power
THD+N vs. Output Power
(V+=5V,f=1KHz,RL=16Ω)
(V+=5V,f=1KHz,RL=32Ω)
10
1
10
1
Ta=85oC
Ta=25oC
Ta=-40oC
Ta=85oC
Ta=25oC
0.1
0.01
0.1
0.01
Ta=-40oC
1
10
100
1
10
100
Output Power (mW)
Output Power (mW)
THD+N vs. Output Power
THD+N vs. Output Power
(V+=2.8V,f=1KHz,RL=16Ω)
(V+=2.8V,f=1KHz,RL=32Ω)
10
1
10
1
Ta=85oC
Ta=85oC
Ta=-40oC
Ta=25oC
Ta=-40oC
0.1
0.01
0.1
0.01
Ta=25oC
1
10
100
1
10
100
Output Power (mW)
Output Power (mW)
Mute Level vs. Frequency
Output Noise Voltage vs. Ambient Temperature
(V+=5V,Vin=-6dBV,RL=32Ω)
(RL=32Ω,A-Weigthed)
-90
-50
-60
-70
-80
-90
-100
V+=5V
-95
Ta=-40oC
V+=2.8V
-100
-105
-110
Ta=25oC
Ta=85oC
-40 -20
0
20 40 60 80 100 120
10
100
1K
10K
o
Frequency (Hz)
Ambient Temperature ( C)
- 6 -
NJM2769B
Channel Separation vs. Frequency
Ripple Rejection Ratio vs. Frequency
(Vripple=-20dBV,RL=32Ω)
(V+=5V,f=1KHz,RL=32Ω)
120
110
100
90
100
80
60
40
20
0
V+=5V
80
V+=2.8V
70
60
50
40
0.01
0.1
1
10
10
100
1K
10K
Frequency (Hz)
Frequency (Hz)
Voltage Gain vs Mute Control Voltage
(V+=5V,f=1KHz,Vin=-6dBV)
20
0
Ta=85oC
-20
-40
-60
-80
Ta=25oC
Ta=-40oC
-100
0
0.5
1
1.5
MUTE Covtrol Voltage (V)
[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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