NJRC NJM2769BM

NJM2769B
HEADPHONE AMPLIFIER for CD-ROM
GENERAL DESCRIPTION
PACKAGE OUTLINE
The NJM2769B is a headphone amplifier designed for CDROM.
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.
NJM2769BM
NJM2769BRB1
FEATURES
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
1
8
2
7
3
6
4
5
PIN FUNCTION
1.OUT1
2.MUTE
3.IN1
4.GND
5.IN2
6.BIAS
7.OUT2
+
8.V
BLOCK DIAGRAM
8
7
6
5
BIAS
MUTE
1
2
3
4
-1-
NJM2769B
ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
SYMBOL
+
Supply Voltage
V
Power Dissipation
PD
RATINGS
Operating Temperature Range
Topr
+7
(DMP8) 375
(TVSP8)320
-40 to +85
Storage Temperature Range
Tstg
-50 to +150
UNIT
V
mW
°C
°C
ELECTRICAL CHARACTERISTICS (V+=5.0V,Vin=-6dBV,f=1kHz,RL=32Ω,Ta=25°C unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
+
MIN.
TYP.
MAX.
UNIT
2.8
5.0
5.5
V
Operating Voltage
V
Operating Current
ICC
No Signal
-
2.0
4.0
mA
Reference Voltage
Vref
No Signal
-
2.1
-
V
Closed Loop Gain
GV
5
6
7
dB
Channel Balance
∆GV
-0.5
0
+0.5
dB
Output Power
PO1
RL=32Ω, THD=0.1%
30
50
-
mW
PO2
RL=16Ω, THD=0.1%
40
100
-
mW
-
0.02
0.1
%
Total Harmonic Distortion
THD
Output Noise Voltage
Vno
Rg=0Ω, A-Weighted
-
-98
(12.6)
Mute Attenuation
ATT
Vo/Vin
-
-80
-70
dB
Channel Separation
CS
65
80
-
dB
Ripple Rejection Ratio
RR
-
65
-
dB
Input Voltage H-level
VIH
2.0
-
V
+
V
Input Voltage L-level
VIL
0.0
-
0.3
V
Vripple=-20dBV, Rg=0Ω
dBV
-88
(39.8) (µVrms)
CONTROL PIN INFORMATION
PARAMETER
CONTROL SIGNAL
OPERATING CONDITION
MUTE ON
L
NON-SIGNAL
MUTE OFF
H
OUTPUT SIGNAL
-2-
NJM2769B
„ TERMINAL DESCRIPTION
PIN
NO.
SYMBOL
FUNCTION
1
7
OUT1
OUT2
OUTPUT1
OUTPUT2
EQUIVALENT CIRCUIT
TERMINAL
VOLTAGE
+
(V -1VBE)/2
10uA
2
MUTE
MUTE CONTROL
350k
50k
3
5
IN1
IN2
INPUT1
INPUT2
+
(V -1VBE)/2
50k
BIAS
50k
6
BIAS
REFERENCE VOLTAGE
STABILIIZED CAPACITOR
CONNECT TERMINAL
+
(V -1VBE)/2
50k
-3-
NJM2769B
„ TYPICAL APPLICATION
100μF
47μF
BIAS
OUT2
+
V
8
IN2
5
6
7
16Ω/32Ω
SPEAKER
+
V
BIAS
2
100μF
1
16Ω/32Ω
SPEAKER
mute
1
2
OUT1
MUTE
MUTE
H: SPEAKER Active
4
3
IN1
GND
1 F
100kΩ
1μF
L: SPEAKER Mute
-4-
NJM2769B
„ TYPICAL CHARACTERISTICS
Oprating Current vs. Operating Voltage
Operating Current vs. Ambient Temperature
4
3.5
3.5
Operating Current (mA)
Operating Current (mA)
(MUTE=V+)
4
3
2.5
2
1.5
1
0.5
3
V+=5V
2.5
2
V+=2.8V
1.5
1
0.5
0
0
0
1
2
3
4
5
-40 -20
6
Reference Voltage vs. Operating Voltage
80 100 120
Reference Voltage vs. Ambient Temperature
3
3
2.5
2.5
Reference Voltage (V)
Reference Voltage (V)
20 40 60
Ambient Temperature (oC)
Operating Voltage (V)
2
1.5
1
0.5
V+=5V
2
1.5
V+=2.8V
1
0.5
0
0
0
1
2
3
4
5
-40 -20
6
0
20 40 60
80 100 120
o
Operating Voltage (V)
Ambient Temperature ( C)
Power Dissipation vs.Output Power
Power Dissipation vs.Output Power
(V+=5V,f=1KHz)
(V+=2.8V,f=1KHz)
400
120
350
Power Dissipation (mW)
Power Dissipation (mW)
0
RL=16Ω
300
250
200
RL=32Ω
150
100
THD=10%
50
0
RL=16Ω
100
80
60
40
RL=32Ω
THD=10%
20
0
0
20
40
60
80
100
Output Power (mW)
120
0
5
10
15
20
25
Output Power (mW)
-5-
NJM2769B
THD+N vs. Output Power
THD+N vs. Output Power
(V+=5V,f=1KHz,RL=16Ω)
10
10
1
1
THD+N (%)
THD+N (%)
(V+=5V,f=1KHz,RL=32Ω)
o
Ta=85 C
Ta=25 oC
0.1
Ta=85 oC
Ta=25 C
Ta=-40 oC
o
0.1
o
Ta=-40 C
0.01
0.01
1
10
100
1
Output Power (mW)
THD+N vs. Output Power
THD+N vs. Output Power
10
10
1
1
Ta=85 oC
o
Ta=-40 C
THD+N (%)
THD+N (%)
100
(V+=2.8V,f=1KHz,RL=16Ω)
(V+=2.8V,f=1KHz,RL=32Ω)
0.1
Ta=85 oC
Ta=-40 oC
0.1
Ta=25 oC
Ta=25 oC
0.01
0.01
1
10
100
1
Output Power (mW)
10
100
Output Power (mW)
Mute Level vs. Frequency
Output Noise Voltage vs. Ambient Temperature
(RL=32Ω,A-Weigthed)
(V+=5V,Vin=-6dBV,RL=32Ω)
-50
-90
-60
V+ =5V
-95
V+=2.8V
-100
-105
Mute Level (dB)
Output Noise Voltage (dBV)
10
Output Power (mW)
-70
o
Ta=-40 C
-80
-90
Ta=25 oC
Ta=85 oC
-110
-40 -20
0
20 40 60
80 100 120
o
Ambient Temperature ( C)
-100
10
100
1K
10K
Frequency (Hz)
-6-
NJM2769B
Channel Separation vs. Frequency
Ripple Rejection Ratio vs. Frequency
(V+=5V,f=1KHz,RL=32Ω)
(Vripple=-20dBV,RL=32Ω)
100
110
Ripple Rejection Ratio (dB)
Channel Separation (dB)
120
100
90
80
70
60
50
40
10
100
1K
80
V+=5V
60
V+=2.8V
40
20
0
0.01
10K
Frequency (Hz)
0.1
1
10
Frequency (Hz)
Voltage Gain vs Mute Control Voltage
(V+=5V,f=1KHz,Vin=-6dBV)
20
Voltage Gain (dB)
0
Ta=85 oC
-20
-40
Ta=25oC
-60
Ta=-40 oC
-80
-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.
-7-