NJRC NJM2777V

NJM2777
Headphone Amplifier with Electronic Volume
■ PACKAGE OUTLINE
■ GENERAL DESCRIPTION
NJM2777 is a headphone amplifier with electronic volume. It
includes widely gain adjustable volume, +20 to –80 dB, and mute
function. These are controlled by DC voltage. The NJM2777 is
suitable for headphone output on TV set.
NJM2777D
■ FEATURES
● Operating Voltage
● Electronic Volume
● Mute Function
● Bipolar
● Package Outline
NJM2777M
NJM2777V
8 to 10 V
+20dB to -80dB
DIP14, DMP14, SSOP14
■ BLOCK DIAGRAM
CNTa CAPa
Mute
Mute
IN a
VOL
OUTa
IN b
VOL
OUTb
Bias
CNTb CAPb
Vref
V+ GND
■ PIN FUNCTION
1
7
14
8
No.
1
SYMBOL
No.
8
SYMBOL
2
OUTb
Bch Output
9
Vref
Reference voltage stabilized
capacitor connect terminal
3
CNTb
Bch Volume control voltage
input
10
INa
Ach Input
4
CAPb
11
CAPa
5
INb
Bch Volume control click
noise absorbing capacitor
connect terminal
Bch Input
12
CNTa
6
Mute
Mute control
13
OUTa
Ach Output
7
N.C.
No connecting
14
GND
Ground
V+
FUNCTION
Power Supply
N.C.
FUNCTION
No connecting
Ach Volume control click
noise absorbing capacitor
connect terminal
Ach Volume control voltage
input
–1–
NJM2777
■ ABSOLUTE MAXIMUM RATING (Ta=25°°C)
PARAMETER
SYMBOL
+
Supply Voltage
V
Power Dissipation
PD
RATING
UNIT
V
mW
°C
Operating Temperature Range
Topr
12
DIP14 : 500
DMP14 : 500*
SSOP14 : 440*
-20 to +75
Storage Temperature Range
Tstg
-40 to +125
■ ELECTRICAL CHARACTERISTICS
°C
*(Note) EIA/JEDEC STANDARD Test board(76.2 x 114.3 x 1.6mm, 2layers, FR-4)mounting
+
(V =9V, VIN=-20dBV, f=1kHz, RL=100Ω, Gv=0dB,”Mute” terminal =L, Ta=25°C)
●POWER SUPPLY
PARAMETER
SYMBOL
TEST CONDITION
+
Operating Voltage
V
Operating Current
ICC
Reference Voltage
VREF
No Signal
MIN.
TYP.
MAX.
UNIT
8
9
10
V
-
5
8
mA
4
4.1
4.2
V
MIN.
TYP.
MAX.
UNIT
80
100
-
dB
-1.5
8.9
(2.8)
70
0
9.5
(3.0)
100
1.5
-
dB
dBV
(Vrms)
mW
-
0.1
1
%
●AMPLIFIER
PARAMETER
SYMBOL
Volume Operating Range
GEVR
Voltage Gain Channel Balance
∆Gv
Maximum Input Voltage
VIM
Output Power
PO
TEST CONDITION
VCNTa, VCNTb = 0 to 3.3V
Gv=-10dB
THD=3%
Gv=10dB, THD=10%
THD
Total Harmonic Distortion
Channel Separation
CS
Rg=600Ω, Vin = 0dBV
Mute Level
Mute
“Mute” terminal=H,
Vin = 0dBV
Output Noise Voltage 1
VNO1
Rg=0Ω, A-Weighted
Output Noise Voltage 2
VNO2
Power Supply Ripple Rejection
PSRR
“Mute” terminal =H
Rg=0Ω, A-Weighted
Vripple=-20dBV
Rg=0Ω
-
70
80
-
dB
-
-85
-75
dB
-
-95
(18)
-105
(5.6)
-85
(56)
-95
(18)
-
70
-
dB
MIN.
TYP.
MAX.
UNIT
-
dBV
(µVrms)
dBV
(µVrms)
●CONTROL
PARAMETER
SYMBOL
TEST CONDITION
+
V
V
High Level Input Voltage
VIH
2
-
V
Low Level Input Voltage
VIL
0
-
0.4
■ CONTROL TERMINAL
Control Terminal
Mute Terminal
Description
Mute
H
Mute the signal
Active
L, OPEN
Output the signal
Operating Condition
Operating
Condition
–2–
NJM2777
■ TEST CIRCUIT
TEST CIRCUIT1 (THD, GEVR, VIM, PO)
Input B
CNT B
Output B
100Ω
0.47µF
100µF
1µF
7
6
5
N.C.
Mute
INb
V+
VCNTB
4
3
2
CAPb CNTb OUTb
10µF
1
[THD] BPF:400 to 30KHz
[GEVR] BPF:1KHz
V+
VOL
VOL
Bias
N.C.
Vref
INa
8
9
10
CAPa CNTa OUTa GND
11
12
10µF
13
14
100µF
0.47µF
Output A
1µF
VCNTA
100Ω
Input A
CNT A
Volume Range : GEVR= 20 log
[THD] BPF:400 to 30KHz
[GEVR] BPF:1KHz
Vo max
Vo min
Vomin : Output voltage at VCNT=0V
Vomax : Output voltage at VCNT=3.3V
–3–
NJM2777
TEST CIRCUIT 2 (VNO1,VNO2,VREF)
Input B
CNT B
Output B
100Ω
VCNTB
0.47µF
1µF
7
6
5
N.C.
Mute
INb
[VNO1, VNO2]
A-Weighted
100µF
V+
4
3
2
CAPb CNTb OUTb
1
10µF
V+
VOL
VOL
Bias
N.C.
Vref
INa
8
9
10
CAPa CNTa OUTa GND
11
12
13
14
100µF
10µF
0.47µF
[VREF]
Output A
1µF
VCNTA
100Ω
Input A
–4–
CNT A
[VNO, VNO2]
A-Weighted
NJM2777
TEST CIRCUIT 3 (Icc)
Input B
CNT B
Rg=600Ω
Output B
100Ω
VCNTB
V+
100µF
1µF
[Icc]
0.47µF
7
6
5
N.C.
Mute
INb
4
3
2
CAPb CNTb OUTb
1
10µF
V+
VOL
VOL
Bias
N.C.
Vref
INa
8
9
10
CAPa CNTa OUTa GND
11
0.47µF
10µF
12
13
100µF
VCNTA
Rg=600Ω
14
Output A
1µF
100Ω
Input A
CNT A
–5–
NJM2777
TEST CIRCUIT 4 (CS)
Input B
CNT B
Rg=600Ω
100Ω
VCNTB
[CS]
BPF:1KHz
100µF
1µF
0.47µF
7
6
5
4
N.C.
Mute
INb
3
2
CAPb CNTb OUTb
1
10µF
V+
VOL
Rg=600Ω
VOL
Bias
N.C.
Vref
INa
8
9
10
CAPa CNTa OUTa GND
11
0.47µF
12
13
14
100µF
10µF
Output A
1µF
Rg=600Ω
–6–
Input A
VCNTA
CNT A
[CS]
BPF:1KHz
100Ω
NJM2777
TEST CIRCUIT 5 (PSRR)
Input B
CNT B
Output B
100Ω
Rg=0Ω
VCNTB
[PSRR]
BPF:1KHz
100µF
1µF
0.47µF
7
6
5
N.C.
Mute
INb
4
3
2
CAPb CNTb OUTb
1
10µF
V+
V+
VOL
VOL
Bias
N.C.
Vref
INa
8
9
10
CAPa CNTa OUTa GND
11
0.47µF
12
13
14
100µF
10µF
Output A
Rg=0Ω
1µF
VCNTA
100Ω
Input A
[PSRR]
BPF:1KHz
CNT A
–7–
NJM2777
TEST CIRCUIT 6 (MUTE)
CNT B
Input B
Output B
100Ω
VCNTB
0.47µF
100µF
V+
1µF
7
6
5
N.C.
Mute
INb
4
3
2
CAPb CNTb OUTb
1
[MUTE]
BPF:1KHz
10µF
V+
VOL
VOL
Bias
N.C.
Vref
INa
8
9
10
CAPa CNTa OUTa GND
11
12
13
14
10µF
0.47µF
100µF
Output A
[MUTE]
BPF:1KHz
1µF
100Ω
Input A
–8–
CNT A
NJM2777
■ APPLICATION CIRCUIT
Input B
Output B
CNT B
1µF
1µF
0.47µF
100kΩ
7
6
5
N.C.
Mute
INb
100µF
4
3
2
CAPb CNTb OUTb
75Ω
1
10µF
V+
VOL
VOL
Bias
N.C.
Vref
INa
8
9
10
CAPa CNTa OUTa GND
11
0.47µF
12
13
14
100µF
10µF
Output A
1µF
CNT A
75Ω
Input A
–9–
NJM2777
■ TERMINAL DESCRIPTION
PIN
NO.
SYMBOL
2
13
OUTb
OUTa
FUNCTION
EQUIVALENT CIRCUIT
Bch Output
Ach Output
18k
TERMINAL
VOLTAGE
2.2
1k
OUT
200
V+/2
25p
3
12
CNTb
CNTa
Bch Volume Control
Ach Volume Control
CAP
CNT
200
42k
42k
4
CAPb
11
CAPa
-
Bch Volume control click
noise absorbing capacitor
connect terminal
Ach Volume control click
noise absorbing capacitor
connect terminal
CAP
CNT
200
42k
42k
5
10
INb
INa
Bch Input
Ach Input
IN
200
GND
50k
– 10 –
NJM2777
■ TERMINAL DESCRIPTION
PIN
NO.
SYMBOL
6
Mute
FUNCTION
EQUIVALENT CIRCUIT
TERMINAL
VOLTAGE
Mute Control
Mute
200
GND
400k
9
Vref
Reference voltage stabilized
capacitor connect terminal
100k
Vref
V+/2
200
100k
– 11 –
NJM2777
■ TYPICAL CHARACTERISTICS
Operating Current vs. Ambient Temperature
Operating Current vs. Operating Voltage
V+=9V, No signal, MUTE=L
No signal, MUTE=L, Ta=25°C
8
7
7
6
6
Operating Current [mA]
Operating Current [mA]
8
5
4
3
5
4
3
2
2
1
1
0
0
4
6
8
10
12
14
-50
50
100
150
Ambient Temperature [°C]
Reference Voltage vs. Operating Voltage
Reference Voltage vs. Ambient Temperature
No signal, MUTE=L, Ta=25°C
V+=9V, No signal, MUTE=L
7
7
6
6
Reference Voltage [V]
Reference Voltage [V]
0
Operating Voltage [V]
5
4
5
4
3
3
2
2
4
6
8
10
12
-50
14
0
50
100
150
Ambient Temperature [°C]
Operating Voltage [V]
Voltage Gain vs. Control Voltage (Frequency)
Voltage Gain vs. Control Voltage (Operating Voltage)
V+=9V, Vin=-20dBV, RL=100Ω, Ta=25°C
40
40
20
20
0
0
-20
-40
V+=8V, 9V, 10V
-20
-40
f=100Hz, 1kHz, 10kHz
-60
-60
-80
-80
-100
0.0
0.5
1.0
1.5
2.0
VCNT [V]
– 12 –
Voltage Gain[dB]
Voltaqge Gain [dB]
Vin=-20dBV, f=1kHz, RL=100Ω, Ta=25°C
2.5
3.0
-100
0.0
0.5
1.0
1.5
2.0
VCNT [V]
2.5
3.0
NJM2777
■ TYPICAL CHARACTERISTICS
Voltage Gain vs. Control Voltage (Ambient Temperature)
Mute Level vs. Mute Control Voltage
V+=9V, Vin=-20dBV, f=1kHz, RL=100Ω
40
V+=9V, Vin=0dBV, f=1kHz, Gv=0dB, RL=100Ω
20
-20°C
25°C
20
0
75°C
Mute Level [dB]
-20
-40
-20
Ta=-20°C
Ta=25°C
-40
T a=75°C
-60
-60
-80
-80
-100
0.0
0.5
1.0
1.5
2.0
2.5
-100
0.0
3.0
1.0
2.0
VCNT [V]
Mute Level vs. Frequency
4.0
Mute Level vs. AMbient Temperature
V+=9V, Vin=0dBV, f=1kHz, Gv=0dB, RL=100Ω, MUTE=H
0
0
-10
-10
-20
-20
-30
-30
-40
Mute Level [dB]
Mute Level [dB]
3.0
Mute Control Voltage [V]
V+=9V, Vin=0dBV, Gv=0dB, RL=100Ω, MUTE=H, Ta=25°C
-50
-60
-70
-40
-50
-60
-70
-80
-80
-90
-90
-100
-100
-110
-50
-110
10
100
1000
10000
100000
0
50
100
150
Ambient Temperature [°C]
Frequency [Hz]
Voltage Gain Channel Balance vs. Control Voltage (Ambient Temperature)
V+=9V, Vin=-20dBV, f=1kHz, RL=100Ω
Voltage Gain Channel Balance vs. Control Voltage (Frequency)
V+=9V, Vin=-20dBV, RL=100Ω, Ta=25°C
1.5
1.5
1
1
Voltage Gain Channel Balance [dB]
Voltage Gain Channel Balance [dB]
Voltage Gain [dB]
0
f=10kHz
0.5
0
-0.5
-1
-1.5
0.0
f=1kHz
100Hz
-20°C
0.5
0
-0.5
25°C
75°C
-1
-1.5
0.5
1.0
1.5
2.0
VCNT [V]
2.5
3.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
VCNT [V]
– 13 –
NJM2777
■ TYPICAL CHARACTERISTICS
THD+N vs. Output Power (Operating Voltage)
THD+N vs. Output Power (Frequency)
f=1kHz, Gv=10dB, RL=100Ω, BW=400Hz-30kHz, Ta=25°C
V+=9V, Gv=10dB, RL=100Ω, Ta=25°C
100
100
f=100Hz: BW=22Hz-30kHz
f=1kHz : BW=400Hz-30kHz
f=10kHz: BW=400Hz-80kHz
V+=10V
V+=9V
10
10
f=10kHz
THD+N [%]
THD+N [%]
V+=8V
1
0.1
1
0.1
f=100Hz,
f=1kHz
0.01
1E-6
10E-6
100E-6
1E-3
10E-3
100E-3
0.01
1E-6
1E+0
10E-6
100E-6
Output Power [W]
1E-3
10E-3
100E-3
1E+0
Output Power [W]
THD+N vs. Output Power (Ambient Temperature)
Power Dissipation vs. Output Power
V+=9V, f=1kHz, Gv=10dB, RL=100Ω, BW=400Hz-30kHz
f=1kHz, Gv=10dB, RL=100Ω, BW=400Hz-30kHz, Ta=25°C, 2ch Input
100
180
160
140
Power Dissipation [mW]
THD+N [%]
10
Ta=25°C
Ta=-20°C
1
0.1
120
THD=10%
100
V+=10V
THD=10
%
80
V+=9V
60
THD=10
%
V+=8V
40
Ta=75°C
20
0.01
1E-6
0
10E-6
100E-6
1E-3
10E-3
100E-3
1E+0
0
20
40
Output Power [W]
60
80
100
120
140
Output Power [mW/ch]
Output Power vs. Operating Voltage
Output Noise Voltatge 1 vs. Ambient Temperature
f=1kHz, THD=10%, Gv=10dB, RL=100Ω, BW=400Hz-30kHz
V+=9V, Gv=0dB, RL=100Ω, Rg=0Ω, A-Weighted, MUTE=L
200
-80
180
Ta=75°C
-85
160
Output Noise Voltatge 1 [dBV]
Ta=25°C
Output Power [mW]
140
Ta=-20°
120
100
80
60
40
-95
-100
-105
-110
-115
20
0
6
7
8
9
10
Operating Voltage [V]
– 14 –
-90
11
12
13
-120
-50
0
50
100
Ambient Temperature[°C]
150
NJM2777
■ TYPICAL CHARACTERISTICS
Output Noise Voltatge 2 vs. Ambient Temperature
V+=9V, RL=100Ω, Rg=0Ω, A-Weighted, MUTE=H
-80
Output Noise Voltatge 2 [dBV]
-85
-90
-95
-100
-105
-110
-115
-120
-50
0
50
100
150
Ambient Temperature[°C]
[CAUTION]
The specifications on this data book are only
given for information, without any guarantee
as regards either mistakes or omissions. The
application circuits in this data book 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.
– 15 –