NJM2122
ULTRA LOW NOISE DUAL OPERATIONAL AMPLIFIER
■
GENERAL DESCRIPTION
The NJM2122 is an ultra low noise dual operational amplifier.
The features of ultra low noise, low operating voltage, and low
saturation voltage are suitable for microphone amplifier of digital
audio items such as portable MD,DAT,and others.
■
FEATURES
●
Operating Voltage
●
Ultra Low Noise Voltage
●
Low Saturation Output Voltage
●
Bipolar Technology
●
Package Outline
■
PIN CONFIGURATION
PIN FUNCTION
1.A OUTPUT
2.A –INPUT
3.A +INPUT
4.V
-
■
PACKAGE OUTLINE
( ±2.0V~±7.0V )
( 1.5nV/√Hz typ.@ f=1kHz )
( 0.3V typ. )
DIP8,DMP8
NJM2122D
NJM2122M
5.B +INPUT
6.B –INPUT
7.B OUTPUT
8.V
NJM2122D
NJM2122M
+
■
EQUIVALENT CIRCUIT
( 1/2 Shown )
Ver.2016-04-27
-1-
NJM2122
■
ABSOLUTE MAXIMUM RATINGS
( Ta=25˚C )
PARAMETER
Supply Voltage
Differential Input Voltage
Input Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
SYMBOL
+ -
V /V
V
ID
V
IC
P
D
T
opr
T
stg
RATINGS
± 10
± 0.5
± 10 ( note )
( DIP8 ) 500
( DMP8 ) 300
-20~+75
-40~+125
UNIT
V
V
V
mW
˚C
˚C
( note ) When the supply voltage is less than ±10V,the absolute maximum input voltage is equal to the supply voltage.
■
ELECTRICAL CHARACTERISTICS
PARAMETER
Operating Voltage 1
Operating Voltage 2
Operating Current
Input Offset Voltage
Input Offset Current
Input Bias Current
Large Signal Voltage Gain
Input Common Mode Voltage Range
Common Mode Rejection Ratio
Supply Voltage Rejection Ratio
Maximum Output Voltage
Slew Rate
Gain Bandwidth Product
Equivalent Input Noise Voltage 1
Equivalent Input Noise Voltage 2
Channel Separation
Total Harmonic Distortion
SYMBOL
Vope1
Vope2
I
CC
V
IO
I
IO
I
B
A
V
V
ICM
CMR
SVR
V
OM
SR
GB
e
n1
e
n2
CS
THD
TEST CONDITION
DIP Package
DMP Package
V
IN
=0V,R
L
=∞Ω
R
S
=500Ω
R
L
≥10kΩ
MIN.
± 2.0
± 2.0
-
-
-
-
80
± 0.7
60
60
± 2.0
-
-
-
-
-
-
TYP.
-
-
7.0
1.0
0.45
3.6
100
± 1.0
74
80
± 2.2
2.4
12
1.5
0.56
90
0.003
( V
+
=5V
,
Ta=25˚C )
MAX.
± 10.0
± 7.0
9.5
6.0
1.50
8.0
-
-
-
-
-
-
-
-
0.75
-
-
UNIT
V
V
mA
mV
μA
μA
dB
V
dB
dB
V
V/μs
MHz
nV√Hz
μVrms
dB
%
R
L
≥2.5kΩ
G
V
=20dB,V
IN
=± 0.1V
R
S
=10Ω,f=1kHz
*Figure1
f=1kHz
V
O
=1Vrms,f=1kHz
G
V
=20dB,R
L
=2.5kΩ
( note ) Between 30 to 50dB voltage gain is recommended.
In case of voltage gain less than 30dB,phase compensation by external circuit is required.
The voltage follower circuit must not be used.
DMP package should be used in operating voltage less than ±7V,because of the P
D
limitation.
Figure1
-2-
Ver.2016-04-27
NJM2122
■
TYPICAL CHARACTERISTICS
Operating Current vs. Operating Voltage
14
Ta=25ºC
Maximum Output Voltage vs. Operating Voltage
15
Ta=25ºC
Operating Current Icc [mA]
12
10
8
6
4
2
0
0
±2
±4
±6
±8
±10 ±12
Operating Voltage V
+
/V
-
[V]
±14
Maximum Output Voltage V
OM
[V]
10
5
0
-5
-10
-15
0
±2
R
L
=10kΩ
R
L
=2.5kΩ
R
L
=10kΩ
R
L
=2.5kΩ
±4
±6
±8
±10 ±12
Operating Voltage V
+
/V
-
[V]
±14
Input Offset Voltage vs. Operating Voltage
6
Ta=25ºC
Input Bias Current vs. Operating Voltage
10
9
Ta=25ºC
Input Offset Voltage V
IO
[mV]
Input Bias Current I
B
[μA]
0
±2
±4
±6
±8
±10 ±12
+
/V
-
[V]
Operating Voltage V
±14
4
2
0
-2
-4
-6
8
7
6
5
4
3
2
1
0
0
±2
±4
±6
±8
±10 ±12
+
/V
-
[V]
Operating Voltage V
±14
Input Offset Voltage vs. Temperature
6
V
+
/V
-
=±2.5V
Input Bias Current vs. Temperature
10
9
V
+
/V
-
=±2.5V
Input Offset Voltage V
IO
[mV]
Input Bias Current I
B
[μA]
-40
-20
0
20 40 60 80 100 120
Ambient Temperature Ta [ºC]
4
2
0
-2
-4
-6
8
7
6
5
4
3
2
1
0
-40
-20
0
20 40 60 80 100 120
Ambient Temperature Ta [ºC]
Ver.2016-04-27
-3-
NJM2122
■
TYPICAL CHARACTERISTICS
Operating Current vs. Temperature
14
V
+
/V
-
=±2.5V
Maximum Output Voltage vs. Temperature
3
V
+
/V
-
=±2.5V, OPEN LOOP, R
L
=2.5kΩ
Operating Current Icc [mA]
12
10
8
6
4
2
0
-40
-20
0
20 40 60 80 100 120
Ambient Temperature Ta [ºC]
Maximum Output Voltage V
OM
[V]
2
1
0
-1
-2
-3
-50
-25
0
25
50
75
100
Ambient Temperature Ta [ºC]
125
Maximum Output Voltage vs. Frequency
5.0
V
+
/V
-
=±2.5V, R
L
=2.5kΩ, Ta=25ºC
Maximum Output Voltage
vs. Load Resistance
3
V
+
/V
-
=±2.5V, Ta=25ºC
Maximum Output Voltage V
OPP
[V]
Maximum Output Voltage V
OM
[V]
10
100
1k
10k
Frequency f [Hz]
100k
1M
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2
1
0
-1
-2
-3
10
100
1k
10k
Load Resistance R
L
[Ω]
100k
Equivalent Input Noise Voltage
vs. Source Resistance
Equivalent Input Noise Voltage V
NI
[μVrms]
10
V
+
/V
-
=±2.5V, R
L
=2.5kΩ, Ta=25ºC
Output Voltage vs. Source Resistance
3
2
V
+
/V
-
=±2.5V, R
L
=2.5kΩ, Ta=25ºC
Flat
Output Voltage V
O
[V]
10k
1
0
-1
-2
1
DIN-Audio
JIS-A
0.1
10
100
1k
Source Resistance R
S
[Ω]
-3
10
100
1k
Source Resistance R
S
[Ω]
10k
-4-
Ver.2016-04-27
NJM2122
■
TYPICAL CHARACTERISTICS
Maximum Output Voltage vs. Output Current
3
V
+
/V
-
=±2.5V, Ta=25ºC
THD vs. Output Voltage
0.1
V
+
/V
-
=±2.5V, BL=
Ω, 20dB Non-Inv.
Amp, Ta=25ºC
Total Harmonic Distortion THD [%]
Maximum Output Voltage V
OM
[V]
f=20kHz
2
1
0
-1
-2
-3
1μ
1.E-06
0.01
f=20Hz
0.001
f=1Hz
10μ
100μ
1m
1.E-05
1.E-04
1.E-03
Output Current I
O
[A]
10m
1.E-02
0.0001
0.01
0.1
1
Output Voltage V
O
[Vrms]
10
Equivalent Input Noise Voltage
vs. Frequency
Equivalent Input Noise Voltage [nV/√Hz]
100
V
+
/V
-
=±2.5V, R
S
=10Ω, A
V
=60dB, Ta=25ºC
10
1
0.1
1
10
100
Frequency f [Hz]
1k
[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.
Ver.2016-04-27
-5-
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