NJM2172
OPERATIONAL AMPLIFIER WITH EVR
s
GENERAL DESCRIPTION
The NJM2172 is single supply, dual OP-AMP with
electric variable resistor (EVR), which contains buffer
amplifier, OP-AMP, reference voltage circuit, EVR and EVR
control circuit.
+
The reference is fixed around 1/2 V level internally, and
only required few external parts.
The A and B EVR is control separately, and amp drive
up to 100Ω(typ.) load. The NJM2172 is suitable for
camcorder, CD, MD, and other audio signal process
system.
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FEATURES
q
Low Power Supply Voltage
q
Low Operating Current
q
A/Bch EVR adjust is separately
q
EVR range
q
Drivability
q
Bipolar Technology
q
Package Outline
s
BLOCK DIAGRAM
s
PACKAGE OUTLINE
NJM2172V
V
+
= 2.7 to 5.5V
Icc = 5.0mA typ.
-3.0 to -95½B
100
Ω
typ.
SSOP14
s
PIN CONFIGURATION
1: OP
+IN
A
2: OP
-IN
A
3: OP
OUT
A
4: EVR
OUT
A
5: V
CNT
A
6: V
CNT
B
+
7: V
8: GND
9: Vref
10:REF
IN
11:EVR
OUT
B
12:OP
OUT
B
13:OP
-IN
B
14:OP
+IN
B
14
13
12
Bch
VCA
11
10
9
8
Bch OPAMP
Bch EVR
Ach EVR
Ach OPAMP
Ach
VCA
Bch EVR AMP VREF AMP
Bch EVR Control
Ach EVR Control
Ach EVR AMP
1
2
3
4
5
6
7
-1-
NJM2172
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ABSOLUTE MAXIMUM RATING
PARAMETER
RATINGS
Supply Voltage
Storage Temperature Range
Operating Temperature Range
Power Dissipation
(Ta=25
°C
)
SYMBOL(UNIT)
OTHERS
+7.0
-50 to +150
-40 to +85
300
V
DD
(V)
Tstg (
°C
)
Topr (
°C
)
P
D
(mW)
SSOP14（ONLY）
s
ERECTRICAL CHARACTERISTICS (
V
＋
=3.5V, Crefin=10pF,Cref=1µＦ, f=1kHz, Ta=25°C unless otherwise noted)
q
SUPPLY
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
TEST
CIRCUIT
Operating Current
Reference Voltage
I
CC
Vref
RL=∞
RL=∞
-
1.45
5.0
1.55
7.5
1.65
mA
V
1
1
q
OP-AMP SECTION
PARAMETER
Input Offset Voltage
Input Bias Current
Voltage Gain 1
Maximum Output
Voltage Swing 1
Input Common Mode
Voltage Range
Output Noise Voltage
Common Mode
Rejection Ratio
Supply Voltage
Rejection Ratio
Gain Bandwidth
Product
SYMBOL
V
IO
I
IB
G
V1
V
OM1
V
ICM
V
ON1
CMR
SVR
GB
TEST CONDITION
R
S
≤10kΩ
MIN.
-
-
TYP.
1.0
100
80
0
( 1.0 )
-
-100
( 10.0 )
74
80
2
MAX.
6.0
300
-
-
(-)
-
-90
UNIT
mV
nA
dB
dBV
(Vrms)
TEST
CIRCUIT
3
3
3
2
-
1
3
3
-
R
L
≤10kΩ
THD=1%, RL≥2.5kΩ
-
Rs=600Ω / A-Weighted
R
S
≤10kΩ
R
S
≤10kΩ
60
-3.0
( 0.7 )
0.55 to 2.55
V
dBV
-
60
60
-
( 30.0 )
(µVrms)
-
-
-
dB
dB
MHz
-2-
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