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. s 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 -95dB 100Ω typ. SSOP14
s PIN CONFIGURATION 1: OP+INA 2: OP-INA 3: OPOUTA 4: EVROUTA 5: VCNTA 6: VCNTB + 7: V 8: GND 9: Vref 10:REFIN 11:EVROUTB 12:OPOUTB 13:OP-INB 14:OP+INB
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
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NJM2172
s 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
VDD (V) Tstg (°C) Topr (°C) PD (mW)
SSOP14(ONLY)
sERECTRICAL 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
ICC 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
VIO IIB GV1 VOM1 VICM VON1 CMR SVR GB
TEST CONDITION
RS≤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 -
RL≤10kΩ THD=1%, RL≥2.5kΩ Rs=600Ω / A-Weighted RS≤10kΩ RS≤10kΩ
60 -3.0 ( 0.7 )
0.55 to 2.55
V dBV
60 60 -
( 30.0 ) (µVrms) dB dB MHz
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NJM2172
q EVR SECTION PARAMETER Voltage Gain 2 Total Harmonic Distortion EVR Gain Output Noise Voltage 2 Maximum Output Voltage Swing 2 Channel Separation
(VCNT=2.7V, RL=100Ω unless otherwise noted)
SYMBOL
GV2 THD GEVR VNO2
TEST CONDITION
VIN = -10dBV VIN = -10dBV
VIN=-10dBV/VCNT=2.7Vto GND
MIN.
-6.0 80 -5.0 ( 0.56 ) -
TYP.
-3.0 0.15 90 -95 (18.0) -3.0 ( 0.71 ) -79 ( 110 ) 0.0
MAX.
0.0 1.0 -85 (56.0) -70 ( 320 ) 3.0
UNIT
TEST CIRCUIT
dB % dB dBV
(µVrms)
1 2 1 1 2 1
RS = 600Ω / A - W eighted
VOM2
THD = 1%
dBV
(Vrms)
CS
VIN=-10dBV / A - Weighted VCNT=1.5V,VINA=VINB=-50dBV f=1kHz, A/B ; *1 VCNT=2.0V,VINA=VINB=-50dBV f=1kHz, A/B ; *1
dBV
(µVrms)
A/B1 EVR Deviation A/B2
-3.0
dB
-3.0 0.0 3.0
1
*1: Ach Amp with Bch=0dB
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NJM2172
s TEST CIRCUIT 1
SW3
A-Weight
1µ
10k V VO1 VREF
2.5k SW4 SW1 SW5 a VI1 b 600
1 2 3
VCA
1µ SW2
47µ
A-Weight
VO2 100
4
10µ
1µ
V
V
10 9 8
OPAMP EVR 1 Ach Bch 1 14
EVR Control
EVR AMP
VREF AMP
2 2 13
3 3 12
4 4 11
5 5 6 pin pin 7
5
VCNT
A
ICC V
+
47µ
Fig.1 Test circuit 1 shows only Ach.
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NJM2172
s TEST CIRCUIT 2
1µ 10k 2.5k SW6 1µ 10k 20k SW7
1 2 3
VCA
VO3 V
47µ VO4 100
4
10µ
1µ
V
10 9 8
VI2
OPAMP EVR 1 Ach Bch 1 14
EVR Control
EVR AMP
VREF AMP
2 2 13
3 3 12
4 4 11
5 5 6 pin pin 7
+
5
VCNT
V
47µ
Fig.2 Test circuit 2 shows only Ach.
-5-
NJM2172
s TEST CIRCUIT 3
VCC
50 50 Ec 50k 10k 10k
SW9 1 2 SW8 3
VCA
50k NULL 10k 10k Ek
VF V
10µ
1µ
10
9
8
OPAMP EVR
EVR AMP EVR Control
VREF AMP
1 Ach Bch 1 14
2 2 13
3 3 12
5 5 6 pin pin 5
7 V
+
47µ
Fig.3 Test circuit 3 shows only Ach.
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NJM2172
s PIN INFORMATION Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Pin Name OP+IN A OP-IN A OPOUTA EVROUT A VCNT A VCNT B + V GND VREF REFIN EVROUT B OPOUT B OP-IN B OP+IN B Function Ach OP-AMP + Input Ach OP-AMP - Input Ach OP-AMP Output / EVR Input Ach EVR Output Ach EVR Control Bch EVR Control Power Supply GND Internal Reference Output Internal Reference Input Bch EVR Output Bch OP-AMP Output / EVR Input Bch OP-AMP - Input Bch OP-AMP + Input
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NJM2172
s EQUIVALENT CIRCUIT Term. No. Term. Name Equivalent Circuit
V+
Terminal Voltage
Note
1 2 13 14
OP+INA OP-INA OP-INB OP+INB
2,13
1,14
1.55V
-
V+ 100
3 12
OPOUTA OPOUTB
14k
1.55V
3,12
OPOUTA / OPOUTB Load:
RL≥2.5kΩ
V+
10
4 11
EVROUTA EVROUTB
4,11
1.55V
EVROUTA / EVROUTB Load:
RL≥100Ω
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NJM2172
Term. No.
Term. Name
Equivalent Circuit
V+
Terminal Voltage
Note
5,6
5 6
VCNT A VCNT B
154k 26k
-
Input EVR control voltage
V+
40k
10
9
52k
Terminal Voltage is
9 10
VREF REFIN
-
52 / (52+40)× + (V - VBE) RL≥2KΩ
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NJM2172
s APPLICATION CIRCUIT 1 Voltage follower
10k
1µ VIN
47µ 10µ RL
1 2 3 4 10 9 8
1µ
VCA OPAMP EVR EVR Control EVR AMP VREF AMP
1 Ach Bch 1 14
2 2 13
3 3 12
4 4 11
5 5 6 pin pin 5 7
VCNT
V
+
47µ
Fig.4 Application circuit 1 shows only Ach.
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NJM2172
s APPLICATION CIRCUIT 2 Invert Circuit (Gv=6dB)
10k
1µ VIN
10k
20k
47µ 10µ RL 1µ
1
2
3
VCA
4
10
9
8
OPAMP EVR
EVR Control
EVR AMP
VREF AMP
1 Ach Bch 1 14
2 2 13
3 3 12
4 4 11
5 5 6 pin pin 5 7
VCNT
V
+
47µ
Fig.5 Application circuit 2 shows only Ach.
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NJM2172
s TYPICAL CHARACTERISTICS
Quiescent Current vs. Supply Voltage Ta=25°C 8.0 Internal Reference Voltage vs. Supply Voltage Ta=25°C 3.0
6.0
4.0
VREF [V]
ICC [mA]
2.0
1.0
2.0
0.0 2.5 3.0 3.5 4.0 V+ [V] 4.5 5.0 5.5
0.0 2.5 3.0 3.5 4.0 V+ [V]
Internal Reference Voltage vs. Temperature V+=3.5V 3.0
4.5
5.0
5.5
Quiescent Current vs. Temperature V+=3.5V 8.0
6.0
2.0
ICC [mA]
4.0
VREF [V]
1.0 0.0 -50
2.0
0.0 -50 0 Ta [°C] 50 100
0 Ta [°C]
50
100
Input Offset Voltage vs. Supply Voltage Ta=25°C 3.0 2.0
300
Input Bias Current vs. Supply Voltage Ta=25°C
VIO [mV]
1.0 0.0 -1.0 -2.0 -3.0 2.5 3.0 3.5 4.0 V+ [V] 4.5 5.0 5.5
200
IB [nA]
100 0 2.5 3.0 3.5 4.0 V+ [V] 4.5 5.0 5.5
Input Offset Voltage vs. Temperature V+=3.5V 3.0 2.0 VIO [mV] 1.0 0.0 -1.0 -2.0 -3.0 -50 0 Ta [°C] 50 100
0 -50 200 300
Input Bias Current vs. Temperature V+=3.5V
IB [nA]
100
0 Ta [°C]
50
100
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NJM2172
Voltage Gain 1 vs. Frequency V+=3.5V,Ta=25°C,RL=2.5k Ω 100 80 GV1 [dB] 60 40 20 0 0.001 GV1 [dB]
70 60 50 40 30 20 10 0 -10 -150 -210 10000 Gain -90 Phase -30 Voltage Gain 1 / Phase vs. Frequency V+=3.5V,Ta=25°C,RL=2.5kΩ,40dB Inverted Amp 30
0.01
0.1
1
10
100
1000
10000
0.1
1
10 f [ kHz]
100
1000
f [kHz]
Voltage Gain1 vs. Temperature V+=3.5V 150
Common Mode Rejection Ratio vs. Temperature V+=3.5V 150
GV1 [dB]
50
CMR [dB]
100
100
50
0 -50 0 Ta [°C] 50 100
0 -50 0 Ta [°C]
Total Harmonic Distortion (OPAMP) vs. Output Level (Temperature) V+=3.5V,f=1kHz,BW=400Hz-30kHz
50
100
Supply Voltage Rejection Ratio vs. Temperature V+=3.5V 150 10 1
SVR [dB] THD [%]
100
0.1 0.01 0.001
85°C,25°C
50
-40°C
0 -50 0 Ta [°C] 50 100
-60
-40
-20 Output Level [dBV]
0
20
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φ [° ]
NJM2172
Maximum Output Voltage 1 vs. Supply Voltage RL=2.5k Ω,f=1kHz,THD=1%,Ta=25°C 10.0 10.0 Maximum Output Voltage 1 vs. Load Resistance V+=3.5V,f=1kHz,THD=1%,Ta=25°C
V OM1 [ dBV]
V OM1 [ dBV]
0.0
0.0
-10.0
-10.0
-20.0 2.5 3.5 V+ [V] 4.5 5.5
-20.0 0.1 1 RL [k Ω] 10 100
Voltage Gain 2 vs. EVR Control Voltage V+=3.5V,f=1kHz,Vin=-10dBV,Ta=25°C 20 0 -20 -40 -60 -80 -100 -120 0 0.5 1 1.5 VCNT [V] 2 2.5 3
GV2 [dB] GV2 [dB]
Voltage Gain 2 / Supply Voltage vs. EVR Control Voltage f=1kHz,Vin=-10dBV,Ta=25°C 20 0 -20 -40 -60 -80 -100 -120 0 0.5 1 1.5 VCNT [V] 2 2.5 3
3.5V,5.5V 2.7V
Voltage Gain 2 / Frequency vs. EVR Control Voltage V+=3.5V,Vin=-10dBV,Ta=25°C 20 0 -20
GV2 [dB] GV2 [dB]
Voltage Gain 2 / Temperature vs. EVR Control Voltage V+=3.5V,f=1kHz,Vin=-10dBV 20 0 -20 -40 -60 -80
25°C -40°C 85°C
-40 -60 -80 -100 -120 0 0.5 1 1.5 VCNT [V] 2 2.5 3
1 kHz,100Hz 10kHz
-100 -120 0 0.5
1
1.5 VCNT [V]
2
2.5
3
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NJM2172
Total Harmonic Distortion (EVR) vs. Output Level (Frequency) V+=3.5V,Ta=25°C 10
f=10kHz BW=22Hz-80kHz
Total Harmonic Distortion (EVR) vs. Output Level (Temperature) V+=3.5V,f=1kHz,BW=400Hz-30kHz 10
THD [%]
THD [%]
1
1
-40°C 25°C
0.1
f=100Hz,1kHz BW=22Hz-22kHz
0.1
85°C
0.01 -60 -40 -20 Output Level [dBV] 0 20
0.01 -60 -40 -20 Output Level [dBV] 0 20
Output Noise Voltage 2 vs. EVR Control Voltage V+=3.5V,Ta=25°C,A-Weighted 0 -20
VNO2 [dBV]
0 -20 -40 -60 -80 -100 -120
Output Noise Voltage 2 vs. Temperature V+=3.5V,VCNT=2.7V,A-Weighted
VNO2 [dBV]
-40 -60 -80 -100 -120 0 1 VCNT [V] 2 3
-50
0 Ta [°C]
50
100
Maximum Output Voltage 2 vs. Supply Voltage RL=100Ω,f=1kHz,THD=1%,Ta=25°C 10.0 10.0
Maximum Output Voltage 2 vs. Load Resistance V+=3.5V,f=1kHz,THD=1%,Ta=25°C
V OM2 [dBV]
-10.0
VOM2 [dBV]
2.5 3.5 V+ [V] 4.5 5.5
0.0
0.0
-10.0
-20.0
-20.0 0.01 0.1 RL [kΩ] 1 10
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NJM2172
Channel Separation vs. EVR Control Voltage V+=3.5V,Vin=-10dBV,f=1kHz,Ta=25°C,A-Weighted 0 -20
Channel Separation vs. Supply Voltage VCNT=2.7V,Vin=-10dBV,f=1kHz,Ta=25°C,A-Weighted 0 -20
CS [dBV]
CS [dBV]
-40 -60 -80 -100 -120 0 1 VCNT [V] 2 3
A B B A
-40 -60 -80 -100 -120 2.5 3 3.5 4 V+ [V] 4.5 5 5.5
B A
A
B
Channel Separation vs. EVR Control Voltage V+=3.5V,Vin=-50dBV,f=1kHz,Ta=25°C,A-Weighted 3 2
CS [dBV]
3 2 1
EVR Deviation vs. Supply Voltage VCNT=2.7V,Vin=-50dBV,f=1kHz,Ta=25°C,A-Weighted
1 0 -1 -2 -3 0 1 VCNT [V] 2 3
AB [dB]
0
VCNT=1.5V,2V
-1 -2 -3 2.5 3 3.5 4 V+ [V] 4.5 5 5.5
EVR Deviation vs. Frequency VCNT=2.7V,Vin=-50dBV,Ta=25°C 3 2
AB [dB]
EVR Deviation vs. Temperature V+=3.5V,Vin=-50dBV,f=1kHz,VCNT=2.7V,A-Weighted 3 2 1 0 -1 -2 -3
VCNT=2V VCNT=1.5V
1
AB [dB]
0 -1 -2 -3 0.01
VCNT=1.5V,2V
0.1
1 f [kHz]
10
100
-50
0 Ta [°C]
50
100
[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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