NJRC NJM2172V

NJM2172
OPERATIONAL AMPLIFIER WITH EVR
■ 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.
■ FEATURES
● Low Power Supply Voltage
● Low Operating Current
● A/Bch EVR adjust is separately
● EVR range
● Drivability
● Bipolar Technology
● Package Outline
13
-3.0 to -95dB
100Ω typ.
SSOP14
■ PIN CONFIGURATION
12
11
10
9
8
Bch
VCA
Bch OPAMP
Bch EVR AMP VREF AMP
Bch EVR
Bch EVR Control
Ach EVR
Ach EVR Control
Ach EVR AMP
Ach OPAMP
Ach
VCA
1
2
NJM2172V
V+ = 2.7 to 5.5V
Icc = 5.0mA typ.
■ BLOCK DIAGRAM
14
■ PACKAGE OUTLINE
3
4
5
6
7
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
-1-
NJM2172
■ ABSOLUTE MAXIMUM RATING
PARAMETER
RATINGS
Supply Voltage
Storage Temperature Range
Operating Temperature Range
Power Dissipation
+7.0
-50 to +150
-40 to +85
300
(Ta=25°C)
SYMBOL(UNIT)
OTHERS
VDD (V)
Tstg (°C)
Topr (°C)
PD (mW)
SSOP14(ONLY)
■ERECTRICAL CHARACTERISTICS (V+=3.5V, Crefin=10pF,Cref=1µF, f=1kHz, Ta=25°C unless otherwise noted)
● SUPPLY
PARAMETER
Operating Current
Reference Voltage
SYMBOL
ICC
Vref
TEST CONDITION
RL=∞
RL=∞
MIN.
TYP.
MAX.
UNIT
TEST
CIRCUIT
1.45
5.0
1.55
7.5
1.65
mA
V
1
1
MIN.
TYP.
MAX.
UNIT
TEST
CIRCUIT
-
1.0
6.0
mV
3
-
100
300
nA
3
60
80
-
dB
3
-3.0
0
-
dBV
( 0.7 )
( 1.0 )
(-)
(Vrms)
0.55 to 2.55
-
-
V
-100
-90
dBV
● OP-AMP SECTION
PARAMETER
SYMBOL
TEST CONDITION
Input Offset Voltage
VIO
Input Bias Current
IIB
Voltage Gain 1
GV1
RL≤10kΩ
Maximum Output
Voltage Swing 1
VOM1
THD=1%, RL≥2.5kΩ
Input Common Mode
Voltage Range
VICM
Output Noise Voltage
VON1
Rs=600Ω / A-Weighted
CMR
RS≤10kΩ
60
74
-
dB
3
SVR
RS≤10kΩ
60
80
-
dB
3
-
2
-
MHz
-
Common Mode
Rejection Ratio
Supply Voltage
Rejection Ratio
Gain Bandwidth
Product
-2-
GB
RS≤10kΩ
-
-
( 10.0 )
( 30.0 ) (µVrms)
2
1
NJM2172
● EVR SECTION
PARAMETER
(VCNT=2.7V, RL=100Ω unless otherwise noted)
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
TEST
CIRCUIT
Voltage Gain 2
GV2
VIN = -10dBV
-6.0
-3.0
0.0
dB
1
Total Harmonic
Distortion
THD
VIN = -10dBV
-
0.15
1.0
%
2
EVR Gain
GEVR
80
90
-
dB
1
Output Noise
Voltage 2
VNO2
RS = 600Ω / A - Weighted
-95
-85
dBV
(18.0)
(56.0)
(µVrms)
Maximum Output
Voltage Swing 2
VOM2
THD = 1%
Channel
Separation
CS
A/B1
EVR Deviation
A/B2
VIN=-10dBV/VCNT=2.7Vto GND
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
-5.0
-3.0
( 0.56 )
( 0.71 )
-
-3.0
-
dBV
(Vrms)
-79
-70
dBV
( 110 )
( 320 )
(µVrms)
0.0
3.0
dB
-3.0
0.0
1
2
1
1
3.0
*1: Ach Amp with Bch=0dB
-3-
NJM2172
■ TEST CIRCUIT 1
1µ
SW3
10k
A-Weight
2.5k
V
VO1
SW4
SW1
1µ
SW5
a
VREF
47µ
A-Weight
VO2
b
100
SW2
600
1
VI1
2
3
10µ
1µ
V
V
10
4
9
8
VCA
OPAMP
VREF AMP
EVR AMP
EVR Control
EVR
1
2
3
4
5
Ach
1
2
3
4
5
pin
Bch
14
13
12
11
6
pin
5
VCNT
Fig.1
Test circuit 1 shows only Ach.
-4-
7
A
ICC
+
V
47µ
NJM2172
■ TEST CIRCUIT 2
1µ
10k
2.5k
SW6
1µ
10k
VO3
V
47µ
20k
VO4
1
2
3
1µ
V
100
SW7
VI2
10µ
10
4
9
8
VCA
OPAMP
EVR AMP
VREF AMP
EVR Control
EVR
1
2
3
4
5
Ach
1
2
3
4
5
pin
Bch
14
13
12
11
6
pin
5
VCNT
7
+
V
47µ
Fig.2
Test circuit 2 shows only Ach.
-5-
NJM2172
■ TEST CIRCUIT 3
Ec
50
50k
50
NULL
50k 10k
10k
10k 10k Ek
SW9
VF
V
10µ
1µ
SW8
2
1
VCC
10
3
9
8
VCA
OPAMP
EVR
EVR AMP
VREF AMP
EVR Control
1
2
3
5
Ach
1
2
3
5
pin
Bch
14
13
12
6
pin
5
7
+
V
Fig.3
Test circuit 3 shows only Ach.
-6-
47µ
NJM2172
■ PIN INFORMATION
Pin No.
1
2
Pin Name
OP+IN A
OP-IN A
Function
Ach OP-AMP + Input
Ach OP-AMP - Input
3
4
5
6
7
8
OPOUTA
EVROUT A
VCNT A
VCNT B
+
V
GND
Ach OP-AMP Output / EVR Input
Ach EVR Output
Ach EVR Control
Bch EVR Control
Power Supply
GND
9
VREF
Internal Reference Output
10
11
12
REFIN
EVROUT B
OPOUT B
Internal Reference Input
Bch EVR Output
Bch OP-AMP Output / EVR Input
13
14
OP-IN B
OP+IN B
Bch OP-AMP - Input
Bch OP-AMP + Input
-7-
NJM2172
■ EQUIVALENT CIRCUIT
Term. No.
Term.
Name
Equivalent Circuit
Terminal
Voltage
Note
1.55V
-
1.55V
OPOUTA / OPOUTB
Load:
1.55V
EVROUTA / EVROUTB
Load:
V+
1
2
13
14
OP+INA
OP-INA
OP-INB
OP+INB
2,13
1,14
V+
100
3
12
14k
OPOUTA
OPOUTB
RL≥2.5kΩ
3,12
V+
10
4
11
-8-
EVROUTA
EVROUTB
4,11
RL≥100Ω
NJM2172
Term. No.
Term.
Name
Equivalent Circuit
Terminal
Voltage
Note
-
Input EVR control
voltage
V+
5,6
5
6
VCNT A
VCNT B
154k
26k
V+
40k
10
9
10
VREF
REFIN
9
52k
Terminal Voltage is
-
52 / (52+40)×
+
(V - VBE)
RL≥2KΩ
-9-
NJM2172
■ APPLICATION CIRCUIT 1
Voltage follower
10k
47µ
1µ
10µ
VIN
1µ
RL
1
2
3
10
4
9
8
VCA
EVR AMP
OPAMP
VREF AMP
EVR Control
EVR
1
2
3
4
5
Ach
1
2
3
4
5
pin
Bch
14
13
12
11
6
pin
7
5
VCNT
Fig.4
Application circuit 1 shows only Ach.
- 10 -
+
V
47µ
NJM2172
■ APPLICATION CIRCUIT 2
Invert Circuit (Gv=6dB)
10k
1µ
10k
47µ
20k
10µ
VIN
1µ
RL
2
1
3
10
4
9
8
VCA
OPAMP
EVR AMP
EVR
1
VREF AMP
EVR Control
2
3
4
5
Ach
1
2
3
4
5
pin
Bch
14
13
12
11
6
pin
7
5
VCNT
+
V
47µ
Fig.5
Application circuit 2 shows only Ach.
- 11 -
NJM2172
■ TYPICAL CHARACTERISTICS
Quiescent Current vs. Supply Voltage Ta=25°C
Internal Reference Voltage vs. Supply Voltage Ta=25°C
3.0
8.0
VREF [V]
ICC [mA]
6.0
4.0
2.0
1.0
2.0
0.0
0.0
2.5
3.0
3.5
4.0
4.5
5.0
2.5
5.5
3.0
3.5
4.0
4.5
5.0
5.5
V+ [V]
V+ [V]
Internal Reference Voltage vs. Temperature V+=3.5V
Quiescent Current vs. Temperature V+=3.5V
3.0
8.0
6.0
VREF [V]
ICC [mA]
2.0
4.0
1.0
2.0
0.0
0.0
-50
0
50
-50
100
0
50
100
Ta [°C]
Ta [°C]
Input Offset Voltage vs. Supply Voltage Ta=25°C
Input Bias Current vs. Supply Voltage Ta=25°C
3.0
300
200
1.0
IB [nA]
VIO [mV]
2.0
0.0
-1.0
100
-2.0
0
-3.0
2.5
3.0
3.5
4.0
4.5
5.0
2.5
5.5
3.0
3.5
4.0
4.5
5.0
5.5
V+ [V]
V+ [V]
Input Offset Voltage vs. Temperature V+=3.5V
Input Bias Current vs. Temperature V+=3.5V
3.0
300
1.0
200
IB [nA]
VIO [mV]
2.0
0.0
100
-1.0
-2.0
0
-3.0
-50
0
50
Ta [°C]
- 12 -
100
-50
0
50
Ta [°C]
100
NJM2172
Voltage Gain 1 vs. Frequency
V+=3.5V,Ta=25°C,RL=2.5kΩ
Voltage Gain 1 / Phase vs. Frequency
V+=3.5V,Ta=25°C,RL=2.5kΩ,40dB Inverted Amp
100
60
GV1 [dB]
50
60
40
Phase
-30
Gain
-90
40
30
20
-150
10
20
0
0
0.001
-10
0.01
0.1
1
10
100
1000
10000
0.1
1
10
f [kHz]
100
1000
-210
10000
f [kHz]
Voltage Gain1 vs. Temperature V+=3.5V
Common Mode Rejection Ratio vs. Temperature V+=3.5V
150
150
100
100
CMR [dB]
GV1 [dB]
φ [° ]
80
GV1 [dB]
30
70
50
0
50
0
-50
0
50
100
-50
0
50
Ta [°C]
100
Ta [°C]
Total Harmonic Distortion (OPAMP) vs. Output Level
(Temperature)
V+=3.5V,f=1kHz,BW=400Hz-30kHz
Supply Voltage Rejection Ratio vs. Temperature V+=3.5V
150
10
THD [%]
SVR [dB]
1
100
50
0.1
85°C,25°C
0.01
-40°C
0.001
0
-50
0
50
Ta [°C]
100
-60
-40
-20
0
20
Output Level [dBV]
- 13 -
NJM2172
Maximum Output Voltage 1 vs. Supply Voltage
RL=2.5kΩ,f=1kHz,THD=1%,Ta=25°C
Maximum Output Voltage 1 vs. Load Resistance
V+=3.5V,f=1kHz,THD=1%,Ta=25°C
10.0
VOM1 [dBV]
VOM1 [dBV]
10.0
0.0
-10.0
0.0
-10.0
-20.0
-20.0
2.5
3.5
4.5
0.1
5.5
1
V+ [V]
20
20
0
0
-20
-20
-40
-60
-40
-80
-80
-100
-120
-120
1
1.5
2
2.5
2.7V
-60
-100
0.5
3
3.5V,5.5V
0
0.5
1
VCNT [V]
2
2.5
3
Voltage Gain 2 / Temperature vs. EVR Control Voltage
V+=3.5V,f=1kHz,Vin=-10dBV
20
20
0
0
-20
-20
GV2 [dB]
GV2 [dB]
1.5
VCNT [V]
Voltage Gain 2 / Frequency vs. EVR Control Voltage
V+=3.5V,Vin=-10dBV,Ta=25°C
-40
-60
10kHz
-80
-40
85°C
-60
-80
-100
25°C
-100
1kHz,100Hz
-120
-40°C
-120
0
0.5
1
1.5
VCNT [V]
- 14 -
100
Voltage Gain 2 / Supply Voltage vs. EVR Control Voltage
f=1kHz,Vin=-10dBV,Ta=25°C
GV2 [dB]
GV2 [dB]
Voltage Gain 2 vs. EVR Control Voltage
V+=3.5V,f=1kHz,Vin=-10dBV,Ta=25°C
0
10
RL [kΩ]
2
2.5
3
0
0.5
1
1.5
VCNT [V]
2
2.5
3
NJM2172
Total Harmonic Distortion (EVR) vs. Output Level
(Frequency)
V+=3.5V,Ta=25°C
Total Harmonic Distortion (EVR) vs. Output Level
(Temperature)
V+=3.5V,f=1kHz,BW=400Hz-30kHz
10
f=10kHz
BW=22Hz-80kHz
1
THD [%]
THD [%]
10
0.1
1
-40°C
25°C
0.1
85°C
f=100Hz,1kHz
BW=22Hz-22kHz
0.01
0.01
-60
-40
-20
0
20
-60
Output Level [dBV]
-20
20
Output Noise Voltage 2 vs. Temperature
V+=3.5V,VCNT=2.7V,A-Weighted
0
-20
-20
-40
-40
VNO2 [dBV]
0
-60
-80
-100
-60
-80
-100
-120
-120
0
1
2
-50
3
0
VCNT [V]
50
100
Ta [°C]
Maximum Output Voltage 2 vs. Supply Voltage
RL=100Ω,f=1kHz,THD=1%,Ta=25°C
Maximum Output Voltage 2 vs. Load Resistance
V+=3.5V,f=1kHz,THD=1%,Ta=25°C
10.0
10.0
0.0
0.0
VOM2 [dBV]
VOM2 [dBV]
0
Output Level [dBV]
Output Noise Voltage 2 vs. EVR Control Voltage
V+=3.5V,Ta=25°C,A-Weighted
VNO2 [dBV]
-40
-10.0
-20.0
-10.0
-20.0
2.5
3.5
4.5
V+ [V]
5.5
0.01
0.1
1
10
RL [kΩ]
- 15 -
NJM2172
Channel Separation vs. Supply Voltage
VCNT=2.7V,Vin=-10dBV,f=1kHz,Ta=25°C,A-Weighted
0
0
-20
-20
-40
-40
-60
B
CS [dBV]
CS [dBV]
Channel Separation vs. EVR Control Voltage
V+=3.5V,Vin=-10dBV,f=1kHz,Ta=25°C,A-Weighted
A
-80
-100
A
-60
-80
-100
B
-120
1
2
3
2.5
3
3.5
VCNT [V]
A
B
4
4.5
5
5.5
V+ [V]
Channel Separation vs. EVR Control Voltage
V+=3.5V,Vin=-50dBV,f=1kHz,Ta=25°C,A-Weighted
EVR Deviation vs. Supply Voltage
VCNT=2.7V,Vin=-50dBV,f=1kHz,Ta=25°C,A-Weighted
3
3
2
2
1
1
AB [dB]
CS [dBV]
A
-120
0
0
-1
0
VCNT=1.5V,2V
-1
-2
-2
-3
-3
0
1
2
3
2.5
3
3.5
VCNT [V]
2
2
1
1
AB [dB]
3
0
VCNT=1.5V,2V
-3
0.01
-3
f [kHz]
5.5
10
100
VCNT=1.5V
-1
-2
1
5
0
-2
0.1
4.5
EVR Deviation vs. Temperature
V+=3.5V,Vin=-50dBV,f=1kHz,VCNT=2.7V,A-Weighted
3
-1
4
V+ [V]
EVR Deviation vs. Frequency
VCNT=2.7V,Vin=-50dBV,Ta=25°C
AB [dB]
B
VCNT=2V
-50
0
50
100
Ta [°C]
[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.
- 16 -