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NJM2723
High Speed Current Feedback Operational Amplifier
General Description The NJM2723 is a high speed, wide bandwidth and high output current feedback operational amplifier. Driving 150 load can expand the versatility of several multimedia applications. Current feedback technology has wide bandwidth and Low supply current. With a 75MHz at G=+2, 24MHzat G=+10, high slew rate of 2000V/s, second harmonic distortion -65dB and settling time of 50ns(0.1%) The NJM2723 makes it ideal for high frequency amplifier, active filter and pulse amplifier applications. Features High Speed Bandwidth 75MHz (-3dB, G=+2) Bandwidth 24MHz (-3dB, G=+10) Slew Rate 2000V/s For Video Applications (V+/V-=5V) Bandwidth 52MHz (-3dB, G=+2) Bandwidth 8MHz (0.1dB, G=+2) Differential Gain 0.05% Differential Phase 0.25deg Settling Time 50ns (0.1%, G=+2) Low Noise Voltage Noise 6nV/Hz (@1kHz) Current Noise 13pA/Hz (@1kHz) THD -60dBc (@10MHz) Specified for 5V and 15V operation 150 Drive Capability Output Voltage 3.5V min. (RL=150, V+/V-=15V) 2.4V min. (RL=150, V+/V-=5V) Supply Range 3.5V~17.5V Supply Current 5mA max. Applications High frequency amplifier Active Filter 150cable driver Video amplifier
150Drive High Slew Rate OP-AMP Lineup (Single) SR=250V/s SR=500V/s SR=2000V/s Voltage Feedback NJM2720 NJM2721 Current Feedback NJM2723
Package Outline
NJM2723D
NJM2723E
ORDER INFORMATION Parts NJM2723D NJM2723E
Package DIP8 EMP8
Pin Configuration
( Top View ) N.C. -INPUT +INPUT V1 2 3 4 8 7 6 5 N.C. V+ OUTPUT N.C.
Ver.2009-10-28
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NJM2723
ABSOLUTE MAXIMUM RATINGS (Ta=25C, unless otherwise noted.)
PARAMETER Supply Voltage Common Mode Input Voltage Range Differential Input Voltage Range Power Dissipation (Note4) SYMBOL VDD VICM VID PD RATING 18 18(Note1) 3(Note1) DIP8: 500 EMP8: 375 / 625 (Note2) / 875 (Note3) UNIT V V V mW C C
Operating Temperature Range Topr -40~+85 Storage Temperature Range Tstg -50~+150 (Note1) For supply voltage less than 18V, the absolute maximum rating is equal to the supply voltage. (Note2) On the PCB "EIA/JEDEC (114.3x76.2x1.6mm, 2 layers, FR-4)" (Note3) On the PCB "EIA/JEDEC (114.3x76.2x1.6mm, 4 layers, FR-4)" (Note4) See Figure "Power Dissipation Derating Curve" when ambient temperature is over 25C.
Power Dissipation Derating Curve 1000 900
Power Dissipation Pd (mW)
EMP8(Note3)
800 700 600 500 400 300 200 100 0 5 15 25 35 45 55 65 75 85 95 105 Ambient Temperature Ta (C)
EMP8 EMP8(Note2) DIP8
Pd (mW/C) Package DIP8 -4.0 EMP8 -3.0 -5.0 EMP8(Note2) -7.0 EMP8(Note3)
RECOMMENDED OPERATING VOLTAGE (Ta=25C)
PARAMETER Supply Voltage SYMBOL V /V
+ -
TEST CONDITION
MIN. 3.5
TYP. -
MAX. 17.5
UNIT V
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Ver.2009-10-28
NJM2723
ELECTRICAL CARACTERISTICS (Measurement is to be conducted as pulse testing.) DC CHARACTERISTICS (V+/V-=15V, Ta=25C, unless otherwise noted.)
PARAMETER Supply Current Input Offset Voltage Input Bias Current Transimpedance Common Mode Input Voltage Range Common Mode Rejection Ratio Supply Voltage Rejection Ratio Maximum Output Voltage Maximum Output Voltage SYMBOL Icc VIO IB+ IBZT VICM CMR SVR VOM VOM TEST CONDITION No Signal MIN. 1.0 11 56 66 11.5 3.5 TYP. 2.9 4 2 2 2.5 12 66 76 13 4.5 MAX. 5 20 20 20 UNIT mA mV uA uA M V dB dB V V
RL=1k, Vo=10V CMR56dB -11VVICM+11V +3.5VV /V 17.5V RL=1k RL=150
AC CHARACTERISTICS (V+/V-=15V, Ta=25C, unless otherwise noted.)
PARAMETER Bandwidth 0.1dB Flatness Slew Rate Slew Rate Settling Time 0.1% Equivalent Input Noise Voltage Equivalent Input Noise Current Total Harmonic Distortion 2nd Harmonic Distortion 3rd Harmonic Distortion SYMBOL BW-3dB TEST CONDITION GV=6dB, RF=680, RG=680, RL=1k, CL=1pF GV=20dB, RF=680, RG=75, RL=1k, CL=1pF GV=6dB, RF=680, RG=680, RL=1k, CL=1pF, Vo=10Vpp, measured20% to 80% GV=6dB, RF=680, RG=680, RL=1k, CL=1pF, Vo=20Vpp, measured20% to 80% GV=-1, RF=620, RG=620, RL=1k, CL=1pF, Vo=10Vpp f=100kHz f=100kHz GV=6dB, RF=680, RG=680, RL=1k, Vo=2Vpp, f=10MHz GV=6dB, RF=680, RG=680, RL=1k, Vo=2Vpp, f=10MHz GV=6dB, RF=680, RG=680, RL=1k, Vo=2Vpp, f=10MHz MIN. TYP. 75 24 12 1500 2000 50 6 13 -60 -65 -70 MAX. UNIT MHz MHz MHz V/us V/us ns nV/Hz pA/Hz dBc dB dB
BW0.1dB GV=6dB, RF=680, RG=680, RL=1k, CL=1pF SR SR ts Vni Ini+ THD HD2nd HD3nd
Ver.2009-10-28
-3-
NJM2723
ELECTRICAL CARACTERISTICS (Measurement is to be conducted as pulse testing.) DC CHARACTERISTICS (V+/V-=5V, Ta=25C, unless otherwise noted.)
PARAMETER Supply Current Input Offset Voltage Input Bias Current Transimpedance Common Mode Input Voltage Range Common Mode Rejection Ratio Supply Voltage Rejection Ratio Maximum Output Voltage Maximum Output Voltage SYMBOL Icc VIO IB+ IBZT VICM CMR SVR VOM VOM TEST CONDITION No Signal MIN. 0.25 2 50 66 2.8 2.4 TYP. 2.8 4 2 2 0.85 2.25 60 76 3.3 2.8 MAX. 4.5 20 20 20 UNIT mA mV uA uA M V dB dB V V
RL=150, Vo=2V CMR50 -2VICM+2 +3.5V /V 17.5 RL=1k RL=150
AC CHARACTERISTICS (V+/V-=5V, Ta=25C, unless otherwise noted.)
PARAMETER Bandwidth 0.1dB Flatness Slew Rate Settling Time 0.1% Equivalent Input Noise Voltage Equivalent Input Noise Current Total Harmonic Distortion 2nd Harmonic Distortion 3rd Harmonic Distortion Differential Gain Differential Phase SYMBOL BW-3dB TEST CONDITION GV=6dB, RF=680, RG=680, RL=150, CL=1pF GV=20dB, RF=680, RG=75, RL=150, CL=1pF GV=6dB, RF=680, RG=680, RL=150, CL=1pF, Vo=2Vpp GV=-1, RF=620, RG=620, RL=150, CL=1pF, Vo=2Vpp f=100kHz f=100kHz GV=6dB, RF=680, RG=680, RL=150, Vo=2Vpp, f=10MHz GV=6dB, RF=680, RG=680, RL=150, Vo=2Vpp, f=10MHz GV=6dB, RF=680, RG=680, RL=150, Vo=2Vpp, f=10MHz GV=6dB, RF=680, RG=680, RL=150, CL=1pF, VINDC=1/0, VIN=0.286V GV=6dB, RF=680, RG=680, RL=150, CL=1pF, VINDC=1/0, VIN=0.286V MIN. TYP. 52 16 8 180 50 5 13 -50 -60 -50 0.05 0.25 MAX. UNIT MHz MHz MHz V/us ns nV/Hz pA/Hz dBc dB dB % deg
BW0.1dB GV=6dB, RF=680, RG=680, RL=150, CL=1pF SR ts Vni Ini+ THD HD2nd HD3nd DG DP
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Ver.2009-10-28
NJM2723
TYPICAL CHARACTERISTICS
Supply Current vs. Supply Voltage 4 3.5
Supply Current [mA]
RF=680, RG=680, RT=50 Ta=+25C
Supply Current vs. Temperature 4.0
RF=680, RG=680, RT=50
Ta=+85C
3.5
Supply Current [mA]
V+/V-=15V
3 2.5 2 1.5 1 0.5 0 0 2.5 5 7.5 10 12.5 15 +Supply Voltage V /V [V] 17.5 20
Ta=-40C
3.0 2.5 2.0 1.5 1.0 0.5 0.0 -50 -25 0 25 50 75 100 125 150 Ambient Temperature [C]
V+/V-=5V
Maximum Output Voltage vs. Load Resistance 15 12 9
Output Voltage [V]
Ta=-40C Ta=+25C Ta=+85C V+/V-=15V, VIN=0.3V
Maximum Output Voltage vs. Load Resistance 5 4 3
Output Voltage [V]
V+/V-=5V, VIN=0.3V Ta=+85C
6 3 0 -3 -6 -9 -12 -15 10 0k
2 1 0 -1 -2 -3 -4 -5
Ta=+25C Ta=-40C
100 0k 1k 10k Load Resistance []
100k
10 0k
100 0k 1k 10k Load Resistance []
100k
Maximum Output Voltage vs. Supply Voltage 20
Maximum Output Voltage [V]
VIN=0.3V, RL=1k
Maximum Output Voltage vs. Supply Voltage 15
Maximum Output Voltage [V]
VIN=0.3V, RL=150
15 10 5 0 -5 -10 -15 -20 0 2.5 5 7.5 10 12.5 15 +Supply VoltageV /V [V] 17.5 20
Ta=-40C Ta=+85C Ta=+25C
Ta=-40C
10
Ta=+25C
5
Ta=+85C
0 -5 -10 -15 0 2.5 5 7.5 10 12.5 15 +Supply Voltage V /V [V] 17.5 20
Ver.2009-10-28
-5-
NJM2723
TYPICAL CHARACTERISTICS
Input Offset Voltage vs. Temperature
VIN=0V
Input Bias Current vs. Temperature 10.0 7.5
Input Bias Current [A]
V+/V-=15V, VIN=0V
20 15
Input Offset Voltage [mV]
10 5 0 -5 -10 -15 -20 -50 -25 0 25 50 75 100 125 150 Ambient Temperature [C]
V+/V-=15V V /V =5V
+ -
5.0
IB-
2.5 0.0 -2.5 -5.0 -7.5 -10.0 -50 -25 0 25 50 75 100 125 150 Ambient Temperature [C]
IB+
Input Bias Current vs. Temperature 10.0 7.5
Input Bias Current [A] Transimpedance [M]
V+/V-=5V, VIN=0V
5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0
Transimpedance vs. Temperature
5.0 2.5 0.0 -2.5 -5.0 -7.5 -10.0 -50 -25
IB+
V+/V-=15V RL=1k
IB-
V+/V-=5V RL=150
0 25 50 75 100 125 150 Ambient Temperature [C]
-50
-25
0 25 50 75 100 125 150 Ambient Temperature [C]
SVR vs. Temperature 100
Common Mode Rejection Ratio[dB]
CMR vs. Temperature
Supply Voltage Rejection Ratio [dB]
V+/V-=15V VICM=12V
100 90 80 70 60 50 40 30 20 10 0 -50 -25
V+/V-=3.5V~18V, ViN=0V
90 80 70 60 50 40 30 20 10 0 -50
V+/V-=5V VICM=2.25V
-25
0 25 50 75 100 125 150 Ambient Temperature[C]
0 25 50 75 100 125 150 Ambient Temperature [C]
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Ver.2009-10-28
NJM2723
TYPICAL CHARACTERISTICS
Gain vs. Frequency 40 30 20
Voltage Gain[dB] Voltage Gain[dB]
V+/V-=15V, RF=680, RL=1k, CL=0pF, Ta=25C
Gain vs. Frequency 40 30 20
V+/V-=5V, RF=680, RL=150, CL=0pF, Ta=25C
10 0 -10 -20 -30 -40 100k 0M
6dB
10 0 -10 -20 -30 -40 100k 0M
6dB
1M
10M 100M Frequency[Hz]
1G 1000M
1M
10M 100M Frequency[Hz]
1G 1000M
Gain vs. Frequency (Load Capacitance) 20 15 10
Voltage Gain[dB]
CL=300pF V+/V-=15V, Gv=+2, RF=680, RL=1k, Ta=25C
Gain vs. Frequency (Load Capacitance) 20 15 10
Voltage Gain[dB]
CL=300pF CL=10pF V+/V-=5V, Gv=+2, RF=680, RL=150, Ta=25C
CL=100pF
CL=100pF
CL=10pF
5 0 -5 -10 -15 -20 100k 0M
5 0 -5 -10 -15 -20 100k 0M
1M
10M 100M Frequency[Hz]
1G 1000M
1M
10M 100M Frequency[Hz]
1G 1000M
-3dB Bandwidth vs Feedback Resistor RF 120 100
-3dB Bandwidth [MHz]
V+/V-=15V RL=1k Gv=+2, Ta=25C
80 60 40 20 0 400
V+/V-=5V RL=150
800 1200 1600 Feedback Resistor RF []
2000
Ver.2009-10-28
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NJM2723
TYPICAL CHARACTERISTICS
Pulse Response
V+/V-=15V, Gv=+2, RF=680, RL=1k, CL=0pF, VO=10Vpp
Pulse Response
V+/V-=5V, Gv=2, RF=680, RL=150, CL=0pF, VO=2Vpp, Ta=25C
Input 2.5V/div.
Input 0.5V/div.
Output 5V/div.
Output 1V/div.
50ns/div.
50ns/div.
Pulse Response
V+/V-=15V, Gv=-1, RF=680, RL=1k, CL=0pF, VO=10Vpp
Pulse Response
V+/V-=5V, Gv=-1, RF=680, RL=150, CL=0pF, VO=2Vpp, Ta=25C
Input 5V/div.
Input 1V/div.
Output 5V/div.
Output 1V/div.
50ns/div.
50ns/div.
Slew Rate vs. Feedback Resistor RF 2000 1750 1500
Slew Rate [V/s]
rise V+/V-=15V, Gv=+2, Ta=25C (Measured from 20% to 80%)
1250 1000
fall
750 500 250 0 0.4k
0.8k 1.2k 1.6k Feedback Resistor RF []
2.0k
-8-
Ver.2009-10-28
NJM2723
TYPICAL CHARACTERISTICS
Input Noise vs. Frequency 100
V+/V-=15V, RL=1k, Ta=25C
Input Noise vs. Frequency 100 100
V+/V-=5V, RL=150, Ta=25C
100
Current Noise
Equivalent Input Noise Voltage [nV/Hz]
Equivalent Input Noise Current [pA/Hz]
Equivalent Input Noise Voltage [nV/Hz]
10
10
10
10
Voltage Noise
Voltage Noise
1 100 0k 1k 10k Frequency [Hz]
1 100k
1 100 0k 1k 10k Frequency [Hz]
1 100k
Ver.2009-10-28
-9-
Equivalent Input Noise Current [pA/Hz]
Current Noise
NJM2723
Application Note Choice of feedback resistor and gain resistor for current feedback operational Amplifier The NJM2723 is a current feedback operational amplifier. Closed-loop bandwidth depends on the feedback resistor value. Table1 shows recommended resistor values for a variety of useful closed-loop gains and supply voltages.
Figure1. Formula of non-inverting / inverting amplifier
RF RG
RF RG
VO
+
Gv=1+RF/RG
VIN
+
VO
VIN
Gv= -RF/RG
Table1. -3dB Bandwidth vs. Closed-loop Gain and Resistance Value V+/V-=15V Closed-Loop Gain +1 +2 +10 -1 -10 V+/V-=5V Closed-Loop Gain +1 +2 +10 -1 -10
RF[] 750 680 680 680 680
RG[] 680 75 680 68
-3dB BW[MHz] 120 76 20 65 25
RF[] 680 680 620 680 680
RG[] 680 68 680 68
-3dB BW[MHz] 85 52 15 50 20
In case of using Voltage follower The feedback resistance must be inserted when using a current feedback amplifier as the voltage follower. A current feedback amplifier cannot be used by connecting output pin and inverting input pin directly. (Figure2)
Figure2. Voltage follower circuit
RF
VIN
VO
+
In case of using capacitive Feedback For a current feedback amplifier stability operation, do not use a compensation capacitor in parallel with feedback resistance. The dynamic impedance of capacitor in the feedback loop reduces the amplifier's stability.
Figure3. Non-stability circuit example C RF RG
RF
VO
+
RG C VIN
+
VO
VIN
(a). C connects in paraliel with RF
(b). C connects to input pin
- 10 -
Ver.2009-10-28
NJM2723
MEMO
[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.
Ver.2009-10-28
- 11 -

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