NJM2749/2749
A
-
1
-
Ver.2009-01-13
Low Offset, Low Drift Dual JFET Input Operational Amplifier
■GENRRAL DESCRIPTION ■ PACKAGE OUTLINE
The NJM2749/2749A is a Precision dual JFET input operational
amplifier which includes low input offset voltage: 0.8mV (typ) / 2.5mV
(max) and 6µV/°C typical offset drift.
The NJM2749A is guaranteed 20µV/°C maximum offset drift to
perform a 100% tested.
The NJM2749/2749A have the following features: low bias current of
50pA (typ), high slew rate of 13V/µs (typ).
These features are suitable for signal processing amplifiers of
instrumentation, measurement and industrial applications such as
sensor amplifier, current sensing and sample-and-hold circuit.
■FEATURES
●Input Offset Voltage Drift NJM2749: ∆VIO/∆T= 6µV/°C typ.
NJM2749A: ∆VIO/∆T=20µV/°C max.
●Input Offset Voltage 2.5mV max. @Ta=25°C ~ 85°C
3.5mV max. @Ta= -40°C
●Input Bias Current IB= 50pA typ. 200pA max. @Ta=25°C
●Slew Rate SR=13V/µs typ. @Ta=25°C
●Operating Voltage Vopr= ±6.0V ~ ±16V
●Voltage Gain Av=100dB typ.
●Bipolar Technology
●Dual channel
●Package Outline NJM2749D, NJM2749AD : DIP8
NJM2749M, NJM2749AM : DMP8
NJM2749E, NJM2749AE : SOP8 JEDEC 150mil
■PIN CONFIGURATION
8
7
6
5
1
2
3
4
A
B
OUTPUT
A
V
−
−INPUT
A
+INPUT
A
V
+
+INPUT B
OUTPUT B
−INPUT B
(Top View)
NJM2749/2749A
NJM2749D / 2749AD
( DIP8 )
NJM2749M / 2749AM
( DMP8 )
NJM2749E / 2749AE
( SOP8 )
NJM2749/2749A
-
2
-Ver.2009-01-13
■ABSOLUTE MAXIMUM RATING (Ta=25°C unless otherwise specified)
PARAMETER SYMBOL RATING UNIT
Supply Voltage V+/V- ±18 V
Common Mode Input Voltage VICM ±15 (Note1) V
Differential Input Voltage VID ±30 V
500 [ DIP8 ], 300 [ DMP8,SOP8 ] mW
430 [ DMP8 ], 640 [ SOP8 ] (Note2) mW
Power Dissipation PD
580 [ DMP8 ] ,1000 [ SOP8 ] (Note3) mW
Operating Temperature Range Topr -40 ~ +85 °C
Storage Temperature Range Tstg -50 ~ +125 °C
(Note1) For supply voltage less than ±18V, the maximum input voltage is equal to the supply voltage.
(Note2) Mounted on the EIA/JEDEC standard board (76.2×114.3×1.6mm, two layer, FR-4).
(Note3) Mounted on the EIA/JEDEC standard board (76.2×114.3×1.6mm, four layer, FR-4).
■RECOMMENDED OPERATING VOLTAGE (Ta=25°C)
PARAMETER SYMBOL RATING MIN. TYP. MAX. UNIT
Supply Voltage V+/V- ±6 - ±16 V
■ELECTRONIC CHARACTERISTICS
•DC CHARACTERISTICS (V+/V-=±15V, Ta=-40 to +85°C (Note4) unless otherwise specified)
PARAMETER SYMBOL CONDITION MIN. TYP. MAX. UNIT
NJM2749A - 6 20
Input Offset Voltage Drift ΔVIO/ΔT
NJM2749
(Note5, 6)
- 6 -
µV/°C
Input Offset Voltage1 VIO1 R
S=50Ω, Ta=+85°C (Note6, 7) - 0.7 2.5 mV
Input Offset Voltage2 VIO2 R
S=50Ω, Ta=+25°C (Note6, 7) - 0.8 2.5 mV
Input Offset Voltage3 VIO3 R
S=50Ω, Ta=−40°C (Note6, 7) - 1.0 3.5 mV
Common Mode Rejection Ratio CMR VICM=±10V (Note8) 76 92 - dB
Supply Voltage Rejection Ratio SVR V+/V−=±6V ~ ±16V (Note7, 9) 80 100 - dB
Input Common Mode Voltage Range 1 VICM1 CMR≥76dB (Note10) +10 +14.5 - V
Input Common Mode Voltage Range 2 VICM2 CMR≥76dB (Note10) - −11 −10 V
Input Bias Current 1 IB1 Ta=+25°C (Note7) - 50 200 pA
Input Bias Current 2 IB2 Ta=+85°C (Note7) - - 4 nA
Input Offset Current 1 IIO1 Ta=+25°C (Note7) - 25 100 pA
Input Offset Current 2 IIO2 Ta=+85°C (Note7) - - 2 nA
Voltage Gain 1 Av1 RL=2kΩ, Vo=±10V, Ta=+25°C 88 100 - dB
Voltage Gain 2 Av2 RL=2kΩ, Vo=±10V 82 100 - dB
Maximum Output Voltage 1 VOM1 R
L=10kΩ ±12 ±13.5 - V
Maximum Output Voltage 2 VOM2 R
L=2kΩ ±10 ±11.5 - V
Supply Current Icc Voltage Follower, RL=∞ (Note7) - 3.8 5.6 mA
NJM2749/2749A
-
3
-
Ver.2008-01-13
(Note4) These devices are measured under three temperature conditions of Ta=−40°C, +25°C, +85°C.
(Note5) Temperature coefficient is calculated by specified change in offset voltage. (Changes Ta=+25°C to −40°C and Ta=+25°C to +85°C)
NJM2749A is guaranteed maximum specification because these are 100% tested to operating temperature range.
NJM2749 is guaranteed only typical specification.
(Note6) Written by the absolute rate.
(Note7) Measured at VICM=0V
(Note8) CMR is calculated by specified change in offset voltage. (VICM=0V to +10V and VICM=0V to −10V)
(Note9) SVR is calculated by specified change in offset voltage. (V+/V−=±6V to ±16V)
(Note10) VICM is input common mode voltage when tested meets specified change in offset voltage is CMR≥76dB.
(A point of reference is offset voltage of VICM=0V)
•AC CHARACTERISTICS (V+/V−=±15V, Ta=+25°C unless otherwise specified)
PARAMETER SYMBOL CONDITION MIN. TYP. MAX. UNIT
Gain Bandwidth Product GB f=10kHz − 2.2 − MHz
Unity Gain Frequency fT AV=+100, RS=100Ω, RL=∞, CL=10pF − 2 − MHz
Phase Margin ΦM AV=+100, RS=100Ω, RL=∞, CL=10pF − 55 − deg
Input Noise Voltage1 VNI1 f=1kHz, AV=+100, RS=100Ω, RL=∞ − 20 − nV/√Hz
Input Noise Voltage2 VNI2 RIAA, RS=2.2kΩ, 30kHz, LPF − 2.5 − µVrms
Total Harmonic Distortion THD f=1kHz, AV=+10, RS=1kΩ, RL=∞, VO=5Vrms − 0.005 − %
Channel Separation CS F=1kHz, AV=-100, RS=1kΩ, RL=10kΩ − 120 − dB
•TRANSIENT CHARACTERISTICS (V+/V-=±15V, Ta=+25°C unless otherwise specified)
PARAMETER SYMBOL CONDITION MIN. TYP. MAX. UNIT
Positive Slew Rate +SR AV=+1, VIN=2Vpp, RL=10kΩ, CL=10pF − 14 − V/μs
Negative Slew Rate -SR AV=+1, VIN=2Vpp, RL=10kΩ, CL=10pF − 12 − V/μs
NJM2749/2749A
-
4
-Ver.2009-01-13
■IMPORTANT CONSIDERATIONS FOR USE OF NJM2749/2749A
•Supply Current
When Ta≥25°C, Power Dissipation PD is limited by junction temperature (TJ=125°C)
So maximum supply current is influenced by package, mounting board (board size, area of cupper foil), Mounting condition and
etc.
Following DMP8 Power Dissipation characteristic is a characteristic when mounted the following conditions supply.
• Two layer board: EIA/JEDEC 76.2×114.3×1.6mm, FR-4
• Four layer board: EIA/JEDEC 76.2×114.3×1.6mm, FR-4
Please refer to "Method of measuring the package thermal characteristic" published in our company web site for detailed
information on the thermal characteristic.
Maximum Power Dissipation
− Ambient Temperature
(DMP8)
0
100
200
300
400
500
600
0 20406080100
Ambient Temperature [ºC]
Power Dissipation PD [mW]
EIA/JEDEC
4-Layer
EIA/JEDEC
2-Layer
Package
Only
Maximum Power Dissipation
− Ambient Temperature
(DIP8)
0
100
200
300
400
500
600
0 20406080100
Ambient Temperature [ºC]
Power Dissipation PD [mW]
Maximum Power Dissipation
- Ambient Temperature
(EMP8)
0
200
400
600
800
1000
1200
0 20406080100
Ambient Temperature [
º
C]
Power Dissipation PD [mW]
EIA/JEDEC
4-Layer
EIA/JEDEC
2-Layer
Unit
NJM2749/2749A
-
5
-
Ver.2008-01-13
■IMPORTANT CONSIDERATIONS FOR USE OF NJM2749/2749A
•THE OSCILLATION WITH A CAPACITIVE LOAD
NJM2749/2749A tends to oscillate easily when it uses voltage-follower, and driving capacitive load.
The figure below is a “Voltage Gain - Frequency characteristic” in the Voltage-Follower. (It is not the one to guarantee the
characteristic of the product.)
Especially, it becomes easy to oscillate in the condition that the input voltage (output voltage) is near the minus supply voltage
side and the condition with large output sink current. We will recommend use by some circuit gains.
•INPUT COMMON MODE VOLTAGE RANGE
In this product, the input offset voltage drift is measured based on the input offset voltage at VICM=0V, and the input voltage
range that satisfies the common mode rejection ratio 76dB is defined as the input common mode voltage range.
As an electric characteristic, VICM=−10V~+10V at Supply Voltage V+/V−=±15V is guaranteed.
It becomes below formula about the input common mode voltage range when the supply voltage changes.
+VICM: (V+ supply) − 5 [V] · · · reference
−VICM: (V− supply) + 5 [V] · · · reference
This figure below is “Input common mode voltage range – Supply voltage characteristics”. (It is not the one to guarantee the
characteristic of the product.)
+ VICM is limited by the absolute maximum rating (V+ supply) within the input common mode voltage range.
Moreover, −VICM tends to rise by lowering of the supply voltage.
•OTHERS
For the NJM2749/2749A are high-precision products, a surface leak by dirt and/or condensation on package can have a
detrimental effect on precise characteristics of these products.
You should pay close attention to environment of storage and usage.
Common Mode Input Voltage Range (+V
ICM
)
− Supply Voltage
(Ta=25ºC, CMR=76dB)
-2.0
-1.0
0.0
1.0
5101520
Supply Voltage V
+
/V
−
[V]
(V
+
Supply)−(+V
ICM
) [V]
Common Mode Input Voltage Range (−V
ICM
)
− Supply Voltage
(Ta=25ºC, CMR=76dB)
2.0
3.0
4.0
5.0
5 101520
Supply Voltage V
+
/V
−
[V]
(−V
ICM
)−(V
−
Supply) [V]
Voltage Gain − Frequency
(V
+
/V
−
=±15V, Voltage Follower,
C
L
=100pF, I
SINK
=1mA, Ta=25ºC)
-5
0
5
10
15
10k 100k 1000k 10000k
Frequency [HZ]
Voltage Gain [dB]
V
O
=-10V
V
O
=0V
V
O
=+10V
1M 10M
Voltage Gain − Frequency
(V+/V−=±15V, Voltage Follower,
CL=100pF, VO=−10V, Ta=25ºC)
-5
0
5
10
15
10k 100k 1000k 10000k
Frequency [HZ]
Voltage Gain [dB]
ISINK=5mA
ISINK=2mA
ISINK=1mA
1M 10M
NJM2749/2749A
-
6
-Ver.2009-01-13
■TYPICAL CHARACTERISTICS
Input Offset Voltage Temperature Coefficient
Distribution
(V+/V-=±15V, Ta=-40ºC→+25ºC)
0
100
200
300
-20
-16
-12
-8
-4
0
4
8
12
16
20
Distribution [μV/ºC]
Number Of Units
Input Offset Voltage Temperature Coefficient
Distribution
(V+/V-=±15V, Ta=+25ºC→+85ºC)
0
100
200
300
-20
-16
-12
-8
-4
0
4
8
12
16
20
Distribution [μV/ºC]
Number Of Units
Input Offset Voltage Drift
− Common Mode Input Voltage
(V+/V−=±15V)
-1000
-500
0
500
1000
-15 -10 -5 0 5 10 15
Common Mode Input Voltage [V]
Input Offset Voltage Drift [μV]
Ta=85ºC
Ta=25ºC
Ta=-40ºC
Input Offset Voltage Drift
− Common Mode Input Voltage
(V+/V−=±15V, Ta=25ºC, VICM=0V of Reference)
-1000
-500
0
500
1000
-15 -10 -5 0 5 10 15
Common Mode Input Voltage [V]
Input Offset Voltage Drift [μV]
Input Offset Voltage − Ambient Temperature
(V+/V−=±15V)
-2000
-1000
0
1000
2000
-50 -25 0 25 50 75 100
Ambient Temperature [ºC]
Input Offset Voltage [μV]
Input Offset Voltage Drift − Supply Voltage
(V+/V−=±15V of Reference)
-1000
-500
0
500
1000
5101520
Supply Voltage V+/V− [V]
Input Offset Voltage Drift [μV]
Ta=85ºC
Ta=-40ºC
Ta=25ºC
NJM2749/2749A
-
7
-
Ver.2008-01-13
■TYPICAL CHARACTERISTICS
Common Mode Rejection Ratio
− Ambient Temperature
(V+/V−=±15V, VICM=0V → −10V)
70
80
90
100
110
-50 -25 0 25 50 75 100 125
Ambient Temperature [ºC]
Common Mode Rejection Ratio
CMR [dB]
Supply Voltage Rejection Ratio
− Ambient Temperature
(V+/V−=±6V → ±16V)
70
80
90
100
110
-50 -25 0 25 50 75 100 125
Ambient Temperature [ºC]
Supply Voltage Rejection Ratio
SVR [dB]
Common Mode Rejection Ratio − Frequency
(Input Ripple Voltage=1VPP, V+/V−=±15V, AV=60dB)
0
20
40
60
80
100
120
0k 0k 1k 10k 100k 1000k
Frequency [kHz]
Common Mode Rejection Ratio
CMR [dB]
Ta=-40°C
Ta=25°C
Ta=85°C
10 100 1M
Common Mode Rejection Ratio − Frequency
(Input Ripple Voltage=1VPP, V+/V−=±6V, AV=60dB)
0
20
40
60
80
100
120
0k 0k 1k 10k 100k 1000k
Frequency [Hz]
Common Mode Rejection Ratio
CMR [dB]
Ta=-40°C
Ta=25°C
Ta=85°C
10 100 1M
Supply Voltage Rejection Ratio (+Supply)
− Frequency
(Ripple Voltage=1VPP, V+/V−=±15V, AV=40dB)
0
20
40
60
80
100
120
0k 0k 1k 10k 100k 1000k
Frequency [Hz]
Supply Voltage Rejection Ratio
SVR [dB]
Ta=85°C
Ta=25°C
Ta=-40°C
10 100 1M
Supply Voltage Rejection Ratio (−Supply)
− Frequency
(Ripple Voltage=1VPP, V+/V−=±15V, AV=40dB )
0
20
40
60
80
100
120
0k 0k 1k 10k 100k 1000k
Frequency [Hz]
Supply Voltage Rejection Ratio
SVR [dB]
Ta=85°C
Ta=25°C
Ta=-40°C
10 100 1M
NJM2749/2749A
-
8
-Ver.2009-01-13
■TYPICAL CHARACTERISTICS
Input Bias Current − Common Mode Input Voltage
(V+/V−=±15V, Ta=25ºC)
0
50
100
-15 -10 -5 0 5 10 15
Common Mode Input Voltage VICM [V]
Input Bias Current IB [pA]
Input Bias Current − Supply Voltage
(Ta=25ºC, VICM=0V)
0
50
100
5 101520
Supply Voltage V+/V− [V]
Input Bias Current IB [pA]
Input Bias Current − Ambient Temperature
(V+/V−=±15V, VICM=0V)
1
10
100
1000
10000
-50 -25 0 25 50 75 100 125
Ambient Temperature [ºC]
Input Bias Current IB [pA]
Input Offset Current − Ambient Temperature
(V+/V−=±15V, VICM=0V)
-600
-400
-200
0
200
400
600
-50 -25 0 25 50 75 100 125
Ambient Temperature [ºC]
Input Offset Current IIO [pA]
Supply Current − Supply Voltage
(Voltage Follower, RL=open)
2
3
4
5
6
5101520
Supply Voltage V+/V− [V]
Supply Current ICC [mA]
Ta=85ºC
Ta=-40ºC
Ta=25ºC
Supply Current − Ambient Temperature
(V+/V−=±15V, Voltage Follower, RL=open)
2
3
4
5
6
-50 -25 0 25 50 75 100 125
Ambient Temperature [ºC]
Supply Current ICC [mA]
NJM2749/2749A
-
9
-
Ver.2008-01-13
■TYPICAL CHARACTERISTICS
Maximum Output Voltage (+VOM)
− Output Source Current
(V+/V−=±15V)
11
12
13
14
15
0 10203040
Output Source Current ISOURCE [mA]
Maximum Output Voltage
+VOM [V]
Ta=85ºC
Ta=-40ºC
Ta=25ºC
Output Saturation Voltage (+VOS) − Supply Voltage
(Ta=25ºC)
0.0
0.5
1.0
1.5
5101520
Supply Voltage V+/V− [V]
Output Saturation Voltage
+VOS [V]
ISOURCE=10mA
ISOURCE=2mA
ISOURCE=5mA
+VOS=(V+) - (+VOM)
Maximum Output Voltage (−VOM)
− Output Sink Current
(V+/V−=±15V)
-14
-13
-12
-11
-10
0 10203040
Output Sink Current ISINK [mA]
Maximum Output Current −VOM
[V]
Ta=85ºC
Ta=-40ºC
Ta=25ºC
Output Saturation Voltage (−VOS) − Supply Voltage
(Ta=25ºC)
1.0
1.5
2.0
2.5
5101520
Supply Voltage V+/V− [V]
Output Saturation Voltage
−VOS [V]
-VOS=(-VOM) - (V-)
ISINK=10mA
ISINK=2mA
ISINK=5mA
Voltage Gain − Ambient Temperature
(V+/V−=±15V, VO=±10V, RL=2kΩ)
90
100
110
120
130
-50 -25 0 25 50 75 100 125
Ambient Temperature [ºC]
Voltage Gain AV [dB]
Unity−Gain Frequency − Ambient Temperature
(V+/V−=±15V, 40dBAMP, CL=10pF)
1
1.5
2
2.5
3
-50 -25 0 25 50 75 100 125
Ambient Temperature [ºC]
Unity−Gain Frequency fT [MHz]
NJM2749/2749A
-
10
-Ver.2009-01-13
■TYPICAL CHARACTERISTICS
Gain/Phase − Frequency
(V+/V−=±15V, 40dBAMP, CL=100pF, Ta=25ºC)
-10
0
10
20
30
40
50
1k 10k 100k 1000k 10000k
Frequency [Hz]
Voltage Gain AV [dB]
-180
-135
-90
-45
0
45
90
Phase φ [deg]
Gain
Phase
1M 10M
Gain/Phase − Frequency
(V+/V−=±6V, 40dBAMP, CL=100pF, Ta=25ºC)
-10
0
10
20
30
40
50
1 10 100 1000 10000
Frequency [kHz]
Voltage Gain AV [dB]
-180
-135
-90
-45
0
45
90
Phase φ [deg]
Gain
Phase
1M 10M
Voltage Gain − Frequency
(V+/V−=±15V, Voltage Follower, RL=2kΩ, Ta=25ºC)
-5
0
5
10
0M 1M 10M
Frequency [Hz]
Voltage Gain AV [dB]
CL=100pF
CL=47pF
CL=10pF
100k
Voltage Gain − Frequency
(V+/V−=±6V, Voltage Follower, RL=2kΩ, Ta=25ºC)
-5
0
5
10
0M 1M 10M
Frequency [Hz]
Voltage Gain AV [dB]
CL=100pF
CL=47pF
CL=10pF
100k
Voltage Gain − Frequency
(V+/V−=±15V, Voltage Follower, RL=2kΩ, CL=100pF)
-5
0
5
10
0M 1M 10M
Frequency [Hz]
Voltage Gain AV [dB]
Ta=85ºC
Ta=-40ºC
Ta=25ºC
100k
Voltage Gain − Frequency
(V+/V−=±6V, Voltage Follower, RL=2kΩ, CL=100pF)
-5
0
5
10
0M 1M 10M
Frequency [Hz]
Voltage Gain AV [dB]
Ta=85ºC
Ta=-40ºC
Ta=25ºC
100k
NJM2749/2749A
-
11
-
Ver.2008-01-13
■TYPICAL CHARACTERISTICS
Slew Rate − Ambient Temperature
(V+/V−=±15V, Voltage Follower, VO=±1V, RL=2kΩ)
5
10
15
20
-50 -25 0 25 50 75 100 125
Ambient Temperature [ºC]
Slew Rate SR [V/μs]
+SR
-SR
Slew Rate − Supply Voltage
(Voltage Follower, VO=±1V, RL=2kΩ, Ta=25ºC)
5
10
15
20
5101520
Supply Voltage V+/V− [V]
Slew Rate SR [V/μs]
+SR
-SR
THD+N − Output Voltage
(RF=9kΩ, V+/V−=±15V, AV=+10, RL=open, Ta=25ºC)
0.001
0.01
0.1
1
0.01 0.1 1 10
Output Voltage VO [Vrms]
THD+N [%]
20kHz
20Hz
1kHz
THD+N − Frequency
(RF=9kΩ, V+/V−=±15V, AV=+10, RL=open, Ta=25ºC)
0.001
0.01
0.1
1
0k 0k 1k 10k 100k
Frequency [Hz]
THD+N [%]
VO=7.07Vrms
VO=5Vrms
10 100
THD+N − Output Voltage
(RF=1.8kΩ, V+/V−=±15V, AV=+10, RL=open, Ta=25ºC)
0.001
0.01
0.1
1
0.01 0.1 1 10
Output Voltage VO [Vrms]
THD+N [%]
20kHz
20Hz
1kHz
THD+N − Frequency
(RF=1.8kΩ, V+/V−=±15V, AV=+10, RL=open, Ta=25ºC)
0.001
0.01
0.1
1
0k 0k 1k 10k 100k
Frequency [Hz]
THD+N [%]
VO=7.07Vrms
VO=5Vrms
10 100
NJM2749/2749A
-
12
-Ver.2009-01-13
■TYPICAL CHARACTERISTICS
Equivalent Input Noise Voltage − Frequency
(V+/V−=±15V, 40dBAMP, RS=100Ω, Ta=25ºC)
0
10
20
30
40
50
60
1 10 100 1000 10000
Frequency [Hz]
Equivalent Input Noise Voltage
VNI [nV/√Hz]
1k 10k
[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.
