LM4250
LM4250 Programmable Operational Amplifier
Literature Number: SNOSC17A
LM4250
Programmable Operational Amplifier
General Description
The LM4250 and LM4250C are extremely versatile program-
mable monolithic operational amplifiers. A single external
master bias current setting resistor programs the input bias
current, input offset current, quiescent power consumption,
slew rate, input noise, and the gain-bandwidth product. The
device is a truly general purpose operational amplifier.
The LM4250C is identical to the LM4250 except that the
LM4250C has its performance guaranteed over a 0˚C to
+70˚C temperature range instead of the −55˚C to +125˚C
temperature range of the LM4250.
Features
n±1V to ±18V power supply operation
n3 nA input offset current
nStandby power consumption as low as 500 nW
nNo frequency compensation required
nProgrammable electrical characteristics
nOffset voltage nulling capability
nCan be powered by two flashlight batteries
nShort circuit protection
Connection Diagrams
Metal Can Package
DS009300-2
Top View
Dual-In-Line Package
DS009300-5
Top View
X5 Difference Amplifier
DS009300-3
Quiescent PD= 0.6 mW
500 Nano-Watt X10 Amplifier
DS009300-4
Quiescent PD= 500 nW
August 2000
LM4250 Programmable Operational Amplifier
© 2000 National Semiconductor Corporation DS009300 www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
(Note 3)
LM4250 LM4250C
Supply Voltage ±18V ±18V
Operating Temp. Range −55˚C ≤T
A
≤+125˚C 0˚C ≤T
A
≤+70˚C
Differential Input Voltage ±30V ±30V
Input Voltage (Note 2) ±15V ±15V
I
SET
Current 150 nA 150 nA
Output Short Circuit Duration Continuous Continuous
T
JMAX
H-Package 150˚C 100˚C
N-Package 100˚C
J-Package 150˚C 100˚C
M-Package 100˚C
Power Dissipation at T
A
= 25˚C
H-Package (Still Air) 500 mW 300 mW
(400 LF/Min Air Flow) 1200 mW 1200 mW
N-Package 500 mW
J-Package 1000 mW 600 mW
M-Package 350 mW
Thermal Resistance (Typical) θ
JA
H-Package (Still Air) 165˚C/W 165˚C/W
(400 LF/Min Air Flow) 65˚C/W 65˚C/W
N-Package 130˚C/W
J-Package 108˚C/W 108˚C/W
M-Package 190˚C/W
(Typical) θ
JC
H-Package 21˚C/W 21˚C/W
Storage Temperature Range −65˚C to +150˚C −65˚C to +150˚C
Soldering Information
Dual-In-Line Package
Soldering (10 seconds) 260˚C
Small Outline Package
Vapor Phase (60 seconds) 215˚C
Infrared (15 seconds) 220˚C
See AN-450 “Surface Mounting Methods and Their Effect
on Product Reliability” for other methods of soldering
surface mount devices.
ESD tolerance (Note 4) 800V
Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage
to the device may occur. Operating Ratings indicate conditions for which the
device is functional, but do not guarantee specific performance limits.
Note 2: For supply voltages less than ±15V, the absolute maximum input
voltage is equal to the supply voltage.
Note 3: Refer to RETS4250X for military specifications.
Note 4: Human body model, 1.5 kΩin series with 100 pF.
LM4250
www.national.com 2
Resistor Biasing
Set Current Setting Resistor to V
−
I
SET
V
S
0.1 µA 0.5 µA 1.0 µA 5 µA 10 µA
±1.5V 25.6 MΩ5.04 MΩ2.5 MΩ492 kΩ244 kΩ
±3.0V 55.6 MΩ11.0 MΩ5.5 MΩ1.09 MΩ544 kΩ
±6.0V 116 MΩ23.0 MΩ11.5 MΩ2.29 MΩ1.14 MΩ
±9.0V 176 MΩ35.0 MΩ17.5 MΩ3.49 MΩ1.74 MΩ
±12.0V 236 MΩ47.0 MΩ23.5 MΩ4.69 MΩ2.34 MΩ
±15.0V 296 MΩ59.0 MΩ29.5 MΩ5.89 MΩ2.94 MΩ
Electrical Characteristics
LM4250 (−55˚C ≤T
A
≤+125˚C unless otherwise specified.) T
A
=T
J
V
S
=±
1.5V
Parameter Conditions I
SET
= 1 µA I
SET
=10µA
Min Max Min Max
V
OS
R
S
≤100 kΩ,T
A
= 25˚C 3 mV 5 mV
I
OS
T
A
= 25˚C 3 nA 10 nA
I
bias
T
A
= 25˚C 7.5 nA 50 nA
Large Signal Voltage R
L
= 100 kΩ,T
A
= 25˚C 40k
Gain V
O
=±0.6V, R
L
=10kΩ50k
Supply Current T
A
= 25˚C 7.5 µA 80 µA
Power Consumption T
A
= 25˚C 23 µW 240 µW
V
OS
R
S
≤100 kΩ4mV 6mV
I
OS
T
A
= +125˚C 5 nA 10 nA
T
A
= −55˚C 3 nA 10 nA
I
bias
7.5 nA 50 nA
Input Voltage Range ±0.6V ±0.6V
Large Signal Voltage Gain V
O
=±0.5V, R
L
= 100 kΩ30k
R
L
=10kΩ30k
Output Voltage Swing R
L
= 100 kΩ±0.6V
R
L
=10kΩ±
0.6V
Common Mode Rejection Ratio R
S
≤10 kΩ70 dB 70 dB
Supply Voltage Rejection Ratio R
S
≤10 kΩ76 dB 76 dB
Supply Current 8µA 90µA
V
S
=±
15V
Parameter Conditions I
SET
= 1 µA I
SET
=10µA
Min Max Min Max
V
OS
R
S
≤100 kΩ,T
A
= 25˚C 3 mV 5 mV
I
OS
T
A
= 25˚C 3 nA 10 nA
I
bias
T
A
= 25˚C 7.5 nA 50 nA
Large Signal Voltage R
L
= 100 kΩ,T
A
= 25˚C 100k
Gain V
O
=±10V, R
L
=10kΩ100k
Supply Current T
A
= 25˚C 10 µA 90 µA
Power Consumption T
A
= 25˚C 300 µW 2.7 mW
V
OS
R
S
≤100 kΩ4mV 6mV
I
OS
T
A
= +125˚C 25 nA 25 nA
T
A
= −55˚C 3 nA 10 nA
I
bias
7.5 nA 50 nA
Input Voltage Range ±13.5V ±13.5V
LM4250
www.national.com3
Electrical Characteristics (Continued)
V
S
=±15V
Parameter Conditions I
SET
= 1 µA I
SET
=10µA
Min Max Min Max
Large Signal Voltage V
O
=±10V, R
L
= 100 kΩ50k
Gain R
L
=10kΩ50k
Output Voltage Swing R
L
= 100 kΩ±12V
R
L
=10kΩ±
12V
Common Mode Rejection Ratio R
S
≤10 kΩ70 dB 70 dB
Supply Voltage Rejection Ratio R
S
≤10 kΩ76 dB 76 dB
Supply Current 11 µA 100 µA
Power Consumption 330 µW 3 mW
Electrical Characteristics
LM4250C (0˚C ≤T
A
≤+70˚C unless otherwise specified.) T
A
=T
J
V
S
=±
1.5V
Parameter Conditions I
SET
= 1 µA I
SET
=10µA
Min Max Min Max
V
OS
R
S
≤100 kΩ,T
A
= 25˚C 5 mV 6 mV
I
OS
T
A
= 25˚C 6 nA 20 nA
I
bias
T
A
= 25˚C 10 nA 75 nA
Large Signal Voltage Gain R
L
= 100 kΩ,T
A
= 25˚C 25k
V
O
=±0.6V, R
L
=10kΩ25k
Supply Current T
A
= 25˚C 8 µA 90 µA
Power Consumption T
A
= 25˚C 24 µW 270 µW
V
OS
R
S
≤10 kΩ6.5 mV 7.5 mV
I
OS
8nA 25nA
I
bias
10 nA 80 nA
Input Voltage Range ±0.6V ±0.6V
Large Signal Voltage V
O
=±0.5V, R
L
= 100 kΩ25k
Gain R
L
=10kΩ25k
Output Voltage Swing R
L
= 100 kΩ±0.6V
R
L
=10kΩ±
0.6V
Common Mode Rejection Ratio R
S
≤10 kΩ70 dB 70 dB
Supply Voltage Rejection Ratio R
S
≤10 kΩ74 dB 74 dB
Supply Current 8µA 90µA
Power Consumption 24 µW 270 µW
V
S
=±15V
Parameter Conditions I
SET
= 1 µA I
SET
=10µA
Min Max Min Max
V
OS
R
S
≤100 kΩ,T
A
= 25˚C 5 mV 6 mV
I
OS
T
A
= 25˚C 6 nA 20 nA
I
bias
T
A
= 25˚C 10 nA 75 nA
Large Signal Voltage R
L
= 100 kΩ,T
A
= 25˚C 60k
Gain V
O
=±10V, R
L
=10kΩ60k
Supply Current T
A
= 25˚C 11 µA 100 µA
Power Consumption T
A
= 25˚C 330 µW 3 mW
V
OS
R
S
≤100 kΩ6.5 mV 7.5 mV
I
OS
8nA 25nA
I
bias
10 nA 80 nA
LM4250
www.national.com 4
Electrical Characteristics (Continued)
V
S
=±15V
Parameter Conditions I
SET
= 1 µA I
SET
=10µA
Min Max Min Max
Input Voltage Range ±13.5V ±13.5V
Large Signal Voltage V
O
=±10V, R
L
= 100 kΩ50k
Gain R
L
=10kΩ50k
Output Voltage Swing R
L
= 100 kΩ±12V
R
L
=10kΩ±
12V
Common Mode Rejection Ratio R
S
≤10 kΩ70 dB 70 dB
Supply Voltage Rejection Ratio R
S
≤10 kΩ74 dB 74 dB
Supply Current 11 µA 100 µA
Power Consumption 330 µW 3 mW
Typical Performance Characteristics
Input Bias Current vs I
SET
DS009300-15
Input Bias Current vs
Temperature
DS009300-16
Input Offset Current vs
Temperature
DS009300-17
Unnulled Input Offset Voltage
Change vs I
SET
DS009300-18
Unnulled Input Offset Voltage
Change vs Temperature
DS009300-19
Peak to Peak Output Voltage
Swing vs Load Resistance
DS009300-20
LM4250
www.national.com5
Typical Performance Characteristics (Continued)
Peak to Peak Output Voltage
Swing vs Supply Voltage
DS009300-21
Quiescent Current (I
q
)vs
Temperature
DS009300-22
Quiescent Current (I
q
)vsI
SET
DS009300-23
Slew Rate vs I
SET
DS009300-24
Gain Bandwidth Product
vs I
SET
DS009300-25
Open Loop Voltage Gain
vs I
SET
DS009300-26
Phase Margin vs I
SET
DS009300-27
Input Noise Current (I
n
) and
Voltage (E
n
) vs Frequency
DS009300-28
R
SET
vs I
SET
DS009300-29
LM4250
www.national.com 6
Typical Applications
X5 Difference Amplifier
DS009300-3
Quiescent PD= 0.6 mW
500 Nano-Watt X10 Amplifier
DS009300-4
Quiescent PD= 500 nW
Floating Input Meter Amplifier
100 nA full Scale
DS009300-8
Quiescent PD= 1.8 µW
*Meter movement (0–100 µA, 2 kΩ) marked for 0–100 nA full scale.
LM4250
www.national.com7
Typical Applications (Continued)
X100 Instrumentation Amplifier 10 µW
DS009300-9
Note 5: Quiescent PD=10µW.
Note 6: R2, R3, R4, R5, R6 and R7 are 1% resistors.
Note 7: R11 and C1 are for DC and AC common mode rejection adjustments.
R
SET
Connected to V
−
DS009300-10
R
SET
Connected to Ground
DS009300-11
DS009300-30
Transistor Current Sourcing
Biasing
DS009300-12
*R1 limits ISET maximum
FET Current Sourcing Biasing
DS009300-13
Offset Null Circuit
DS009300-14
LM4250
www.national.com 8
Schematic Diagram
Ordering Information
Temperature Range Package NSC
Military Commercial Package
−55˚C ≤T
A
≤+125˚C 0˚C ≤T
A
≤+70˚C Number
LM4250CN 8-Pin N08E
Molded DIP
LM4250CM 8-Pin M08A
LM4250CMX Surface Mount
8-Pin J08E
LM4250J-MIL Ceramic DIP
LM4250CH 8-Pin H08C
Metal Can
DS009300-1
LM4250
www.national.com9
Physical Dimensions inches (millimeters) unless otherwise noted
Metal Can Package (H)
Order Number LM4250CH
NS Package Number H08C
Ceramic Dual-In-Line Package (J)
Order Number LM4250J-MIL
NS Package Number J08A
LM4250
www.national.com 10
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Small Outline Package (M)
Order Number LM4250CM or LM4250CMX
NS Package Number M08A
Molded Dual-In-Line Package (N)
Order Number LM4250CN
NS Package Number N08E
LM4250
www.national.com11
Notes
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NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
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Tel: 1-800-272-9959
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www.national.com
LM4250 Programmable Operational Amplifier
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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