LMC6081
Precision CMOS Single Operational Amplifier
General Description
The LMC6081 is a precision low offset voltage operational
amplifier, capable of single supply operation. Performance
characteristics include ultra low input bias current, high volt-
age gain, rail-to-rail output swing, and an input common
mode voltage range that includes ground. These features,
plus its low offset voltage, make the LMC6081 ideally suited
for precision circuit applications.
Other applications using the LMC6081 include precision
full-wave
rectifiers,
integrators,
references,
and
sample-and-hold circuits.
This device is built with National's advanced Double-Poly
Silicon-Gate CMOS process.
For designs with more critical power demands, see the
LMC6061 precision micropower operational amplifier.
For a dual or quad operational amplifier with similar features,
see the LMC6082 or LMC6084 respectively.
PATENT PENDING
Features
(Typical unless otherwise stated)
n
Low offset voltage:
150 V
n
Operates from 4.5V to 15V single supply
n
Ultra low input bias current:
10 fA
n
Output swing to within 20 mV of supply rail, 100k load
n
Input common-mode range includes V
-
n
High voltage gain:
130 dB
n
Improved latchup immunity
Applications
n
Instrumentation amplifier
n
Photodiode and infrared detector preamplifier
n
Transducer amplifiers
n
Medical instrumentation
n
D/A converter
n
Charge amplifier for piezoelectric transducers
Connection Diagram
Ordering Information
Package
Temperature Range
NSC
Drawing
Transport
Media
Military
Industrial
-55C to +125C
-40C to +85C
8-Pin
LMC6081AMN
LMC6081AIN
N08E
Rail
Molded DIP
LMC6081IN
8-Pin
LMC6081AIM
M08A
Rail
Small Outline
LMC6081IM
Tape and Reel
8-Pin DIP/SO
DS011423-1
Top View
November 1994
LMC6081
Precision
CMOS
Single
Operational
Amplifier
1999 National Semiconductor Corporation
DS011423
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.
Differential Input Voltage
Supply Voltage
Voltage at Input/Output Pin
(V
+
) +0.3V,
(V
-
) -0.3V
Supply Voltage (V
+
- V
-
)
16V
Output Short Circuit to V
+
(Note 10)
Output Short Circuit to V
-
(Note 2)
Lead Temperature
(Soldering, 10 Sec.)
260C
Storage Temp. Range
-65C to +150C
Junction Temperature
150C
ESD Tolerance (Note 4)
2 kV
Current at Input Pin
10 mA
Current at Output Pin
30 mA
Current at Power Supply Pin
40 mA
Power Dissipation
(Note 3)
Operating Ratings
(Note 1)
Temperature Range
LMC6081AM
-55C
T
J
+125C
LMC6081AI, LMC6081I
-40C
T
J
+85C
Supply Voltage
4.5V
V
+
15.5V
Thermal Resistance (
JA
), (Note 11)
N Package, 8-Pin Molded DIP
115C/W
M Package, 8-Pin Surface Mount
193C/W
Power Dissipation (Note 9)
DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C. Boldface limits apply at the temperature extremes. V
+
= 5V, V
-
= 0V, V
CM
= 1.5V, V
O
= 2.5V and R
L
>
1M unless otherwise specified.
Typ
LMC6081AM
LMC6081AI
LMC6081I
Symbol
Parameter
Conditions
(Note 5)
Limit
Limit
Limit
Units
(Note 6)
(Note 6)
(Note 6)
V
OS
Input Offset Voltage
150
350
350
800
V
1000
800
1300
Max
TCV
OS
Input Offset Voltage
1.0
V/C
Average Drift
I
B
Input Bias Current
0.010
pA
100
4
4
Max
I
OS
Input Offset Current
0.005
pA
100
2
2
Max
R
IN
Input Resistance
>
10
Tera
CMRR
Common Mode
0V
V
CM
12.0V
85
75
75
66
dB
Rejection Ratio
V
+
= 15V
72
72
63
Min
+PSRR
Positive Power Supply
5V
V
+
15V
85
75
75
66
dB
Rejection Ratio
V
O
= 2.5V
72
72
63
Min
-PSRR
Negative Power Supply
0V
V
-
-10V
94
84
84
74
dB
Rejection Ratio
81
81
71
Min
V
CM
Input Common-Mode
V
+
= 5V and 15V
-0.4
-0.1
-0.1
-0.1
V
Voltage Range
for CMRR
60 dB
0
0
0
Max
V
+
- 1.9
V
+
- 2.3
V
+
- 2.3
V
+
- 2.3
V
V
+
- 2.6
V
+
- 2.5
V
+
- 2.5
Min
A
V
Large Signal
R
L
= 2 k
Sourcing
1400
400
400
300
V/mV
Voltage Gain
(Note 7)
300
300
200
Min
Sinking
350
180
180
90
V/mV
70
100
60
Min
R
L
= 600
Sourcing
1200
400
400
200
V/mV
(Note 7)
150
150
80
Min
Sinking
150
100
100
70
V/mV
35
50
35
Min
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2
DC Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C. Boldface limits apply at the temperature extremes. V
+
= 5V, V
-
= 0V, V
CM
= 1.5V, V
O
= 2.5V and R
L
>
1M unless otherwise specified.
Typ
LMC6081AM
LMC6081AI
LMC6081I
Symbol
Parameter
Conditions
(Note 5)
Limit
Limit
Limit
Units
(Note 6)
(Note 6)
(Note 6)
V
O
Output Swing
V
+
= 5V
4.87
4.80
4.80
4.75
V
R
L
= 2 k
to 2.5V
4.70
4.73
4.67
Min
0.10
0.13
0.13
0.20
V
0.19
0.17
0.24
Max
V
+
= 5V
4.61
4.50
4.50
4.40
V
R
L
= 600
to 2.5V
4.24
4.31
4.21
Min
0.30
0.40
0.40
0.50
V
0.63
0.50
0.63
Max
V
+
= 15V
14.63
14.50
14.50
14.37
V
R
L
= 2 k
to 7.5V
14.30
14.34
14.25
Min
0.26
0.35
0.35
0.44
V
0.48
0.45
0.56
Max
V
+
= 15V
13.90
13.35
13.35
12.92
V
R
L
= 600
to 7.5V
12.80
12.86
12.44
Min
0.79
1.16
1.16
1.33
V
1.42
1.32
1.58
Max
I
O
Output Current
Sourcing, V
O
= 0V
22
16
16
13
mA
V
+
= 5V
8
10
8
Min
Sinking, V
O
= 5V
21
16
16
13
mA
11
13
10
Min
I
O
Output Current
Sourcing, V
O
= 0V
30
28
28
23
mA
V
+
= 15V
18
22
18
Min
Sinking, V
O
= 13V
34
28
28
23
mA
(Note 10)
19
22
18
Min
I
S
Supply Current
V
+
= +5V, V
O
= 1.5V
450
750
750
750
A
900
900
900
Max
V
+
= +15V, V
O
= 7.5V
550
850
850
850
A
950
950
950
Max
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3
AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, Boldface limits apply at the temperature extremes. V
+
= 5V, V
-
= 0V, V
CM
= 1.5V, V
O
= 2.5V and R
L
>
1M unless otherwise specified.
Typ
LMC6081AM
LMC6081AI
LMC6081
Symbol
Parameter
Conditions
(Note 5)
Limit
Limit
Limit
Units
(Note 6)
(Note 6)
(Note 6)
SR
Slew Rate
(Note 8)
1.5
0.8
0.8
0.8
V/s
0.5
0.6
0.6
Min
GBW
Gain-Bandwidth Product
1.3
MHz
m
Phase Margin
50
Deg
e
n
Input-Referred
Voltage Noise
F = 1 kHz
22
i
n
Input-Referred
Current Noise
F = 1 kHz
0.0002
T.H.D.
Total Harmonic Distortion
F = 10 kHz, A
V
= -10
R
L
= 2 k
, V
O
= 8 V
PP
0.01
%
5V Supply
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-
tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The
guaranteed specifications apply only for the test conditions listed.
Note 2: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the
maximum allowed junction temperature of 150C. Output currents in excess of
30 mA over long term may adversely affect reliability.
Note 3: The maximum power dissipation is a function of T
J(Max)
,
JA
, and T
A
. The maximum allowable power dissipation at any ambient temperature is P
D
= (T
J(Max)
- T
A
) /
JA
.
Note 4: Human body model, 1.5 k
in series with 100 pF.
Note 5: Typical values represent the most likely parametric norm.
Note 6: All limits are guaranteed by testing or statistical analysis.
Note 7: V
+
= 15V, V
CM
= 7.5V and R
L
connected to 7.5V. For Sourcing tests, 7.5V
V
O
11.5V. For Sinking tests, 2.5V
V
O
7.5V.
Note 8: V
+
= 15V. Connected as Voltage Follower with 10V step input. Number specified is the slower of the positive and negative slew rates.
Note 9: For operating at elevated temperatures the device must be derated based on the thermal resistance
JA
with P
D
= (T
J
- T
A
)/
JA
.
Note 10: Do not connect output to V
+
, when V
+
is greater than 13V or reliability will be adversely affected.
Note 11: All numbers apply for packages soldered directly into a PC board.
Typical Performance Characteristics
V
S
=
7.5V, T
A
= 25C, Unless otherwise specified
Distribution of LMC6081
Input Offset Voltage
(T
A
= +25C)
DS011423-15
Distribution of LMC6081
Input Offset Voltage
(T
A
= -55C)
DS011423-16
Distribution of LMC6081
Input Offset Voltage
(T
A
= +125C)
DS011423-17
www.national.com
4
Typical Performance Characteristics
V
S
=
7.5V, T
A
= 25C, Unless otherwise
specified (Continued)
Input Bias Current
vs Temperature
DS011423-18
Supply Current
vs Supply Voltage
DS011423-19
Input Voltage
vs Output Voltage
DS011423-20
Common Mode
Rejection Ratio
vs Frequency
DS011423-21
Power Supply Rejection
Ratio vs Frequency
DS011423-22
Input Voltage Noise
vs Frequency
DS011423-23
Output Characteristics
Sourcing Current
DS011423-24
Output Characteristics
Sinking Current
DS011423-25
Gain and Phase Response
vs Temperature
(-55C to +125C)
DS011423-26
www.national.com
5
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