LMC6482
CMOS Dual Rail-To-Rail Input and Output Operational
Amplifier
General Description
The LMC6482 provides a common-mode range that extends
to both supply rails. This rail-to-rail performance combined
with excellent accuracy, due to a high CMRR, makes it
unique among rail-to-rail input amplifiers.
It is ideal for systems, such as data acquisition, that require
a large input signal range. The LMC6482 is also an excellent
upgrade for circuits using limited common-mode range am-
plifiers such as the TLC272 and TLC277.
Maximum dynamic signal range is assured in low voltage
and single supply systems by the LMC6482's rail-to-rail out-
put swing. The LMC6482's rail-to-rail output swing is guar-
anteed for loads down to 600
.
Guaranteed low voltage characteristics and low power dis-
sipation make the LMC6482 especially well-suited for
battery-operated systems.
LMC6482 is also available in MSOP package which is al-
most half the size of a SO-8 device.
See the LMC6484 data sheet for a Quad CMOS operational
amplifier with these same features.
Features
(Typical unless otherwise noted)
n
Rail-to-Rail Input Common-Mode Voltage Range
(Guaranteed Over Temperature)
n
Rail-to-Rail Output Swing (within 20 mV of supply rail,
100 k
load)
n
Guaranteed 3V, 5V and 15V Performance
n
Excellent CMRR and PSRR:
82 dB
n
Ultra Low Input Current:
20 fA
n
High Voltage Gain (R
L
= 500 k
):
130 dB
n
Specified for 2 k
and 600
loads
n
Available in MSOP Package
Applications
n
Data Acquisition Systems
n
Transducer Amplifiers
n
Hand-held Analytic Instruments
n
Medical Instrumentation
n
Active Filter, Peak Detector, Sample and Hold, pH
Meter, Current Source
n
Improved Replacement for TLC272, TLC277
3V Single Supply Buffer Circuit
Connection Diagram
Rail-To-Rail Input
DS011713-1
DS011713-2
Rail-To-Rail Output
DS011713-3
DS011713-4
August 2000
LMC6482
CMOS
Dual
Rail-T
o-Rail
Input
and
Output
Operational
Amplifier
2001 National Semiconductor Corporation
DS011713
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.
ESD Tolerance (Note 2)
1.5 kV
Differential Input Voltage
Supply Voltage
Voltage at Input/Output Pin
(V
+
) +0.3V, (V
-
) -0.3V
Supply Voltage (V
+
- V
-
)
16V
Current at Input Pin (Note 12)
5 mA
Current at Output Pin
(Notes 3, 8)
30 mA
Current at Power Supply Pin
40 mA
Lead Temperature
(Soldering, 10 sec.)
260C
Storage Temperature Range
-65C to +150C
Junction Temperature (Note 4)
150C
Operating Ratings
(Note 1)
Supply Voltage
3.0V
V+
15.5V
Junction Temperature Range
LMC6482AM
-55C
T
J
+125C
LMC6482AI, LMC6482I
-40C
T
J
+85C
Thermal Resistance (
JA
)
N Package, 8-Pin Molded DIP
90C/W
M Package, 8-Pin Surface Mount
155C/W
MSOP package, 8-Pin Mini SO
194C/W
DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 5V, V
-
= 0V, V
CM
= V
O
= V
+
/2 and R
L
>
1M. Boldface
limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Typ
(Note 5)
LMC6482AI
LMC6482I
LMC6482M
Units
Limit
Limit
Limit
(Note 6)
(Note 6)
(Note 6)
V
OS
Input Offset Voltage
0.11
0.750
3.0
3.0
mV
1.35
3.7
3.8
max
TCV
OS
Input Offset Voltage
1.0
V/C
Average Drift
I
B
Input Current
(Note 13)
0.02
4.0
4.0
10.0
pA
max
I
OS
Input Offset Current
(Note 13)
0.01
2.0
2.0
5.0
pA
max
C
IN
Common-Mode
3
pF
Input Capacitance
R
IN
Input Resistance
>
10
Tera
CMRR
Common Mode
0V
V
CM
15.0V
82
70
65
65
dB
min
Rejection Ratio
V
+
= 15V
67
62
60
0V
V
CM
5.0V
82
70
65
65
V
+
= 5V
67
62
60
+PSRR
Positive Power Supply
5V
V
+
15V, V
-
= 0V
82
70
65
65
dB
Rejection Ratio
V
O
= 2.5V
67
62
60
min
-PSRR
Negative Power Supply
-5V
V
-
-15V, V
+
= 0V
82
70
65
65
dB
Rejection Ratio
V
O
= -2.5V
67
62
60
min
V
CM
Input Common-Mode
V
+
= 5V and 15V
V
-
- 0.3
- 0.25
- 0.25
- 0.25
V
Voltage Range
For CMRR
50 dB
0
0
0
max
V
+
+ 0.3V
V
+
+ 0.25
V
+
+ 0.25
V
+
+ 0.25
V
V
+
V
+
V
+
min
A
V
Large Signal
R
L
= 2 k
Sourcing
666
140
120
120
V/mV
Voltage Gain
(Notes 7, 13)
84
72
60
min
Sinking
75
35
35
35
V/mV
20
20
18
min
R
L
= 600
Sourcing
300
80
50
50
V/mV
(Notes 7, 13)
48
30
25
min
Sinking
35
20
15
15
V/mV
13
10
8
min
LMC6482
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2
DC Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 5V, V
-
= 0V, V
CM
= V
O
= V
+
/2 and R
L
>
1M. Boldface
limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Typ
(Note 5)
LMC6482AI
LMC6482I
LMC6482M
Units
Limit
Limit
Limit
(Note 6)
(Note 6)
(Note 6)
V
O
Output Swing
V
+
= 5V
4.9
4.8
4.8
4.8
V
R
L
= 2 k
to V
+
/2
4.7
4.7
4.7
min
0.1
0.18
0.18
0.18
V
0.24
0.24
0.24
max
V
+
= 5V
4.7
4.5
4.5
4.5
V
R
L
= 600
to V
+
/2
4.24
4.24
4.24
min
0.3
0.5
0.5
0.5
V
0.65
0.65
0.65
max
V
+
= 15V
14.7
14.4
14.4
14.4
V
R
L
= 2 k
to V
+
/2
14.2
14.2
14.2
min
0.16
0.32
0.32
0.32
V
0.45
0.45
0.45
max
V
+
= 15V
14.1
13.4
13.4
13.4
V
R
L
= 600
to V
+
/2
13.0
13.0
13.0
min
0.5
1.0
1.0
1.0
V
1.3
1.3
1.3
max
I
SC
Output Short Circuit
Sourcing, V
O
= 0V
20
16
16
16
mA
Current
12
12
10
min
V
+
= 5V
Sinking, V
O
= 5V
15
11
11
11
mA
9.5
9.5
8.0
min
I
SC
Output Short Circuit
Sourcing, V
O
= 0V
30
28
28
28
mA
Current
22
22
20
min
V
+
= 15V
Sinking, V
O
= 12V
30
30
30
30
mA
(Note 8)
24
24
22
min
I
S
Supply Current
Both Amplifiers
1.0
1.4
1.4
1.4
mA
V
+
= +5V, V
O
= V
+
/2
1.8
1.8
1.9
max
Both Amplifiers
1.3
1.6
1.6
1.6
mA
V
+
= 15V, V
O
= V
+
/2
1.9
1.9
2.0
max
AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 5V, V
-
= 0V, V
CM
= V
O
= V
+
/2, and R
L
>
1M. Boldface
limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Typ
(Note 5)
LMC6482AI
LMC6482I
LMC6482M
Units
Limit
Limit
Limit
(Note 6)
(Note 6)
(Note 6)
SR
Slew Rate
(Note 9)
1.3
1.0
0.9
0.9
V/s
0.7
0.63
0.54
min
GBW
Gain-Bandwidth Product
V
+
= 15V
1.5
MHz
m
Phase Margin
50
Deg
G
m
Gain Margin
15
dB
Amp-to-Amp Isolation
(Note 10)
150
dB
e
n
Input-Referred
F = 1 kHz
37
nV/
Hz
Voltage Noise
V
cm
= 1V
LMC6482
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3
AC Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 5V, V
-
= 0V, V
CM
= V
O
= V
+
/2, and R
L
>
1M. Boldface
limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Typ
(Note 5)
LMC6482AI
LMC6482I
LMC6482M
Units
Limit
Limit
Limit
(Note 6)
(Note 6)
(Note 6)
i
n
Input-Referred
F = 1 kHz
0.03
pA/
Hz
Current Noise
T.H.D.
Total Harmonic Distortion
F = 10 kHz, A
V
= -2
%
R
L
= 10 k
, V
O
= 4.1 V
PP
0.01
F = 10 kHz, A
V
= -2
R
L
= 10 k
, V
O
= 8.5 V
PP
0.01
%
V
+
= 10V
DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 3V, V
-
= 0V, V
CM
= V
O
= V
+
/2 and R
L
>
1M.
Symbol
Parameter
Conditions
Typ
(Note 5)
LMC6482AI
LMC6482I
LMC6482M
Units
Limit
Limit
Limit
(Note 6)
(Note 6)
(Note 6)
V
OS
Input Offset Voltage
0.9
2.0
3.0
3.0
mV
2.7
3.7
3.8
max
TCV
OS
Input Offset Voltage
2.0
V/C
Average Drift
I
B
Input Bias Current
0.02
pA
I
OS
Input Offset Current
0.01
pA
CMRR
Common Mode
0V
V
CM
3V
74
64
60
60
dB
Rejection Ratio
min
PSRR
Power Supply
3V
V
+
15V, V
-
= 0V
80
68
60
60
dB
Rejection Ratio
min
V
CM
Input Common-Mode
For CMRR
50 dB
V
-
-0.25
0
0
0
V
Voltage Range
max
V
+
+ 0.25
V
+
V
+
V
+
V
min
V
O
Output Swing
R
L
= 2 k
to V
+
/2
2.8
V
0.2
V
R
L
= 600
to V
+
/2
2.7
2.5
2.5
2.5
V
min
0.37
0.6
0.6
0.6
V
max
I
S
Supply Current
Both Amplifiers
0.825
1.2
1.2
1.2
mA
1.5
1.5
1.6
max
AC Electrical Characteristics
Unless otherwise specified, V
+
= 3V, V
-
= 0V, V
CM
= V
O
= V
+
/2, and R
L
>
1M.
Symbol
Parameter
Conditions
Typ
(Note 5)
LMC6482AI
LMC6482I
LMC6482M
Units
Limit
Limit
Limit
(Note 6)
(Note 6)
(Note 6)
SR
Slew Rate
(Note 11)
0.9
V/s
GBW
Gain-Bandwidth Product
1.0
MHz
T.H.D.
Total Harmonic Distortion
F = 10 kHz, A
V
= -2
0.01
%
R
L
= 10 k
, V
O
= 2 V
PP
LMC6482
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4
AC Electrical Characteristics
(Continued)
Note 1: Absolute Maximum Ratings indicate limts beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 2: Human body model, 1.5 k
in series with 100 pF. All pins rated per method 3015.6 of MIL-STD-883. This is a Class 1 device rating.
Note 3: 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 4: 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
. All numbers apply for packages soldered directly into a PC board.
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, 3.5V
V
O
7.5V.
Note 8: Do not short circuit output to V
+
, when V
+
is greater than 13V or reliability will be adversely affected.
Note 9: V
+
= 15V. Connected as Voltage Follower with 10V step input. Number specified is the slower of either the positive or negative slew rates.
Note 10: Input referred, V
+
= 15V and R
L
= 100 k
connected to 7.5V. Each amp excited in turn with 1 kHz to produce V
O
= 12 V
PP
.
Note 11: Connected as voltage Follower with 2V step input. Number specified is the slower of either the positive or negative slew rates.
Note 12: Limiting input pin current is only necessary for input voltages that exceed absolute maximum input voltage ratings.
Note 13: Guaranteed limits are dictated by tester limitations and not device performance. Actual performance is reflected in the typical value.
Note 14: For guaranteed Military Temperature parameters see RETS6482X.
Typical Performance Characteristics
V
S
= +15V, Single Supply, T
A
= 25C unless otherwise
specified
Supply Current vs
Supply Voltage
DS011713-40
Input Current vs
Temperature
DS011713-41
Sourcing Current vs
Output Voltage
DS011713-42
Sourcing Current vs
Output Voltage
DS011713-43
Sourcing Current vs
Output Voltage
DS011713-44
Sinking Current vs
Output Voltage
DS011713-45
LMC6482
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