LMC6462 Dual/LMC6464 Quad
Micropower, Rail-to-Rail Input and Output CMOS
Operational Amplifier
General Description
The LMC6462/4 is a micropower version of the popular
LMC6482/4, combining Rail-to-Rail Input and Output Range
with very low power consumption.
The LMC6462/4 provides an input common-mode voltage
range that exceeds both rails. The rail-to-rail output swing of
the amplifier, guaranteed for loads down to 25 k
, assures
maximum dynamic sigal range. This rail-to-rail performance
of the amplifier, combined with its high voltage gain makes it
unique among rail-to-rail amplifiers. The LMC6462/4 is an
excellent upgrade for circuits using limited common-mode
range amplifiers.
The LMC6462/4, with guaranteed specifications at 3V and
5V, is especially well-suited for low voltage applications. A
quiescent power consumption of 60 W per amplifier (at V
S
= 3V) can extend the useful life of battery operated systems.
The amplifier's 150 fA input current, low offset voltage of
0.25 mV, and 85 dB CMRR maintain accuracy in
battery-powered systems.
Features
(Typical unless otherwise noted)
n
Ultra Low Supply Current
20 A/Amplifier
n
Guaranteed Characteristics at 3V and 5V
n
Rail-to-Rail Input Common-Mode Voltage Range
n
Rail-to-Rail Output Swing
(within 10 mV of rail, V
S
= 5V and R
L
= 25 k
)
n
Low Input Current
150 fA
n
Low Input Offset Voltage
0.25 mV
Applications
n
Battery Operated Circuits
n
Transducer Interface Circuits
n
Portable Communication Devices
n
Medical Applications
n
Battery Monitoring
8-Pin DIP/SO
DS012051-1
Top View
14-Pin DIP/SO
DS012051-2
Top View
Low-Power Two-Op-Amp Instrumentation Amplifier
DS012051-21
August 2000
LMC6462
Dual/LMC6464
Quad
Micropower
,
Rail-to-Rail
Input
and
Output
CMOS
Operational
Amplifier
2000 National Semiconductor Corporation
DS012051
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)
2.0 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 Temp. (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
LMC6462AM, LMC6464AM
-55C
T
J
+125C
LMC6462AI, LMC6464AI
-40C
T
J
+85C
LMC6462BI, LMC6464BI
-40C
T
J
+85C
Thermal Resistance (
JA
)
N Package, 8-Pin Molded DIP
115C/W
M Package, 8-Pin Surface Mount
193C/W
N Package, 14-Pin Molded DIP
81C/W
M Package, 14-Pin
Surface Mount
126C/W
5V 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.
LMC6462AI
LMC6462BI
LMC6462AM
Symbol
Parameter
Conditions
Typ
LMC6464AI
LMC6464BI
LMC6464AM
Units
(Note 5)
Limit
Limit
Limit
(Note 6)
(Note 6)
(Note 6)
V
OS
Input Offset Voltage
0.25
0.5
3.0
0.5
mV
1.2
3.7
1.5
max
TCV
OS
Input Offset Voltage
1.5
V/C
Average Drift
I
B
Input Current
(Note 13)
0.15
10
10
200
pA max
I
OS
Input Offset Current
(Note 13)
0.075
5
5
100
pA max
C
IN
Common-Mode
3
pF
Input Capacitance
R
IN
Input Resistance
>
10
Tera
CMRR
Common Mode
0V
V
CM
15.0V,
85
70
65
70
dB
min
Rejection Ratio
V
+
= 15V
67
62
65
0V
V
CM
5.0V
85
70
65
70
V
+
= 5V
67
62
65
+PSRR
Positive Power Supply
5V
V
+
15V,
85
70
65
70
dB
Rejection Ratio
V
-
= 0V, V
O
= 2.5V
67
62
65
min
-PSRR
Negative Power Supply
-5V
V
-
-15V,
85
70
65
70
dB
Rejection Ratio
V
+
= 0V, V
O
= -2.5V
67
62
65
min
V
CM
Input Common-Mode
V
+
= 5V
-0.2
-0.10
-0.10
-0.10
V
Voltage Range
For CMRR
50 dB
0.00
0.00
0.00
max
5.30
5.25
5.25
5.25
V
5.00
5.00
5.00
min
V
+
= 15V
-0.2
-0.15
-0.15
-0.15
V
For CMRR
50 dB
0.00
0.00
0.00
max
15.30
15.25
15.25
15.25
V
15.00
15.00
15.00
min
LMC6462
Dual/LMC6464
Quad
www.national.com
2
5V 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.
LMC6462AI
LMC6462BI
LMC6462AM
Symbol
Parameter
Conditions
Typ
LMC6464AI
LMC6464BI
LMC6464AM
Units
(Note 5)
Limit
Limit
Limit
(Note 6)
(Note 6)
(Note 6)
A
V
Large Signal
R
L
= 100 k
Sourcing
3000
V/mV
Voltage Gain
(Note 7)
min
Sinking
400
V/mV
min
R
L
= 25 k
Sourcing
2500
V/mV
(Note 7)
min
Sinking
200
V/mV
min
V
O
Output Swing
V
+
= 5V
4.995
4.990
4.950
4.990
V
R
L
= 100 k
to V
+
/2
4.980
4.925
4.970
min
0.005
0.010
0.050
0.010
V
0.020
0.075
0.030
max
V
+
= 5V
4.990
4.975
4.950
4.975
V
R
L
= 25 k
to V
+
/2
4.965
4.850
4.955
min
0.010
0.020
0.050
0.020
V
0.035
0.150
0.045
max
V
+
= 15V
14.990
14.975
14.950
14.975
V
R
L
= 100 k
to V
+
/2
14.965
14.925
14.955
min
0.010
0.025
0.050
0.025
V
0.035
0.075
0.050
max
V
+
= 15V
14.965
14.900
14.850
14.900
V
R
L
= 25 k
to V
+
/2
14.850
14.800
14.800
min
0.025
0.050
0.100
0.050
V
0.150
0.200
0.200
max
I
SC
Output Short Circuit
Sourcing, V
O
= 0V
27
19
19
19
mA
Current
15
15
15
min
V+ = 5V
Sinking, V
O
= 5V
27
22
22
22
mA
17
17
17
min
I
SC
Output Short Circuit
Sourcing, V
O
= 0V
38
24
24
24
mA
Current
17
17
17
min
V
+
= 15V
Sinking, V
O
= 12V
75
55
55
55
mA
(Note 8)
45
45
45
min
I
S
Supply Current
Dual, LMC6462
40
55
55
55
A
V
+
= +5V, V
O
= V
+
/2
70
70
75
max
Quad, LMC6464
80
110
110
110
A
V
+
= +5V, V
O
= V
+
/2
140
140
150
max
Dual, LMC6462
50
60
60
60
A
V
+
= +15V, V
O
= V
+
/2
70
70
75
max
Quad, LMC6464
90
120
120
120
A
V
+
= +15V, V
O
= V
+
/2
140
140
150
max
LMC6462
Dual/LMC6464
Quad
www.national.com
3
5V 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.
LMC6462AI
LMC6462BI
LMC6462AM
Symbol
Parameter
Conditions
Typ
LMC6464AI
LMC6464BI
LMC6464AM
Units
(Note 5)
Limit
Limit
Limit
(Note 6)
(Note 6)
(Note 6)
SR
Slew Rate
(Note 9)
28
15
15
15
V/ms
8
8
8
min
GBW
Gain-Bandwidth Product
V
+
= 15V
50
kHz
m
Phase Margin
50
Deg
G
m
Gain Margin
15
dB
Amp-to-Amp Isolation
(Note 10)
130
dB
e
n
Input-Referred
f = 1 kHz
80
Voltage Noise
V
CM
= 1V
i
n
Input-Referred
f = 1 kHz
0.03
Current Noise
3V 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. Boldface
limits apply at the temperature extremes.
LMC6462AI
LMC6462BI
LMC6462AM
Symbol
Parameter
Conditions
Typ
LMC6464AI
LMC6464BI
LMC6464AM
Units
(Note 5)
Limit
Limit
Limit
(Note 6)
(Note 6)
(Note 6)
V
OS
Input Offset Voltage
0.9
2.0
3.0
2.0
mV
2.7
3.7
3.0
max
TCV
OS
Input Offset Voltage
2.0
V/C
Average Drift
I
B
Input Current
(Note 13)
0.15
10
10
200
pA
I
OS
Input Offset Current
(Note 13)
0.075
5
5
100
pA
CMRR
Common Mode
0V
V
CM
3V
74
60
60
60
dB
Rejection Ratio
min
PSRR
Power Supply
3V
V
+
15V, V
-
= 0V
80
60
60
60
dB
Rejection Ratio
min
V
CM
Input Common-Mode
For CMRR
50 dB
-0.10
0.0
0.0
0.0
V
Voltage Range
max
3.0
3.0
3.0
3.0
V
min
V
O
Output Swing
R
L
= 25 k
to V
+
/2
2.95
2.9
2.9
2.9
V
min
0.15
0.1
0.1
0.1
V
max
I
S
Supply Current
Dual, LMC6462
40
55
55
55
A
V
O
= V
+
/2
70
70
70
Quad, LMC6464
80
110
110
110
A
V
O
= V
+
/2
140
140
140
max
LMC6462
Dual/LMC6464
Quad
www.national.com
4
3V AC Electrical Characteristics
Unless otherwise specified, V
+
= 3V, V
-
= 0V, V
CM
= V
O
= V
+
/2 and R
L
>
1M. Boldface limits apply at the temperature ex-
tremes.
LMC6462AI
LMC6462BI
LMC6462AM
Symbol
Parameter
Conditions
Typ
LMC6464AI
LMC6464BI
LMC6464AM
Units
(Note 5)
Limit
Limit
Limit
(Note 6)
(Note 6)
(Note 6)
SR
Slew Rate
(Note 11)
23
V/ms
GBW
Gain-Bandwidth Product
50
kHz
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 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 2 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 maxi-
mum 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 Range parameters see RETSMC6462/4X.
Typical Performance Characteristics
V
S
= +5V, Single Supply, T
A
= 25C unless otherwise specified
Supply Current vs
Supply Voltage
DS012051-30
Sourcing Current vs
Output Voltage
DS012051-31
Sourcing Current vs
Output Voltage
DS012051-32
Sourcing Current vs
Output Voltage
DS012051-33
Sinking Current vs
Output Voltage
DS012051-34
Sinking Current vs
Output Voltage
DS012051-35
LMC6462
Dual/LMC6464
Quad
www.national.com
5
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