LMC272
CMOS Dual Low Cost Rail to Rail Output Operational
Amplifier
General Description
The LMC272 is a CMOS dual operational amplifier with
rail-to-rail output swing and an input common voltage range
that extends below the negative supply. Other performance
characteristics include low voltage operation, low bias cur-
rent, excellent channel-to-channel isolation, good bandwidth
performance and a competitive price.
These devices are available in MSOP package which is
about half the size of a SO-8 device. This enables the de-
signer to fit the device in extremely small applications.
The LMC272C is a direct replacement for TLC272C with per-
formance which meets or exceeds the TLC272C's guaran-
teed limits in the commercial temperature range when oper-
ating from a supply of 2.7V to 15V (see Electrical
Characteristics table for details).
These features make this cost effective device ideal for new
designs as well as for upgrading existing designs. Applica-
tions include hand-held analytic instruments, transducer am-
plifiers, sample and hold circuits, etc.
Features
(Typical unless otherwise noted) V
S
= 5V, T
A
= 25C
n
Output Swing to within 60 mV of supply rail (10 k
load)
n
High voltage gain:
90 dB
n
Unity gain-bandwidth:
2.0 MHz
n
Wide supply voltage:
2.7V to 15V
n
Characterized for:
2.7V, 5V, 10V
n
Low supply current:
0.975 mA/amplifier
n
Input voltage range:
-0.3V to 4.2V
Applications
n
Portable instruments
n
Upgrade for TLC272C and TS272C
n
Photodetector preamplifiers
n
D/A converters
n
Filters
Connection Diagram
Ordering Information
Package
Ordering
NSC Drawing
Package
Supplied as
Information
Number
Marking
8-pin Molded DIP
LMC272CN
N08E
LMC272CN
Rails
8-pin SO-8
LMC272CM
M08A
LMC272CM
Rails
LMC272CMX
M08A
LMC272CM
2.5k Tape and Reel
MSOP
LMC272CMM
MUA08A
A07
Rails
LMC272CMMX
MUA08A
A07
3k Tape and Reel
DS012867-1
Top View
December 1996
LMC272
CMOS
Dual
Low
Cost
Rail
to
Rail
Output
Operational
Amplifier
1999 National Semiconductor Corporation
DS012867
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 kV
Differential Input Voltage
Supply Voltages
Voltage at Input/Output Pin
(V
+
)+0.3V, (V
-
)-0.3V
Supply Voltage (V
+
- V
-
):
16V
Current at Input Pin (Note 10)
5 mA
Current at Output Pin (Note 3)
(Note 7)
30 mA
Lead Temperature
(soldering, 10 sec.)
260C
Storage Temp. Range
-65C to +150C
Junction Temperature (Note 4)
150C
Operating Ratings
(Note 1)
Supply Voltage
2.5V
V
S
15V
Junction Temperature Range
LMC272C
0C
T
J
+70C
Thermal Resistance (
JA
)
N Package, 8-pin Molded DIP
115 C/W
M Package, 8-pin Surface Mount
177 C/W
MSOP Package
235 C/W
2.7V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 2.7V, V
-
= 0V, V
CM
= V
O
= V
+
/2, R
L
to ground, and R
L
>
1 M
. Boldface limits apply at the temperature extremes
Typ
LMC272C
Symbol
Parameter
Conditions
(Note 5)
Limit
Units
(Note 6)
V
OS
Input Offset Voltage
V
O
= 1.4V, R
S
= 50, V
CM
= 0V, R
L
= 10k
1.40
7
mV
9
max
TCV
OS
Temp. Coefficient of
T
A
= 0C to 70C
3.9
V/C
Input Offset Voltage
I
B
Input Bias Current
1
64
pA
max
I
OS
Input Offset Current
0.5
32
pA
max
CMRR
Common Mode
V
CM
= -0.2V to 1.2V
77
65
dB
Rejection Ratio
60
min
PSRR
Power Supply
V+ = 2.7V to 5V, V
O
= 1.4V
75
65
dB
Rejection Ratio
60
min
V
CM
Input Common-Mode
CMRR
50 dB
1.7
1.5
V
Voltage Range
1.2
min
-0.3
-0.2
V
-0.2
max
A
V
Large Signal Voltage
V
O
= 0.25V to 2.45V, R
L
= 10k
88
dB
Gain
V
O
Output Swing
R
L
= 10 k
, V
ID
= 100 mV
2.64
2.55
V
(Note 11)
min
V
ID
= -100 mV
0
20
mV
(Note 11)
25
max
I
SC
Output Short Circuit
Sourcing, V
ID
= 100 mV
3.7
mA
Current
(Note 11)
Sinking, V
ID
= -100 mV
2.5
mA
(Note 11)
I
S
Total Supply Current
1.60
2.5
mA
3.0
max
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2
2.7V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 2.7V, V
-
= 0V, V
CM
= V
O
= V
+
/2, R
L
to ground and R
L
>
1 M
. Boldface limits apply at the temperature extremes
Typ
LMC272C
Symbol
Parameter
Conditions
(Note 5)
Limit
Units
(Note 6)
SR
Slew Rate (Note 8)
A
V
= +1, R
L
= 10 k
,
VI = 1 V
PP
, C
L
= 20 pF
1.7
V/s
(Note 12)
GBW
Unity Gain Frequency
VI = 10 mV
PP
, C
L
= 20 pF
1.9
MHz
(Note 12)
m
Phase Margin
VI = 10 mV
PP
, C
L
= 20 pF
39
Deg
(Note 12)
e
n
Input-Referred
f = 1 kHz, R
S
= 20
27
Voltage Noise
i
n
Input-Referred
f = 1 kHz
0.0015
Current Noise
f
max
Full Power Bandwidth
V
S
= 10V, C
L
= 20 pF, R
L
= 20 k
120
kHz
Amp-to-Amp Isolation
(Note 9)
150
dB
THD
Total Harmonic
A
V
= +1, V
IN
= 0.7V
PP
0.035
%
Distortion
f = 1 kHz
www.national.com
3
5V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 5V, V
-
= 0V, V
CM
= V
O
= V
+
/2, R
L
to ground and R
L
>
1 M
. Boldface limits apply at the temperature extremes
Typ
LMC272C
Symbol
Parameter
Conditions
(Note 5)
Limit
Units
(Note 6)
V
OS
Input Offset Voltage
V
O
= 1.4V, R
S
= 50,
1.75
7
mV
R
L
= 10k, V
CM
= 0V
9
max
TCV
OS
Temp. Coefficient of
T
A
= 0C to 70C
3.3
V/C
Input Offset Voltage
I
B
Input Bias Current
1
64
pA
max
I
OS
Input Offset Current
0.5
32
pA
max
CMRR
Common Mode
V
CM
= -0.2V to 3.5V
77
65
dB
Rejection Ratio
60
min
PSRR
Power Supply
V+ = 5V to 10V, V
O
= 1.4V
88
65
dB
Rejection Ratio
60
min
V
CM
Input Common-Mode
CMRR
50 dB
4.2
4
V
Voltage Range
3.5
min
-0.3
-0.2
V
-0.2
max
A
V
Large Signal Voltage
V
O
= 0.25V to 2V, R
L
= 10k
90
80
dB
Gain
72
min
V
O
Output Swing
R
L
= 10 k
, V
ID
= 100 mV
4.94
4.85
V
(Note 11)
4.75
min
V
ID
= -100 mV
0
20
mV
(Note 11)
25
max
I
SC
Output Short Circuit
Sourcing, V
ID
= 100 mV
16
mA
Current
(Note 11)
Sinking, V
ID
= -100 mV
16
mA
(Note 11)
I
S
1.95
3.2
mA
3.6
max
www.national.com
4
5V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 5V, V
-
= 0V, V
CM
= V
O
= V
+
/2, R
L
to ground and R
L
>
1 M
. Boldface limits apply at the temperature extremes
Typ
LMC272C
Symbol
Parameter
Conditions
(Note 5)
Limit
Units
(Note 6)
SR
Slew Rate (Note 8)
A
V
= +1, R
L
= 10 k
,
V/s
VI = 1 V
PP
, C
L
= 20 pF
2.5
(Note 12)
A
V
= +1, R
L
= 10 k
,
VI = 2.5 V
PP
, C
L
= 20 pF
2.5
(Note 12)
GBW
Unity Gain Frequency
VI = 10 mV, C
L
= 20 pF
2.0
MHz
(Note 12)
m
Phase Margin
VI = 10 mV, C
L
= 20 pF
43
Deg
(Note 12)
e
n
Input-Referred
f = 1 kHz, R
S
= 20
25
Voltage Noise
i
n
Input-Referred
f = 1 kHz
0.0015
Current Noise
f
max
Full Power Bandwidth
V
S
= 10V, C
L
= 20 pF, R
L
= 20 k
120
kHz
Amp-to-Amp Isolation
(Note 9)
150
dB
THD
Total Harmonic
A
V
= +1, V
IN
= 2.5 V
PP
0.015
%
Distortion
f = 1 kHz
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5
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