LM7131
Tiny High Speed Single Supply Operational Amplifier
General Description
The LM7131 is a high speed bipolar operational amplifier
available in a tiny SOT23-5 package. This makes the
LM7131 ideal for space and weight critical designs. Single
supply voltages of 3V and 5V provides good video perfor-
mance, wide bandwidth, low distortion, and high PSRR and
CMRR. This makes the amplifier an excellent choice for
desktop and portable video and computing applications. The
amplifier is supplied in surface mount 8-pin and tiny
SOT23-5 packages.
Tiny amplifiers are so small they can be placed anywhere on
a board close to the signal source or next to an A-to-D input.
Good high speed performance at low voltage makes the
LM7131 a preferred part for battery powered designs.
Features
n
Tiny SOT23-5 package saves space-typical circuit
layouts take half the space of SO-8 designs.
n
Guaranteed specs at 3V, 5V, and
5V supplies
n
Typical supply current 7.0 mA at 5V, 6.5 mA at 3V
n
4V output swing with +5V single supply
n
Typical total harmonic distortion of 0.1% at 4 MHz
n
70 MHz Gain-Bandwidth Product
n
90 MHz -3 dB bandwidth at 3V and 5V, Gain = +1
n
Designed to drive popular video A/D converters
n
40 mA output can drive 50
loads
n
Differential gain and phase 0.25% and 0.75 at A
V
= +2
Applications
n
Driving video A/D converters
n
Video output for portable computers and PDAs
n
Desktop teleconferencing
n
High fidelity digital audio
n
Video cards
Connection Diagrams
Package
Ordering
NSC Drawing
Package
Supplied as
Information
Number
Marking
8-Pin SO-8
LM7131ACM
M08A
LM7131ACM
rails
8-Pin SO-8
LM7131BCM
M08A
LM7131BCM
rails
8-Pin SO-8
LM7131ACMX
M08A
LM7131ACM
2.5k units tape and reel
8-Pin SO-8
LM7131BCMX
M08A
LM7131BCM
2.5k units tape and reel
5-Pin SOT 23-5
LM7131ACM5
MA05A
A02A
1k units on tape and reel
5-Pin SOT 23-5
LM7131BCM5
MA05A
A02B
1k units on tape and reel
5-Pin SOT 23-5
LM7131ACM5X
MA05A
A02A
3k units tape and reel
5-Pin SOT 23-5
LM7131BCM5X
MA05A
A02B
3k units tape and reel
8-Pin SO-8
DS012313-1
Top View
5-Pin SOT23-5
DS012313-2
Top View
September 1999
LM7131
T
iny
High
Speed
Single
Supply
Operational
Amplifier
1999 National Semiconductor Corporation
DS012313
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)
2000V
Differential Input Voltage
2.0
Voltage at Input/Output Pin
(V
+
)+0.1V, (V
-
) - 0.3V
Supply Voltage (V
+
V
-
)
12V
Current at Input Pin
5 mA
Current at Output Pin (Note 3)
80 mA
Current at Power Supply Pin
80 mA
Lead Temperature
(soldering, 10 sec)
260C
Storage Temperature Range
- 65C to +150C
Junction Temperature (Note 4)
150C
Operating Ratings
Supply Voltage (V
+
V
-
)
2.7V
V
12V
Junction Temperature Range
LM7131AC, LM7131BC
0C
T
J
+ 70C
Thermal Resistance (
JA
)
SO-8 Package, 8-Pin Surface Mount
165C/W
M05A Package, 5-Pin Surface Mount
325C/W
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
= 150
. Bold-
face limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Typ
(Note 5)
LM7131AC
LM7131BC
Units
Limit
Limit
(Note 6)
(Note 6)
V
OS
Input Offset Voltage
0.02
3.5
7
mV
4
10
max
TCV
OS
Input Offset Voltage
10
V/C
Average Drift
I
B
Input Bias Current
20
35
35
A
40
40
max
I
OS
Input Offset Current
0.35
3.5
3.5
A
5
5
max
CMRR
Common Mode
0V
V
CM
0.85V
75
60
60
dB
Rejection Ratio
(Video Levels)
55
55
min
CMRR
Common Mode
0.85V
V
CM
1.7V
70
55
55
dB
Rejection Ratio
(Mid-Range)
50
50
min
+PSRR
Positive Power Supply
V
+
= 3V, V
-
= 0V
75
65
65
dB
Rejection Ratio
V
+
= 3V to 6.5V
60
60
min
-PSRR
Negative Power Supply
V
-
= -3V, V
+
= 0V
75
65
65
dB
Rejection Ratio
V
-
= -3V to -6.5V
60
60
min
V
CM
Input Common-Mode
V
+
= 3V
0.0
0.0
0.0
V
Voltage Range
For CMRR
50 dB
0.00
0.00
min
2.0
1.70
1.70
V
1.60
1.60
max
A
VOL
Voltage Gain
R
L
= 150
, V
O
= 0.250V
60
55
55
dB
to 1.250V
50
50
C
IN
Common-Mode
2
pF
Input Capacitance
V
O
Output Swing
V
+
= 3V, R
L
= 150
2.6
2.3
2.3
V
High
terminated at 0V
2.0
2.0
min
Low
V
+
= 3V, R
L
= 150
0.05
0.15
0.15
V
terminated at 0V
0.20
0.20
max
High
V
+
= 3V, R
L
= 150
2.6
2.3
2.3
V
terminated at 1.5V
2.0
2.0
min
Low
V
+
= 3V, R
L
= 150
0.5
0.8
0.8
V
terminated at 1.5V
1.0
1.0
max
V
O
Output Swing
V
+
= 3V, R
L
= 600
2.73
V
High
terminated at 0V
max
www.national.com
2
3V DC Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 3V, V
-
= 0V, V
CM
= V
O
= V
+
/2 and R
L
= 150
. Bold-
face limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Typ
(Note 5)
LM7131AC
LM7131BC
Units
Limit
Limit
(Note 6)
(Note 6)
V
O
Output Swing
V
+
= 3V, R
L
= 600
0.06
V
Low
terminated at 0V
max
I
SC
Output Short Circuit
Sourcing, V
O
= 0V
65
45
45
mA
Current
40
40
min
Sinking, V
O
= 3V
40
25
25
mA
20
20
min
I
S
Supply Current
V
+
= + 3V
6.5
9.0
9.0
mA
9.5
9.5
max
3V AC 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
= 150
. Bold-
face limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Typ
(Note 5)
LM7131AC
LM7131BC
Units
Limit
Limit
(Note 6)
(Note 6)
T.H.D.
Total Harmonic Distortion
F = 4 MHz, A
V
= + 2
0.1
%
R
L
= 150
, V
O
= 1.0V
PP
Differential Gain
(Note 10)
0.45
%
Differential Phase
(Note 10)
0.6
SR
Slew Rate
R
L
= 150
, C
L
= 5 pF
120
V/S
(Note 7)
SR
Slew Rate
R
L
= 150
, C
L
= 20 pF
100
V/S
(Note 7)
GBW
Gain-Bandwidth Product
70
MHz
Closed-Loop - 3 dB
90
MHz
Bandwidth
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
= 150
. Bold-
face limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Typ
(Note 5)
LM7131AC
LM7131BC
Units
Limit
Limit
(Note 6)
(Note 6)
V
OS
Input Offset Voltage
0.02
3.5
7
mV
4
10
max
TCV
OS
Input Offset Voltage
10
V/C
Average Drift
I
B
Input Bias Current
20
35
35
A
40
40
max
I
OS
Input Offset Current
0.35
3.5
3.5
A
5
5
max
CMRR
Common Mode
0V
V
CM
1.85V
75
65
65
dB
Rejection Ratio
(Video Levels)
60
60
min
CMRR
Common Mode
1.85V
V
CM
3.7V
70
55
55
dB
Rejection Ratio
(Mid-Range)
50
50
min
+ PSRR
Positive Power Supply
V
+
= 5V, V
-
= 0V
75
65
65
dB
www.national.com
3
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
= 150
. Bold-
face limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Typ
(Note 5)
LM7131AC
LM7131BC
Units
Limit
Limit
(Note 6)
(Note 6)
Rejection Ratio
V
+
= 5V to 10V
60
60
min
- PSRR
Negative Power Supply
V
-
= - 5V, V
+
= 0V
75
65
65
dB
Rejection Ratio
V
-
= - 5V to -10V
60
60
min
V
CM
Input Common-Mode
V
+
= 5V
0.0
- 0.0
- 0.0
V
Voltage Range
For CMRR
50 dB
0.00
0.00
min
4.0
3.70
3.70
V
3.60
3.60
max
A
VOL
Voltage Gain
R
L
= 150
, V
O
=
70
60
60
dB
0.250V to 2.250V
55
55
min
C
IN
Common-Mode
2
pF
Input Capacitance
V
O
Output Swing
V
+
= 5V, R
L
= 150
4.5
4.3
4.3
V
High
terminated at 0V
4.0
4.0
min
Low
V
+
= 5V, R
L
= 150
0.08
0.15
0.15
V
terminated at 0V
0.20
0.20
max
High
V
+
= 5V, R
L
= 150
4.5
4.3
4.3
V
terminated at 2.5V
4.0
4.0
min
Low
V
+
= 5V, R
L
= 150
0.5
0.8
0.8
V
terminated at 2.5V
1.0
1.0
max
V
O
Output Swing
V
+
= 5V, R
L
= 600
4.70
V
High
terminated at 0V
max
V
O
Ouptut Swing
V
+
= 5V, R
L
= 600
0.07
V
Low
terminated at 0V
max
I
SC
Output Short Circuit
Sourcing, V
O
= 0V
65
45
45
mA
Current
40
40
min
Sinking, V
O
= 5V
40
25
25
mA
20
20
min
I
S
Supply Current
V
+
= +5V
7.0
9.5
9.5
mA
10.0
10.0
max
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
= 150
. Bold-
face limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Typ
(Note 5)
LM7131AC
LM7131BC
Units
Limit
Limit
(Note 6)
(Note 6)
T.H.D.
Total Harmonic Distortion
F = 4 MHz, A
V
= +2
0.1
%
R
L
= 150
, V
O
= 2.0V
PP
Differential Gain
(Note 10)
0.25
%
Differential Phase
(Note 10)
0.75
SR
Slew Rate
R
L
= 150
, C
L
= 5 pF
150
V/s
(Note 8)
SR
Slew Rate
R
L
= 150
, C
L
= 20 pF
130
V/s
(Note 8)
GBW
Gain-Bandwidth Product
70
MHz
Closed-Loop -3 dB
90
MHz
www.national.com
4
5V 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
= 150
. Bold-
face limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Typ
(Note 5)
LM7131AC
LM7131BC
Units
Limit
Limit
(Note 6)
(Note 6)
Bandwidth
e
n
Input-Referred
f = 1 kHz
11
Voltage Noise
i
n
Input-Referred
f = 1 kHz
3.3
Current Noise
5V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 5V, V
-
= 5V, V
CM
= V
O
= 0V and R
L
= 150
. Boldface
limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Typ
(Note 5)
LM7131AC
LM7131BC
Units
Limit
Limit
(Note 6)
(Note 6)
V
OS
Input Offset Voltage
0.02
3.5
7
mV
4
10
max
TCV
OS
Input Offset Voltage
10
V/C
Average Drift
I
B
Input Bias Current
20
35
35
A
40
40
max
I
OS
Input Offset Current
0.35
3.5
3.5
A
5
5
max
CMRR
Common Mode
-5V
V
CM
3.7V
75
65
65
dB
Rejection Ratio
60
60
min
+PSRR
Positive Power Supply
V
+
= 5V, V
-
= 0V
75
65
65
dB
Rejection Ratio
V
+
= 5V to 10V
60
60
min
-PSRR
Negative Power Supply
V
-
= -5V, V
+
= 0V
75
65
65
dB
Rejection Ratio
V
-
= -5V to -10V
60
60
min
V
CM
Input Common-Mode
V
+
= 5V, V
-
= -5V
-5.0
-5.0
-5.0
V
Voltage Range
For CMRR
60 dB
-5.0
-5.0
min
4.0
3.70
3.70
V
3.60
3.60
max
A
VOL
Voltage Gain
R
L
= 150
,
70
55
55
dB
V
O
= -2.0 to +2.0
50
50
C
IN
Common-Mode
2
pF
Input Capacitance
V
O
Output Swing
V
+
= 5V, V
-
= -5V
4.5
4.3
4.3
V
High
R
L
= 150
4.0
4.0
min
Low
terminated at 0V
-4.5
-3.5
-3.5
V
-2.5
-2.5
max
I
SC
Output Short Circuit
Sourcing, V
O
= -5V
65
45
45
mA
Current
40
40
min
Sinking, V
O
= 5V
40
25
25
mA
20
20
min
I
S
Supply Current
V
+
= +5V, V
-
= -5V
7.5
10.5
10.5
mA
11.5
11.5
max
www.national.com
5
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