LM8261 Single
RRIO, High Output Current & Unlimited Cap Load Op
Amp in SOT23-5
General Description
The LM8261 is a Rail-to-Rail input and output Op Amp which
can operate with a wide supply voltage range. This device
has high output current drive, greater than Rail-to-Rail input
common mode voltage range, unlimited capacitive load drive
capability, and provides tested and guaranteed high speed
and slew rate while requiring only 0.97mA supply current. It
is specifically designed to handle the requirements of flat
panel TFT panel V
COM
driver applications as well as being
suitable for other low power, and medium speed applications
which require ease of use and enhanced performance over
existing devices.
Greater than Rail-to-Rail input common mode voltage range
with 50dB of Common Mode Rejection, allows high side and
low side sensing, among many applications, without having
any concerns over exceeding the range and no compromise
in accuracy. Exceptionally wide operating supply voltage
range of 2.5V to 30V alleviates any concerns over function-
ality under extreme conditions and offers flexibility of use in
multitude of applications. In addition, most device param-
eters are insensitive to power supply variations; this design
enhancement is yet another step in simplifying its usage.
The output stage has low distortion (0.05% THD+N) and can
supply a respectable amount of current (15mA) with minimal
headroom from either rail (300mV).
The LM8261 is offered in the space saving SOT23-5 pack-
age.
Features
(V
S
= 5V, T
A
= 25C, Typical values unless specified).
n
GBWP
21MHz
n
Wide supply voltage range
2.5V to 30V
n
Slew rate
12V/s
n
Supply current
0.97 mA
n
Cap load limit
Unlimited
n
Output short circuit current
+53mA/-75mA
n
+/-5% Settling time
400ns (500pF, 100mV
PP
step)
n
Input common mode voltage
0.3V beyond rails
n
Input voltage noise
15nV/
n
Input current noise
1pA/
n
THD+N
<
0.05%
Applications
n
TFT-LCD flat panel V
COM
driver
n
A/D converter buffer
n
High side/low side sensing
n
Headphone amplifier
Output Response with Heavy Capacitive Load
DS101084-37
April 2000
LM8261
Single
RRIO,
High
Output
Current
&
Unlimited
Cap
Load
Op
Amp
in
SOT23-5
2000 National Semiconductor Corporation
DS101084
www.national.com
Connection Diagram
Ordering Information
Package
Ordering Info
Pkg Marking
Supplied AS
NSC Drawing
5-Pin SOT-23
LM8261M5
A45A
1K Units Tape and Reel
MA05B
LM8261M5X
3K Units Tape and Reel
SOT23-5
DS101084-62
Top View
LM8261
www.national.com
2
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
2KV (Note 2)
200V(Note 9)
V
IN
Differential
+/-10V
Output Short Circuit Duration
(Notes 3, 11)
Supply Voltage (V
+
- V
-
)
32V
Voltage at Input/Output pins
V
+
+0.8V, V
-
-0.8V
Storage Temperature Range
-65C to +150C
Junction Temperature (Note 4)
+150C
Soldering Information:
Infrared or Convection (20 sec.)
235C
Wave Soldering (10 sec.)
260C
Operating Ratings
Supply Voltage (V
+
- V
-
)
2.5V to 30V
Junction Temperature Range(Note 4)
-40C to +85C
Package Thermal Resistance,
JA
,(Note 4)
SOT23-5
325C/W
2.7V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 2.7V, V
-
= 0V, V
CM
= 0.5V, V
O
= V
+
/2, and
R
L
>
1M
to V
-
. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Condition
Typ
(Note 5)
Limit
(Note 6)
Units
V
OS
Input Offset Voltage
V
CM
= 0.5V & V
CM
= 2.2V
+/-0.7
+/-5
+/-7
mV
max
TC V
OS
Input Offset Average Drift
V
CM
= 0.5V & V
CM
= 2.2V
(Note 12)
+/-2
V/C
I
B
Input Bias Current
V
CM
= 0.5V
(Note 7)
-1.20
-2.00
-2.70
A
max
V
CM
= 2.2V
(Note 7)
+0.49
+1.00
+1.60
I
OS
Input Offset Current
V
CM
= 0.5V & V
CM
= 2.2V
20
250
400
nA
max
CMRR
Common Mode Rejection Ratio
V
CM
stepped from 0V to 1.0V
100
76
60
dB
min
V
CM
stepped from 1.7V to 2.7V
100
V
CM
stepped from 0V to 2.7V
70
58
50
+PSRR
Positive Power Supply
Rejection Ratio
V
+
= 2.7V to 5V
104
78
74
dB
min
CMVR
Input Common-Mode Voltage
Range
CMRR
>
50dB
-0.3
-0.1
0.0
V
max
3.0
2.8
2.7
V
min
A
VOL
Large Signal Voltage Gain
V
O
= 0.5 to 2.2V,
R
L
= 10K to V
-
78
70
67
dB
min
V
O
= 0.5 to 2.2V,
R
L
= 2K to V
-
73
67
63
dB
min
V
O
Output Swing
High
R
L
= 10K to V
-
2.59
2.49
2.46
V
min
R
L
= 2K to V
-
2.53
2.45
2.41
Output Swing
Low
R
L
= 10K to V
-
90
100
120
mV
max
I
SC
Output Short Circuit Current
Sourcing to V
-
V
ID
= 200mV (Note 10)
48
30
20
mA
min
Sinking to V
+
V
ID
= -200mV (Note 10)
65
50
30
mA
min
I
S
Supply Current
No load, V
CM
= 0.5V
0.95
1.20
1.50
mA
max
SR
Slew Rate (Note 8)
A
V
= +1,V
I
= 2V
PP
9
V/s
LM8261
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3
2.7V Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= 2.7V, V
-
= 0V, V
CM
= 0.5V, V
O
= V
+
/2, and
R
L
>
1M
to V
-
. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Condition
Typ
(Note 5)
Limit
(Note 6)
Units
f
u
Unity Gain-Frequency
V
I
= 10mV, R
L
= 2K
to V
+
/2
10
MHz
GBWP
Gain Bandwidth Product
f = 50KHz
21
15.5
14
MHz
min
Phi
m
Phase Margin
V
I
= 10mV
50
Deg
e
n
Input-Referred Voltage Noise
f = 2KHz, R
S
= 50
15
nV/
i
n
Input-Referred Current Noise
f = 2KHz
1
pA/
f
max
Full Power Bandwidth
Z
L
= (20pF || 10K
) to V
+
/2
1
MHz
5V Electrical Characteristics
Unless otherwise specified, all limited guaranteed for T
J
= 25C, V
+
= 5V, V
-
= 0V, V
CM
= 1V, V
O
= V
+
/2, and
R
L
>
1M
to V
-
. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Condition
Typ
(Note 5)
Limit
(Note 6)
Units
V
OS
Input Offset Voltage
V
CM
= 1V & V
CM
= 4.5V
+/-0.7
+/-5
+/- 7
mV
max
TC V
OS
Input Offset Average Drift
V
CM
= 1V & V
CM
= 4.5V
(Note 12)
+/-2
V/C
I
B
Input Bias Current
V
CM
= 1V
(Note 7)
-1.18
-2.00
-2.70
A
max
V
CM
= 4.5V
(Note 7)
+0.49
+1.00
+1.60
I
OS
Input Offset Current
V
CM
= 1V & V
CM
= 4.5V
20
250
400
nA
max
CMRR
Common Mode Rejection Ratio
V
CM
stepped from 0V to 3.3V
110
84
72
dB
min
V
CM
stepped from 4V to 5V
100
V
CM
stepped from 0V to 5V
80
64
61
+PSRR
Positive Power Supply Rejection
Ratio
V
+
= 2.7V to 5V, V
CM
= 0.5V
104
78
74
dB
min
CMVR
Input Common-Mode Voltage Range
CMRR
>
50dB
-0.3
-0.1
0.0
V
max
5.3
5.1
5.0
V
min
A
VOL
Large Signal Voltage Gain
V
O
= 0.5 to 4.5V,
R
L
= 10K to V
-
84
74
70
dB
min
V
O
= 0.5 to 4.5V,
R
L
= 2K to V
-
80
70
66
V
O
Output Swing
High
R
L
= 10K to V
-
4.87
4.75
4.72
V
min
R
L
= 2K to V
-
4.81
4.70
4.66
Output Swing
Low
R
L
= 10K to V
-
86
125
135
mV
max
I
SC
Output Short Circuit Current
Sourcing to V
-
V
ID
= 200mV (Note 10)
53
35
20
mA
min
Sinking to V
+
V
ID
= -200mV (Note 10)
75
60
50
LM8261
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4
5V Electrical Characteristics
(Continued)
Unless otherwise specified, all limited guaranteed for T
J
= 25C, V
+
= 5V, V
-
= 0V, V
CM
= 1V, V
O
= V
+
/2, and
R
L
>
1M
to V
-
. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Condition
Typ
(Note 5)
Limit
(Note 6)
Units
I
S
Supply Current
No load, V
CM
= 1V
0.97
1.25
1.75
mA
max
SR
Slew Rate (Note 8)
A
V
= +1, V
I
= 5V
PP
12
10
7
V/s
min
f
u
Unity Gain Frequency
V
I
= 10mV,
R
L
= 2K
to V
+
/2
10.5
MHz
GBWP
Gain-Bandwidth Product
f = 50KHz
21
16
15
MHz
min
Phi
m
Phase Margin
V
I
= 10mV
53
Deg
e
n
Input-Referred Voltage Noise
f = 2KHz, R
S
= 50
15
nV/
i
n
Input-Referred Current Noise
f = 2KHz
1
pA/
f
max
Full Power Bandwidth
Z
L
= (20pF || 10k
) to V
+
/2
900
KHz
t
S
Settling Time (+/-5%)
100mV
PP
Step, 500pF load
400
ns
THD+N
Total Harmonic Distortion + Noise
R
L
= 1K
to V
+
/2
f = 10KHz to A
V
= +2, 4V
PP
swing
0.05
%
+/-15V Electrical Characteristics
Unless otherwise specified, all limited guaranteed for T
J
= 25C, V
+
= 15V, V
-
= -15V, V
CM
= 0V, V
O
= 0V, and
R
L
>
1M
to 0V. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Condition
Typ
(Note 5)
Limit
(Note 6)
Units
V
OS
Input Offset Voltage
V
CM
= -14.5V & V
CM
= 14.5V
+/-0.7
+/-7
+/- 9
mV
max
TC V
OS
Input Offset Average Drift
V
CM
= -14.5V & V
CM
= 14.5V
(Note 12)
+/-2
V/C
I
B
Input Bias Current
V
CM
= -14.5V
(Note 7)
-1.05
-2.00
-2.80
A
max
V
CM
= 14.5V
(Note 7)
+0.49
+1.00
+1.50
I
OS
Input Offset Current
V
CM
= -14.5V & V
CM
= 14.5V
30
275
550
nA
max
CMRR
Common Mode Rejection Ratio
V
CM
stepped from -15V to 13V
100
84
80
dB
min
V
CM
stepped from 14V to 15V
100
V
CM
stepped from -15V to 15V
88
74
72
+PSRR
Positive Power Supply Rejection
Ratio
V
+
= 12V to 15V
100
70
66
dB
min
-PSRR
Negative Power Supply Rejection
Ratio
V
-
= -12V to -15V
100
70
66
dB
min
CMVR
Input Common-Mode Voltage Range
CMRR
>
50dB
-15.3
-15.1
-15.0
V
max
15.3
15.1
15.0
V
min
LM8261
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5
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