LM8272 Dual
RRIO, High Output Current & Unlimited Cap Load Op
Amp in Miniature Package
General Description
The LM8272 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 while requiring only 0.95mA/channel supply cur-
rent. 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 ap-
plications which require ease of use and enhanced perfor-
mance 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 24V 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 LM8272 is offered in the 8-pin MSOP package.
Features
(V
S
= 12V, T
A
= 25C, Typical values unless specified).
n
GBWP
15MHz
n
Wide supply voltage range
2.5V to 24V
n
Slew rate
15V/s
n
Supply current/channel
0.95mA
n
Cap load tolerance
Unlimited
n
Output short circuit current
130mA
n
Output current (1V from rails)
65mA
n
Input common mode voltage
0.3V beyond rails
n
Input voltage noise
15nV/
n
Input current noise
1.4pA/
Applications
n
TFT-LCD flat panel V
COM
driver
n
A/D converter buffer
n
High side/low side sensing
n
Headphone amplifier
Connection Diagram
8-Pin MSOP
10130863
Top View
Large Signal Step Response for Various Cap. Load
10130899
Ordering Information
Package
Part Number
Package Marking
Transport Media
NSC Drawing
8-Pin MSOP
LM8272MM
A60
1k Unit Tape and Reel
MUA08A
LM8272MMX
3.5k Unit Tape and Reel
December 2002
LM8272
Dual
RRIO,
High
Output
Current
&
Unlimited
Cap
Load
Op
Amp
in
Miniature
Package
2002 National Semiconductor Corporation
DS101308
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
2KV (Note 2)
200V(Note 9)
V
IN
Differential
+/-10V
Output Short Circuit Duration
(Notes 3, 11)
Supply Voltage (V
+
- V
-
)
27V
Voltage at Input/Output pins
V
+
+0.3V, V
-
-0.3V
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 24V
Junction Temperature Range(Note 4)
-40C to +85C
Package Thermal Resistance,
JA
,(Note 4)
8-Pin MSOP
235C/W
5V Electrical Characteristics
Unless otherwise specified, all limited guaranteed for T
J
= 25C, V
+
= 5V, 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
= 4.5V
+/-0.7
+/-5
+/- 7
mV
max
TC V
OS
Input Offset Average Drift
V
CM
= 0.5V & V
CM
= 4.5V
(Note 12)
+/-2
--
V/C
I
B
Input Bias Current
(Note 7)
--
2.00
2.70
A
max
I
OS
Input Offset Current
20
250
400
nA
max
CMRR
Common Mode Rejection Ratio
V
CM
stepped from 0V to 5V
80
64
61
dB
min
+PSRR
Positive Power Supply Rejection Ratio
V
+
from 4.5V to 13V
100
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
+
/2
80
64
60
dB
min
V
O
Output Swing
High
R
L
= 10k
to V
-
4.93
4.85
V
min
I
SOURCE
= 5mA
4.85
4.70
Output Swing
Low
R
L
= 10k
to V
+
215
250
mV
max
I
SINK
= 5mA
300
350
I
SC
Output Short Circuit Current
Sourcing to V
-
V
ID
= 200mV (Note 10)
100
--
mA
Sinking to V
+
V
ID
= -200mV (Note 10)
100
--
I
OUT
Output Current
V
ID
=
200mV, V
O
= 1V from rails
55
--
mA
I
S
Supply Current (Both Channel)
No load, V
CM
= 0.5V
1.8
2.3
2.8
mA
max
SR
Slew Rate (Note 8)
A
V
= +1, V
I
= 5V
PP
12
--
V/s
f
u
Unity Gain Frequency
V
I
= 10mVp, R
L
= 2K
to V
+
/2
7.5
--
MHz
GBWP
Gain-Bandwidth Product
f = 50KHz
13
--
MHz
Phi
m
Phase Margin
V
I
= 10mVp, R
L
= 2k
to V
+
/2
55
--
deg
e
n
Input-Referred Voltage Noise
f = 2KHz, R
S
= 50
15
--
nV/
LM8272
Dual
www.national.com
2
5V Electrical Characteristics
(Continued)
Unless otherwise specified, all limited guaranteed for T
J
= 25C, V
+
= 5V, 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
i
n
Input-Referred Current Noise
f = 2KHz
1.4
--
pA/
f
max
Full Power Bandwidth
Z
L
= (20pF || 10k
) to V
+
/2
700
--
KHz
12V Electrical Characteristics
Unless otherwise specified, all limited guaranteed for T
J
= 25C, V
+
= 12V, V
-
= 0V, V
CM
= 6V, V
O
= 6V, 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
= 11.5V
+/-0.7
+/-7
+/- 9
mV
max
TC V
OS
Input Offset Average Drift
V
CM
= 0.5V & V
CM
= 11.5V
(Note 12)
+/-2
--
V/C
I
B
Input Bias Current
(Note 7)
--
2.00
2.80
A
max
I
OS
Input Offset Current
30
275
550
nA
max
CMRR
Common Mode Rejection Ratio
V
CM
stepped from 0V to 12V
88
74
72
dB
min
+PSRR
Positive Power Supply Rejection Ratio
V
+
from 4.5V to 13V, V
CM
= 0.5V
100
78
74
dB
min
-PSRR
Negative Power Supply Rejection
Ratio
85
--
dB
CMVR
Input Common-Mode Voltage Range
CMRR
>
50dB
-0.3
-0.1
0
V
max
12.3
12.1
12.0
V
min
A
VOL
Large Signal Voltage Gain
V
O
= 1V to 11V
R
L
= 10k
to V
+
/2
83
74
70
dB
min
V
O
Output Swing
High
R
L
10k
to V
+
/2
11.8
11.7
V
min
I
SOURCE
= 5mA
11.6
11.5
Output Swing
Low
R
L
= 10k
to V
+
/2
0.25
0.3
V
max
I
SINK
= 5mA
.40
.45
I
SC
Output Short Circuit Current
Sourcing to V
-
V
ID
= 200mV (Note 10)
130
110
mA
min
Sinking to V
+
V
ID
= 200mV (Note 10)
130
110
I
OUT
Output Current
V
ID
=
200mV, V
O
= 1V from rails
65
--
mA
I
S
Supply Current (Both Channel)
No load, V
CM
= 0.5V
1.9
2.4
2.9
mA
max
SR
Slew Rate
(Note 8)
A
V
= +1, V
I
= 10V
PP
, C
L
= 10pF
15
--
V/s
A
V
= +1, V
I
= 10V
PP
, C
L
= 0.1F
1
--
R
OUT
Close Loop Output Resistance
A
V
= +1, f = 100KHz
3
--
f
u
Unity Gain Frequency
V
I
= 10mVp, R
L
= 2k
to V
+
/2
8
--
MHz
GBWP
Gain-Bandwidth Product
f = 50KHz
15
--
MHz
Phi
m
Phase Margin
V
I
= 10mVp, R
L
= 2k
to V
+
/2
57
--
Deg
GM
Gain Margin
V
I
= 10mVp, R
L
= 2k
to V
+
/2
20
--
dB
LM8272
Dual
www.national.com
3
12V Electrical Characteristics
(Continued)
Unless otherwise specified, all limited guaranteed for T
J
= 25C, V
+
= 12V, V
-
= 0V, V
CM
= 6V, V
O
= 6V, and
R
L
>
1M
to V
-
. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Condition
Typ
(Note 5)
Limit
(Note 6)
Units
-3dB BW
Small Signal -3db Bandwidth
A
V
= +1, R
L
= 2k
to V
+
/2
12.5
--
MHz
A
V
= +1, R
L
= 600
to V
+
/2
10.5
--
A
V
= +10, R
L
= 600
to V
+
/2
1.0
--
e
n
Input-Referred Voltage Noise
f = 2KHz, R
S
= 50
15
--
nV/
i
n
Input-Referred Current Noise
f = 2KHz
1.4
--
pA/
f
max
Full Power Bandwidth
Z
L
= (20pF || 10k
) to V
+
/2
300
--
KHz
THD+N
Total Harmonic Distortion +Noise
A
V
= +2, R
L
= 2k
to V
+
/2
V
O
= 8V
PP
, V
S
=
5V
0.02
--
%
CT Rej.
Cross-Talk Rejection
f = 5MHz, Driver R
L
= 10k
to V
+
/2
68
--
dB
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Rating 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, 1.5k
in series with 100pF.
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.
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 onto 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: Positive current corresponds to current flowing into the device.
Note 8: Slew rate is the slower of the rising and falling slew rates. Connected as a Voltage Follower.
Note 9: Machine Model, 0
is series with 200pF.
Note 10: Short circuit test is a momentary test. See Note 11.
Note 11: Output short circuit duration is infinite for V
S
6V at room temperature and below. For V
S
>
6V, allowable short circuit duration is 1.5ms.
Note 12: Offset voltage average drift determined by dividing the change in V
OS
at temperature extremes into the total temperature change.
LM8272
Dual
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4
Typical Performance Charateristics
V
OS
Distribution
V
OS
vs. V
CM
for 3 Representative Units
101308A2
10130830
V
OS
vs. V
CM
for 3 Representative Units
V
OS
vs. V
CM
for 3 Representative Units
10130829
10130831
V
OS
vs. V
S
for 3 Representative Units
V
OS
vs. V
S
for 3 Representative Units
10130884
10130883
LM8272
Dual
www.national.com
5
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