lm8272mmx National Semiconductor Corporation, lm8272mmx Datasheet

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lm8272mmx

Manufacturer Part Number
lm8272mmx
Description
Rrio, High Output Current & Unlimited Cap Load Op Amp In Miniature Package
Manufacturer
National Semiconductor Corporation
Datasheet

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© 2002 National Semiconductor Corporation
8-Pin MSOP
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
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.
Connection Diagram
Package
8-Pin MSOP
COM
Top View
Part Number
LM8272MMX
LM8272MM
driver applications as well as
DS101308
10130863
Package Marking
A60
Features
(V
n GBWP
n Wide supply voltage range
n Slew rate
n Supply current/channel
n Cap load tolerance
n Output short circuit current
n Output current (1V from rails)
n Input common mode voltage
n Input voltage noise
n Input current noise
Applications
n TFT-LCD flat panel V
n A/D converter buffer
n High side/low side sensing
n Headphone amplifier
Ordering Information
S
Large Signal Step Response for Various Cap. Load
= 12V, T
3.5k Unit Tape and Reel
A
1k Unit Tape and Reel
= 25˚C, Typical values unless specified).
Transport Media
COM
driver
0.3V beyond rails
December 2002
10130899
NSC Drawing
www.national.com
MUA08A
2.5V to 24V
1.4pA/
15nV/
Unlimited
±
0.95mA
±
15MHz
130mA
15V/µs
65mA

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lm8272mmx Summary of contents

Page 1

... The LM8272 is offered in the 8-pin MSOP package. Connection Diagram 8-Pin MSOP Top View Package Part Number 8-Pin MSOP LM8272MM LM8272MMX © 2002 National Semiconductor Corporation Features (V = 12V 25˚C, Typical values unless specified GBWP ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance V Differential IN Output Short Circuit Duration + − Supply Voltage ( Voltage at ...

Page 3

Electrical Characteristics Unless otherwise specified, all limited guaranteed for T > − R 1MΩ Boldface limits apply at the temperature extremes. L Symbol Parameter i Input-Referred Current Noise n f Full Power Bandwidth max 12V Electrical ...

Page 4

Electrical Characteristics Unless otherwise specified, all limited guaranteed for T > − R 1MΩ Boldface limits apply at the temperature extremes. L Symbol Parameter −3dB BW Small Signal -3db Bandwidth e Input-Referred Voltage Noise n i ...

Page 5

Typical Performance Charateristics V Distribution OS V vs. V for 3 Representative Units vs. V for 3 Representative Units vs 101308A2 V vs 10130829 V vs ...

Page 6

Typical Performance Charateristics V vs. V for 3 Representative Units vs vs www.national.com (Continued) 10130882 101308A3 10130875 10130871 I vs 10130872 ...

Page 7

Typical Performance Charateristics I vs +PSRR vs. Frequency Open Loop Gain/Phase for Various Supplies (Continued) CMRR vs. Frequency 10130873 −PSRR vs. Frequency 10130888 Closed Loop Frequency Response for Various Gains 10130893 7 10130887 10130889 10130896 www.national.com ...

Page 8

Typical Performance Charateristics Closed Loop Frequency Response for Various Gains Maximum Output Swing vs. Load (1% Distortion) Closed Loop Small Signal Frequency Response for Various C L www.national.com (Continued) Closed Loop Frequency Response for Various Gains R 10130895 Maximum Output ...

Page 9

Typical Performance Charateristics ± Settling Time ( 1%) & Slew Rate vs. Cap Load − V from V vs. I OUT SINK Step Response for Various Amplitudes (Continued) V 10130879 Step Response for Various Amplitudes 10130897 Large Signal Step Response ...

Page 10

Typical Performance Charateristics THD+N vs. Input Amplitude for Various Frequency Closed Loop Output Impedance vs. Frequency www.national.com (Continued) Input Referred Noise Density 10130892 Crosstalk Rejection vs. Frequency 10130885 10 10130880 10130881 ...

Page 11

Application Notes BLOCK DIAGRAM AND OPEATIONAL DESCRIPTION A) INPUT STAGE: As can be seen from the simplified schematic in Figure 1, the input stage consists of two distinct differential pairs (Q1-Q2 and Q3-Q4) in order to accommodate the full Rail-to-Rail ...

Page 12

Application Notes (Continued) < Noise Gain ( 2) and with less than 150mV voltage to the supply rail, if the output loading is light, the Phase Margin reduction could result in unwanted oscillations. In the case of the LM8272, due ...

Page 13

Application Notes (Continued) OUTPUT SHORT CIRCUIT CURRENT AND DISSIPATION ISSUES: The LM8272 output stage is designed for maximum output current capability. Even though momentary output shorts to ground and either supply can be tolerated at all operating voltages, longer lasting ...

Page 14

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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