LMC6492BEM NSC [National Semiconductor], LMC6492BEM Datasheet

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LMC6492BEM

Manufacturer Part Number
LMC6492BEM
Description
CMOS Rail-to-Rail Input and Output Operational Amplifier
Manufacturer
NSC [National Semiconductor]
Datasheet

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© 1999 National Semiconductor Corporation
LMC6492 Dual/LMC6494 Quad
CMOS Rail-to-Rail Input and Output Operational
Amplifier
General Description
The LMC6492/LMC6494 amplifiers were specifically devel-
oped for single supply applications that operate from −40˚C
to +125˚C. This feature is well-suited for automotive systems
because of the wide temperature range. A unique design to-
pology enables the LMC6492/LMC6494 common-mode volt-
age range to accommodate input signals beyond the rails.
This eliminates non-linear output errors due to input signals
exceeding a traditionally limited common-mode voltage
range. The LMC6492/LMC6494 signal range has a high
CMRR of 82 dB for excellent accuracy in non-inverting circuit
configurations.
The LMC6492/LMC6494 rail-to-rail input is complemented
by rail-to-rail output swing. This assures maximum dynamic
signal range which is particularly important in 5V systems.
Ultra-low input current of 150 fA and 120 dB open loop gain
provide high accuracy and direct interfacing with high imped-
ance sources.
Connection Diagrams
8-Pin DIP/SO
Top View
DS012049-1
DS012049
Features
(Typical unless otherwise noted)
n Rail-to-Rail input common-mode voltage range,
n Rail-to-Rail output swing within 20 mV of supply rail,
n Operates from 5V to 15V supply
n Excellent CMRR and PSRR
n Ultra low input current 150 fA
n High voltage gain (R
n Low supply current (
n Low offset voltage drift 1.0 µV/˚C
Applications
n Automotive transducer amplifier
n Pressure sensor
n Oxygen sensor
n Temperature sensor
n Speed sensor
guaranteed over temperature
100 k
load
14-Pin DIP/SO
L
@
Top View
= 100 k ) 120 dB
V
S
= 5V) 500 µA/Amplifier
82 dB
DS012049-2
October 1994
www.national.com

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LMC6492BEM Summary of contents

Page 1

LMC6492 Dual/LMC6494 Quad CMOS Rail-to-Rail Input and Output Operational Amplifier General Description The LMC6492/LMC6494 amplifiers were specifically devel- oped for single supply applications that operate from −40˚C to +125˚C. This feature is well-suited for automotive systems because of the wide ...

Page 2

... Molded DIP 14-Pin Small Outline 14-Pin Molded DIP www.national.com Temperature Range Transport Media Extended −40˚C to +125˚C LMC6492AEM Rails LMC6492BEM LMC6492AEMX Tape and Reel LMC6492BEMX LMC6492AEN Rails LMC6492BEN LMC6494AEM Rails LMC6494BEM LMC6494AEMX Tape and Reel LMC6494BEMX LMC6494AEN Rails LMC6494BEN ...

Page 3

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Differential Input Voltage + Voltage at Input/Output Pin ( 0.3V − ...

Page 4

DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for T face limits apply at the temperature extremes Symbol Parameter V Output Swing O I Output Short Circuit Current Output Short Circuit Current SC ...

Page 5

AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for T face limits apply at the temperature extremes Symbol Parameter SR Slew Rate (Note 9) + GBW Gain-Bandwidth Product V Phase Margin m G Gain Margin m Amp-to-Amp Isolation (Note ...

Page 6

Typical Performance Characteristics specified (Continued) Sourcing Current vs Output Voltage DS012049-28 Sinking Current vs Output Voltage DS012049-31 Input Voltage Noise vs Frequency DS012049-34 www.national.com = +15V, Single Supply Sourcing Current vs Output Voltage DS012049-29 Sinking Current vs ...

Page 7

Typical Performance Characteristics specified (Continued) Input Voltage Noise vs Input Voltage DS012049-37 Positive PSRR vs Frequency DS012049-40 CMRR vs Input Voltage DS012049-43 = +15V, Single Supply Crosstalk Rejection vs Frequency DS012049-38 Negative PSRR vs Frequency DS012049-41 CMRR ...

Page 8

Typical Performance Characteristics specified (Continued CMR DS012049-46 Input Voltage vs Output Voltage DS012049-49 Open Loop Frequency Response vs Temperature DS012049-52 www.national.com = +15V, Single Supply CMR DS012049-47 Open Loop Frequency Response ...

Page 9

Typical Performance Characteristics specified (Continued) Gain and Phase vs Capacitive Load DS012049-55 Slew Rate vs Supply Voltage DS012049-58 Non-Inverting Large Signal Pulse Response DS012049-61 = +15V, Single Supply Open Loop Output Impedance vs Frequency DS012049-56 Non-Inverting Large ...

Page 10

Typical Performance Characteristics specified (Continued) Non-Inverting Small Signal Pulse Response DS012049-64 Inverting Large Signal Pulse Response DS012049-67 Inverting Small Signal Pulse Response DS012049-70 www.national.com = +15V, Single Supply Inverting Large Signal Pulse Response DS012049-65 Inverting Small Signal ...

Page 11

Typical Performance Characteristics specified (Continued) Stability vs Capacitive Load DS012049-73 Stability vs Capacitive Load DS012049-76 Application Notes Input Common-Mode Voltage Range Unlike Bi-FET amplifier designs, the LMC6492/4 does not exhibit phase inversion when an input voltage exceeds the negative supply ...

Page 12

Application Notes (Continued) FIGURE 3. R Input Current Protection for I Voltages Exceeding the Supply Voltages Rail-To-Rail Output The approximate output resistance of the LMC6492 5V. Using the calcu- 110 sourcing and 80 sinking lated ...

Page 13

Application Notes (Continued) DS012049-14 Inverting Amplifier Non-Inverting Amplifier DS012049-16 Follower FIGURE 7. Typical Connections of Guard Rings The designer should be aware that when it is inappropriate to lay out a PC board for the sake of just a few ...

Page 14

Application Circuits (Continued) High Input Z, DC Differential Amplifier For (CMRR depends on this resistor ratio match) = 2(V As shown: V − Photo Voltaic-Cell Amplifier Instrumentation Amplifier R5 R6, ...

Page 15

Application Circuits (Continued) and R4 to change. The resistors change in a way such that R2 and R4 increase by the same amount R1 and R3 de- crease. This causes a differential voltage between the input of the amplifier. The ...

Page 16

... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LMC6492AEM or LMC6492BEM Order Number LMC6494AEM or LMC6494BEM www.national.com 8-Pin Small Outline Package NS Package Number M08A 14-Pin Small Outline Package NS Package Number M14A 16 ...

Page 17

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 8-Lead (0.300" Wide) Molded Dual-In-Line Package Order Number LMC6492AEN or LMC6492BEN 14-Lead Molded Dual-In-Line Package Order Number LMC6494AEN or LMC6494BEN NS Package Number N08A NS Package Number N14A 17 www.national.com ...

Page 18

LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE- VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI- CONDUCTOR CORPORATION. As used herein: 1. Life support devices ...

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