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LF442-MILAMH Datasheet(PDF) 11 Page - Texas Instruments

Part # LF442-MILAMH
Description  Dual Low Power JFET Input Operational Amplifier
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
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LF442-MILAMH Datasheet(HTML) 11 Page - Texas Instruments

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LM442-MIL
www.ti.com
SNOSD59 – JUNE 2017
Product Folder Links: LM442-MIL
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Copyright © 2017, Texas Instruments Incorporated
7 Detailed Description
7.1 Overview
The LF442-MIL dual low power operational amplifiers provide many of the same AC characteristics as the
industry standard LM1458 while greatly improving the DC characteristics of the LM1458. The amplifiers have the
same bandwidth, slew rate, and gain (10 kΩ load) as the LM1458 and only draw one tenth the supply current of
the LM1458. In addition the well matched high voltage JFET input devices of the LF442-MIL reduce the input
bias and offset currents by a factor of 10,000 over the LM1458. A combination of careful layout design and
internal trimming ensures very low input offset voltage and voltage drift. The LF442-MIL also has a very low
equivalent input noise voltage for a low power amplifier.
The LF442-MIL is pin compatible with the LM1458 allowing an immediate 10 times reduction in power drain in
many applications. The LF442-MIL should be used where low power dissipation and good electrical
characteristics are the major considerations.
7.2 Functional Block Diagram
Figure 26. Each Amplifier
7.3 Feature Description
The amplifier's differential inputs consist of a non-inverting input (+IN) and an inverting input (-IN). The amplifier
amplifies only the difference in voltage between the two inputs, which is called the differential input voltage. The
output voltage of the op-amp VOUT is given by the equation VOUT = AOL(IN+ - IN-).


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