LM348 Quad 741 Op-Amp

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LM348 is a quadruple, independent, high-gain, internally compensated operational amplifiers IC. The IC is designed to have operating characteristics similar to the µA741. These amplifiers exhibit low supply-current drain and input bias and offset currents that are much less than those of the µA741. The IC is available in a 14-pin hermetically sealed dual in line IC packaging (DIP).LM348 is compatible with almost every CMOS, NMO, and PMOS device.

Operational Amplifier

Operational amplifiers are simple electronic circuits that can boost a weak signal to a level of higher amplitude. An operational amplifier is generally used in applications such as home entertainment systems, megaphones, speakers, and microphones, etc. An op-amp usually operates with a number of feedback components that determine the resulting function or “operation” of the amplifier and by virtue of the different feedback, configurations whether resistive, capacitive, or both.

LM348 Pinout

LM348 Pin Configuration

Pin No	Pin Name	Description
1	OUT 1	Output Pin 1
2	INV 1	Inverting Input Pin 1
3	NON-INV 1	Non Inverting Input Pin 1
4	V+	Positive Power Supply
5	NON-INV 2	Non Inverting Input Pin 2
6	INV 2	Inverting Input Pin 2
7	OUT 2	Output Pin 2
8	OUT 3	Output Pin 3
9	INV 3	Inverting Input Pin 3
10	NON-INV 3	Non Inverting Input Pin 3
11	V-	Negative Power Supply
12	NON-INV4	Non Inverting Input Pin 4
13	INV 4	Inverting Input Pin 4
14	OUT 4	Output Pin 4

LM348 Features and specification

741 op amp operating characteristics
Low supply current drain: 0.6 mA/Amplifier
Class AB output stage — no crossover distortion
Low input offset current: 4 nA
Pin compatible with the LM124
Low input offset voltage: 1 mV
Low input bias current: 30 nA

Application

The LM148 series are quad low power 741 op amps. In the proliferation of quad op amps, these are the first to offer the convenience of familiar, easy to use operating characteristics of the 741 op amp. In those applications where 741 op amps have been employed, the LM148 series op amps can
be employed directly with no change in circuit performance. The LM149 series has the same characteristics as the LM148 except it has been decompensated to provide a wider bandwidth. As a result the part requires a minimum gain of 5.