LM124 Low-Power Quad Op-Amp

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LM124 IC consist of four independent high-gain frequency-compensated operational amplifiers that are designed specifically to operate from a single supply or split supply over a wide range of voltages. Application areas include transducer amplifiers, DC gain blocks, and all the conventional op-amp circuits which now can be more easily implemented in single power supply systems. For example, the LM124-N series can directly operate off of the standard 5-V power supply voltage.

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.

LM124 Pinout

LM124 Pin Configuration

Pin No	Pin Name	Description
1	OUTPUT 1	Output Of Amplifier 1
2	INV-INPUT 1	Inverting Input Of Amplifier 1
3	NON-INV-INPUT 1	Non Inverting Input Of Amplifier 1
4	V+	Positive Power Supply
5	NON-INV-INPUT 2	Non Inverting Input Of Amplifier 2
6	INV-INPUT 2	Inverting Input Of Amplifier 2
7	OUTPUT 2	Output Of Amplifier 2
8	OUTPUT 3	Output Of Amplifier 3
9	INV-INPUT 3	Inverting Input Of Amplifier 3
10	NON-INV-INPUT 3	Non Inverting Input Of Amplifier 3
11	GND	Ground Pin
12	NON-INV-INPUT 4	Non Inverting Input Of Amplifier 4
13	INV-INPUT 4	Inverting Input Of Amplifier 4
14	OUTPUT 4	Output Of Amplifier 4

LM124 Features and Specification

Internally frequency compensated for unity gain
Large DC voltage gain 100 dB
Wide bandwidth (unity gain) 1 MHz (temperature compensated)
Very low supply current drain (700 µA) — essentially independent of supply voltage
Low input biasing current 45 nA (temperature compensated)
Low input offset voltage 2 mV and offset current: 5 nA
Input common-mode voltage range includes ground
Differential input voltage range equal to the power supply voltage
Large output voltage swing 0V to V+ − 1.5V