LM258AD Integrated Circuits (ICs)

Voltage - Input Offset:	2mV
Base Part Number:	LM258
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-25°C ~ 85°C
Voltage - Supply, Single/Dual (±):	3 V ~ 32 V, ±1.5 V ~ 16 V
Current - Output / Channel:	30mA
Current - Supply:	1mA
Series:	--
Current - Input Bias:	20nA
Gain Bandwidth Product:	700kHz
Slew Rate:	0.3 V/µs
Output Type:	--
Number of Circuits:	2
Amplifier Type:	General Purpose
Part Status:	Active
Packaging:	Tube

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Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

LM258AD is a monolithic integrated circuit from the family of dual operational amplifiers. Its wide range of applications requires the understanding of its working principle and fields of usage. The LM258AD is a dual high-speed JFET input operational amplifier. It is suitable for a wide range of analog applications such as gain control, signal filtering, signal processing, instrumentation, etc. It also provides very low bias current and is a suitable choice for low power designs.The device consists of two independent, internally frequency compensated, high gain operational amplifiers. Each of these amplifiers has an input stage direct coupled, an offset null and an output stage providing the desired gain. The maximum input and output voltage of the device is 36V, the input current is greater than 0.5mA, and the maximum output voltage swing is greater than 18V. The device requires a supply voltage of ±15V with a power dissipation of 1.4W. The main features of the device are: -High speed - 0.4V/μs-High gain - 105dB-High common mode rejection ratio - 80dB-Wide common mode voltage range-Common mode rejection of +/-10V-Low power consumption-High input impedance-High output impedanceThe most common application of the device is in instrumentation amplifiers where the high common mode rejection and high input impedance capability of the device enables it to be used in a variety of applications such as strain gauge measurements, temperature measurements, bio-medical and other test applications.The device can also be used as a gain control amplifier, voltage follower, signal filtering and signal conditioning, signal smoothing and summing amplifiers, and as a differential amplifier. It is also a suitable choice for AC and DC coupling of signal sources. The working principle of the LM258AD is based on the field effect transistor (FET) technology. A FET is a semiconductor device that is used to amplify, switch, or modify an applied signal. It consists of three terminals: the source, gate, and drain. The source and drain of the device are electrical connections, while the gate rectifies the signal and modulates the conductivity of the semiconductor material between the source and drain. The LM258AD uses this technology to provide high gain, high common mode rejection and high input impedance, along with low power consumption. The device consists of two independent internally frequency compensated high gain operational amplifiers with direct input. Signals are applied to the inputs which are buffered by an internal JFET. The inverting and non-inverting amplifiers then amplify the signal and the output is taken from the output stages of both the amplifiers.In conclusion, the LM258AD is a high performance dual operational amplifier which is suitable for a wide range of analog applications such as gain control, signal filtering, signal processing, and instrumentation. The device offers high speed, high gain, high common mode rejection, wide common mode voltage range, low power consumption, and high input and output impedance which makes it an ideal choice for low power designs.

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