LM258P Low Power Dual Bipolar Op-amps:Description,Features and Applications

LM258 is dual operational amplifiers IC and is a member of ‘LMxx’ family. The chip consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. 

LM258 has a lot of features including high DC voltage gain, large bandwidth, different input voltage equal to power supply, large output voltage swing, common mode input voltages include ground. These were the few of major features associated with LM258 operational amplifier. 

LM258 has a very wide range of real life applications. Its applications include DC gain blocks, transducer amplifiers, operational amplifiers circuits which can be implemented using single power supply source. LM258 can be directly used with a voltage supply of 3.3V which is the most common voltage standard in digital systems. 

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-Wide range of supply voltage

-Can work from single power supply

-Two individually operated operational amplifiers

-Low noise interference among op-amps

-Wide bandwidth (Unity Gain): 1 MHz(temperature compensated)

-Large DC Voltage Gain: 100 dB

-Low Input Offset Voltage: 2 mV

-Low input offset current: 2 nA

-Low input bias current: 20 nA (temperature compensated)

-Input common-mode voltage range includes ground and negative rails. Enabling direct sensing near ground

-Differential input voltage range equal to the power supply voltage

-Internal frequency compensation

-Single supply operation: +3.0 V to +32 V

-Dual  supply operation: +16V and -16V

-Very low supply current drain (500µA)

-Operating temperature: -25ºC to 85ºC

-Total power dissipation: 830mW

Texas Instruments LM258P technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments LM258P.

As mentioned earlier there are two op-amps in the LM258 IC and they are connected internally as shown below

Here theses two op-amps can be used to realize any of op-amp application circuits like amplifier, comparator, oscillators and mathematical operations.  So we will construct a simple Non inverting amplifier to understand the use of device.

Now let us take a single op-amp from the two and construct a simple application circuit as show below.

In the above circuit the op-amp acts as a Non-Inverting Amplifier (Since input is given to Non-inverting terminal of op-amp) and output is provided as Vo. Also the device is powered from single voltage source of VCC.

We have the equation for the output Vo =Input voltage * Gain = Vi * A = Vi * (1+R1/R2)

For example:

Say R1 = 100, R2 = 10 and Input voltage Vi = 20mV

We will have Vo = 20m*(1+10)=220mV

With that we have realized the amplifier circuit of op-amp and in a similar way we use the device to design all other application circuits of op-amp.

-Used in Digital and Analog Electronics

-Used in Power Supplies and Mobile Chargers

-Used in Desktop PC and Motherboard

-Used in Uninterruptible Power Supplies

-Used in Mathematical Operations

-Used in Amplifiers

-Used in Oscillators

-Used in Voltage Comparators

-Used in Washers, Dryers, and Refrigerators

-Used in Programmable Logic Controllers

-Used in Measuring Instruments

-Used in Oscilloscope

-Used in Chemical Sensors

-Used in Gas Sensors

-Used in Weigh Scales

-Used in LCD&Digital TV

Texas Instruments Incorporated (TI) is an American technology company headquartered in Dallas, Texas, that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally. It is one of the top 10 semiconductor companies worldwide based on sales volume.The company's focus is on developing analog chips and embedded processors, which account for more than 80% of its revenue.TI also produces TI digital light processing technology and education technology products including calculators, microcontrollers and multi-core processors. 

Download datasheets and manufacturer documentation for Texas Instruments LM258P.