#Op amp offset null potentiometer full#
Pin 8 has no connection with the internal circuitry of the op-amp, it is made for full fill the standard 8-pin packaged IC. Pin 1 and pin 5 is offset null pins, a potentiometer (typical value of 10k) is connected between these terminals to set the output to be zero. It has two inputs (i.e, one is inverting input pin 2 and another is non inverting input pin 3). Pin 7 and pin 4 is used as supply pins, at pin 7 positive supply is to be connected and at pin 4 negative supply is to be connected. Thirdly, the suffix indicates the type of packages. (ii) the last letter indicates the operating temperature of a particular op-amp). Secondly, the designator which tells us two things ( (i) three-digit number identifies the type of op-amp. For egįirstly, the prefix identifies a particular manufacturer. Many op-amps are identified by using a seven-character ID code. How can we identify 741 op-amps is manufactured by a particular manufacturer. Since nowadays many manufacturers are producing 741 op-amps. IC IDENTIFICATION AND PIN CONFIGURATION OF IC 741
uA741 is also known as second generation op-amp. Unlike uA709, it has no latch-up problem, protected against short circuit, and frequency stability. In 1968, Fairchild introduced uA741 an internal compensated property. The disadvantage is: there is no short circuit protection, latch-up problem, frequency compensation problem which require external components(i.e, 2 capacitors and a resistor). It has several disadvantages, which requires external components for its protection. In 1965, Fairchild introduced uA709 which is a first generation op-amp. OP-amp is basically a configuration of transistors with a suitable value of resistors. It is very high gain amplifier consisting of differential amplifiers, consist of the level translator and an output stage. It can also be used for amplifying AC as well as DC signals, the word AMPLIFIER refers to increasing the strength of a signal. With the addition of suitable external components, the modern day’s op-amps can be used for a variety of application as mentioned above. It is a device originally designed for performing a mathematical operation (i.e, addition, subtraction, integration and differentiation) and to deal with analog signals. If you are thinking about mathematical operations then you are right. I hope that this article will provide you the basic knowledge about the operational amplifier.Īs its name implies OPERATIONAL AMPLIFIER, what will you think about the word OPERATIONAL?. Operational amplifiers are widely used in our audio amplifiers, inside computers (i.e, DAC and ADC etc), instrumentational amplifier (i.e, used in industries for sensing), comparators, oscillators, filters, log and Antilog amplifier, V-I and I-V converters, integrators, differentiators, inside 555 timers wave generators etc.ĭo you ever think what basically is inside an op-amp (IC 741)?, how it is configured for performing various functions as mentioned above and what are its characteristics.
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