Scribd
Upload
70 views18 pages

Op-Amp Datasheet & Configurations

This document discusses interpreting op-amp datasheets and characteristics of operational amplifiers. It describes the key information found on datasheets such as maximum ratings, electrical parameters, and performance curves. It then outlines the ideal characteristics of an op-amp including infinite gain and zero input/output resistance. The equivalent circuit of a real op-amp is shown along with the ideal voltage transfer curve. Finally, it discusses open-loop op-amp configurations including differential, inverting, and non-inverting amplifiers and why they are not used in linear applications due to saturation issues.

Uploaded by

Nirav Patel
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
70 views18 pages

Op-Amp Datasheet & Configurations

This document discusses interpreting op-amp datasheets and characteristics of operational amplifiers. It describes the key information found on datasheets such as maximum ratings, electrical parameters, and performance curves. It then outlines the ideal characteristics of an op-amp including infinite gain and zero input/output resistance. The equivalent circuit of a real op-amp is shown along with the ideal voltage transfer curve. Finally, it discusses open-loop op-amp configurations including differential, inverting, and non-inverting amplifiers and why they are not used in linear applications due to saturation issues.

Uploaded by

Nirav Patel
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 18

Interpretation Of Data Sheets And

Characteristics Of An Op-amp

Lecture-2
N. D. Patel
Outline
• Interpreting datasheet
• Ideal op-amp
• Equivalent circuit of an op-amp
• Ideal voltage transfer curve
• Open-loop op-amp configurations
Interpreting Datasheet
• Manufacturers supply data sheet for ICs,
provide wealth of information: absolute
maximum ratings, intended applications.
electrical characteristics, performance
limitations, pin diagrams, equivalent circuits of
devices, and, more
• To get most use out of these data sheets, must
be able to interpret properly information
presented in them
General Information Found On Data Sheets

• Top of data sheet is device number and brief description of basic


type of device
• General description is given that include construction process of
device, intended applications, and list of main features
• Absolute maximum ratings for proper operation of device then
specified
• Pin configuration, package type, and order information are given
• Internal schematic diagram is shown
• Electrical characteristics and parameter values under specific
conditions are also given
• Typical performance curves such as voltage gain versus supply
voltage are provided
• Finally typical applications and test circuits for device are illustrated
Electrical Parameters
Electrical Parameters
Electrical Parameters
Ideal Op-amp
• Infinite voltage gain A
• Infinite input resistance Ri so almost any signal source can
drive it and there is no loading of preceding stage
• Zero o/p resistance Ro so o/p can drive infinite number of
other devices
• Zero o/p voltage when i/p voltage is zero
• Infinite bandwidth so that any freq. signal from 0 to infinite
Hz can be amplified without attenuation
• Infinite common-mode rejection ratio so o/p common-mode
noise voltage is zero
• Infinite slew rate so o/p voltage changes occur
simultaneously with i/p voltage changes
Equivalent Circuit Of An Op-amp
Equivalent Circuit Of An Op-amp
Ideal Voltage Transfer Curve
Open Loop Op-amp
Configuration
Open Loop Op-amp Configuration
• Three open-loop op-amp configurations:
– Differential amplifier
– Inverting amplifier
– Noninverting amplifier
Open-loop Differential Amplifier

v1 = vin1 and v2 = vin2

vo = Ad (vin1 – vin2 )
Inverting Amplifier

v1= 0, v2 = vin.
vo = -Ad vin
Non Inverting Amplifier

v1 = +vin , v2 = 0
vo = +Ad vin
Open Loop Op-amp Configuration
• In all three open-loop configuration any input
signal that is only slightly greater than zero
drives o/p to saturation level, results from very
high gain of op-amp
• When operated open-loop,o/p of op-amp is
negative or positive saturation or switched
between positive and negative saturation levels
• So, open-loop op-amp configuration are not
used in linear applications
keep silence

You might also like