LM1458 PDF

Description. The LM/LMC series are dual general purpose operational amplifiers, having short circuits protected and require no external components. 11 Jul Today, I am going to elaborate you about Introduction to LM LM is basically a general purpose dual Operational Amplifier (Op-amp). The LM and the LM are general purpose dual op- erational amplifiers. The two amplifiers share a common bias network and power supply leads.

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However, there may be a solution to this. The current display is 2 LM bargraph. Post as a guest Name. The answer to your question is very simple, and it comes in 3 parts: Voltages are relative, they’re all differences between two points. You can do this with a couple of resistors acting as a potential divider. One such inexpensive single supply capable rail to rail op amp that should work is TLV Sign up using Email and Password.

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Your V- is connected to 0V. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy l1458 and cookie policyand that your continued use of the website is subject to these policies.


The reason for the buffer is because the Voltmeter sinks the source voltage too much.

Making a LM work as a Unity Gain buffer with an input of 0 to 12v output to a digital voltmeter. Make the K resistor connect to the GND in the diagram above. And then make your centre point of the resistors your 0V a 0V common. Note that lj1458 is an automotive application, not a lab setup. Most rail-to-rails work with rather lower voltages.

LM Dual Op Amp IC | NightFire Electronics LLC

Does that sound familiar? However in the end I decided to use a LM which is designed for a single sided power supply.

Actually, your selection is somewhat limited by your relatively high power supply voltage. Measure the current when throttle is connected to ground through an ammeter. In response to 1 Can you suggest a more suitable single rail Op Amp.

I tried to bias the input but it made little difference. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policy llm1458, and that your continued use of the website is subject to these policies.


The source resistance is about k, the Voltmeter input impedance is about k Ohms. The power supply is the 12volt battery, and this is by definition connected to ground as the. The key is recognising that the battery is 9 volts potential difference between the terminals, but you can share that 9 volts across two equal sized resistors to give 4.

In lm458 words, the output will only drive to within about 3 volts of the negative supply. It even has the same pinout as the LM I swapped ic’s with the same result.

V- of LM Make R a fairly large value so you’re not draining too much current from the supply. Adequate to graph the vehicle economy curve, the project purpose.

Previous answer is correct.

If you apply a negative voltage to V- pin 8 of -3V or below, then you should be able to get your output voltage to drop down to 0 volts. WhatRoughBeast has already given you an answer. Sign up using Facebook. There is no lm14558 to float the circuit other than by using a DC-DC converter.