LM318: Bal, Comp and Bal&Comp connections to use LM318 as fast switching buffer

Chukka Ashok Kumar

Part Number: LM318
Other Parts Discussed in Thread: , THS4021, THS3491, THS3001, OPA810

To use LM318 as a fast switching Buffer, what are the recommended connections on Bal, Comp, and Bal&Comp pins? is it fine to not doing any connections to these pins?

please suggest the best suitable alternative part for LM318, in the point of electrical features.

over 3 years ago

0 kai klaas69 over 3 years ago

Guru 140200 points

Hi Chukka,

give some details on your buffer, like supply voltage, gain, bandwidth, load, input signal, etc. And give some details on your application.

Kai

0 Ron Michallick over 3 years ago

TI__Guru**** 157236 points

Hello Chukka,

LM318 is over 45 years old. There was not a great selection of op amps back then. Check out LM318-N data sheet as it has a lot more information. See figures 37, 38, & 41

Please provide the details that Kai requested; I'm sure we have a better device to recommend .

0 Chukka Ashok Kumar over 3 years ago in reply to kai klaas69

Prodigy 30 points

Hi Kai,

Input to the circuit is 1.25V DC and high frequency (~20Mhz) noise. we want to find the peak amplitude of the AC signal (expecting in mV).

Please suggest the right combination of op-amps to use for buffer and amplification.

0 Ron Michallick over 3 years ago in reply to Chukka Ashok Kumar

TI__Guru**** 157236 points

Chukka,

I added high speed amplifier support to this thread. They should reply within 24 hours.

+1 Sima Jalaleddine over 3 years ago in reply to Chukka Ashok Kumar

TI__Mastermind 26665 points

Hello Chukka,

For second stage at 20V/V and analyzing signal at 20MHz, I would suggest switching out the OPA810 with a higher GBW part such as THS4021, THS3001, or THS3491. Here is a link to compare devices.

Thank you,

Sima

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LM318: Bal, Comp and Bal&Comp connections to use LM318 as fast switching buffer