Hi

I am trying to use IC HA2520 as Gain of Ten Amplifier for my Waveform Generator circuit. Expected output after amplification is 5V peak-peak.
when I connected this IC to my circuit the output doesn't show up at the output pin.

I have connected my circuit as follows

Pin2 - Input
pin3 - Analog Gnd
pin4 - (-18V)
pin7 - (+18V)

Output pin 6.

I am using 1K for input at pin2.

Pin2 and pin 6 are connected to 10K Pot.

100PF disc is connected to pin 6 and Gnd.

This circuit works well for IC LF351

It is not working for HA2520.

can somebody tel me what I should do.

What is the purpose of other pins 1,5 and 8

Please post a circuit diagram

I am desperate to make this circuit work

I have attached the Datasheet.

Please help me.

 

Why don't you post a schematic of what you have? A picture is worth a thousand words...

 

The op amp is not internally compensated, and is intended for high frequency operation - up to 20 MHz. It will not substitute in for an LF351. What is the range of frequencies you need to cover?

 

Thanks for your reply.

Range will be up to 10MHZ

Regards
Marims

 

Why don't you post a schematic of what you have? A picture is worth a thousand words...

my schematic is as in the attachment.

Thank U

 

Hi beenthere

I understand that I need to add resistors and capacitors for external
compensation.I will be grateful to you if you could post me a schematic /
suggest me a site.

regards
Mariappan

 

Have you got a data sheet for the op amp? It usually gives common configurations.

 

Usualy a 500 Ω to gnd from pin 3 is a good idea for ballacing the input . remove any caps fron the output. add a 180 and .00560 pfd to gnd as compensation. I still believe that a better amplifier can be found. try maxim in that kind of pachage 500 mhz is possible.