Single supply Op Amp

Other Hardware General Electronics
1

Hello,
I want to suggest me an op amp like Microchip MCP602.

Min Bandwidth: 2.8 Mhz
Min Channel: 2
Max offset current: a few pA
Max offset voltage: up to 2 mV

Thanks

2

Not enough information.

Rail to rail needed? Supply voltage range?

Do you mean offset current or bias current?

3

What's wrong with the MCP602?

4

MarkT:
Not enough information.

Rail to rail needed? Supply voltage range?

Do you mean offset current or bias current?

Min Bandwidth: 2.8 Mhz
Min Channel: 2
Max input offset current: a few pA
Max offset voltage: up to 2 mV
Rail to rail output: is needed
Max Supply Voltage: 5.5V

5

nobody can help me?...

6

Which of the Maxim, Microchip or Linear Technologies op amps comes closest to your specifications?

7

Have you looked at some of the Analog Devices low voltage devices, I've used the AD8656 which is
probably over speced for what you need, and isn't the cheapest, but they will have a selection chart somewhere
online.

Do you know about parametric search engines available on most major electronicss parts stockists websites?
You may be able to identify candidates that way.

8

MarkT:
Have you looked at some of the Analog Devices low voltage devices, I've used the AD8656 which is
probably over speced for what you need, and isn't the cheapest, but they will have a selection chart somewhere
online.

Do you know about parametric search engines available on most major electronicss parts stockists websites?
You may be able to identify candidates that way.

Thanks guys :slight_smile:

9

navab1362:
nobody can help me?...

How about the LM-358?

10

The LM358 is not upto the task. Its full-swing bandwidth is about 6kHz at 12V supply, 20kHz at
5V supply, and has essentially nothing useful above 100kHz

11

MarkT:
The LM358 is not upto the task. Its full-swing bandwidth is about 6kHz at 12V supply, 20kHz at
5V supply, and has essentially nothing useful above 100kHz

Oh, you're right. Note to self: Read the datasheet!

12

I assumed it was quite general purpose, till one day I tried using one to invert an 10V p2p 87kHz signal
and got basically small positive going pulses only! Was intending to drive a TDA2009 audio amp from it
in bridge-mode. Back to the trusty AD8656 (way over-spec'd, but doesn't bat an eyelid at 87kHz).