THS4551: THS4551IDGKT - Looking for Alternate

Hi Balakrishnan,

having no schematic there's no simple answer.

If input to -rail and output rail-to-rail capability is essential, then look here:

https://www.ti.com/amplifier-circuit/fully-differential/products.html#~p78=In%20to%20V-;Out&p2954=VSSOP

Otherwise look here:

https://www.ti.com/amplifier-circuit/fully-differential/products.html#p2954=VSSOP

Kai

The THS4551 was an upgrade to the THS4521 - so perhaps that can fit in. Later, the slower, but wider supply range THS4561 was done. 

There are non-TI options, offline discussion msteffes1@comcast.net

Thanks to Kai and Michael for the suggestions, please let us know Bala if you have concerns about these alternatives.

Best,

Sam

Hi Kai, 

Please see the below circuit. 

Regards,

Bala

Hi Michael, 

Thank you for your alternative suggestion., I will contact you through email. 

Regards,

Bala

Hi Sam,

I am Bala's colleague. We are looking for better or similar noise(Vn) and offset voltage (Vos).

Regards,

Rohit

Hi Michael,

I checked THS4521 and THS4561 both are not good in terms of Noise and Offset voltage if we compare with THS4551.

Hi Rohit,

what about the rail-to-rail requirements at the inputs and outputs of OPAmp?

Kai

Hi Kai,

Yes I need rail to rail input and output.

Regards,

Rohit

Hey Rohit, 

There are only a few that are RR input, and the THS4551 is not one of them. Most are RRout and negative rail input which is usually adequate, 

In TI, you might also look at the THP210 quite a bit slower, but good offset and noise. 

There are in fact others industrywide that are closer in speed. 

But are they P2P and footprint compatible?

yes, perhaps you should contact me. Required speed is a tough question, your app may not need any and the THP210 is the right way to go. But things like settling time and distortion need a lot of speed margin to get good results. 

Yes you are right, I will contact you.