OPA2170

Phillip Karls

Other Parts Discussed in Thread: OPA2170, OPA192, OPA130, OPA172, OPA137

I'm observing that the OPA2170 has Input Differential Over-Voltage Protection Diodes. I do not see these mentioned in the datasheet anywhere.

Can someone confirm this?

I need an amp like this one (low noise, low power, wide supply range) that does not have these diodes.

Thanks.

over 10 years ago

0 Marek Lis over 10 years ago

TI__Guru 60610 points

Philip,

Yes, you are correct. OPAx170 as well as OPAx171 and OPAx172 have back-to-back input protection diodes-see below.

At the end of this year, we plan on introducing 2MHz bandwidth 36V CMOS op amp with no back-to-back input diodes - similar to 10MHz OPA192 currently available. In the meantime, you may consider 36V supply voltage JFET input OPA130 with no back-to-back input diodes.

0 Phillip Karls over 10 years ago in reply to Marek Lis

Prodigy 250 points

That information would be useful in the datasheet...

Are there options with lower power than the OPA130?

Thanks!

0 Marek Lis over 10 years ago in reply to Phillip Karls

TI__Guru 60610 points

Phillip,

I agree - that is why our latest OPA172 does include the diagram of the ESD/EOS input protection.

For the lower power, please see OPA137 with 1MHz bandwidth and typical IQ of 220uA. But remember that lower power means a higher input noise.

0 Phillip Karls over 10 years ago in reply to Marek Lis

Prodigy 250 points

Thanks, i'll take a look.

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