TLV272: Open loop gain of TLV272

Wendy Wang1

Genius 12470 points

Part Number: TLV272
Other Parts Discussed in Thread: TLV9152, TLV2172

Hi team,

What is the Open loop gain of TLV272? I didn't find it in the datasheet. Thanks!

Thanks & best regards,

Wendy

over 2 years ago

0 Michael Steffes over 2 years ago

Guru 48185 points

not really intended for new designs and apparently no TINA model - I would stay away from this device,

0 Caro Walter over 2 years ago in reply to Michael Steffes

TI__Mastermind 18617 points

Hello Wendy,

I agree with Michael in changing to the TLV9152 for the design.
As for your question, the open loop gain is Figure 12 of the datasheet:

All the best,
Carolina

0 Wendy Wang1 over 2 years ago in reply to Caro Walter

TI__Genius 12470 points

Hi Michael, Carolina,

Got it. Besides TLV9152, is there any other part number of operation amplifier you think more suitable? Generally, lower input bias current compared to TLV272 is better, no other specific requirements.

Thanks a lot!

Thanks & best regards,

Wendy

0 Robert Clifton56 over 2 years ago in reply to Wendy Wang1

TI__Mastermind 22440 points

Hi Wendy,

If they really only care about input bias, I would recommend taking a look at the TLV2172 which has a pretty low typical bias value for the voltage range it covers!

Let me know if this helps!

Best Regards,

Robert Clifton

0 Wendy Wang1 over 2 years ago in reply to Robert Clifton56

TI__Genius 12470 points

Hi Robert,

Besides operation frequency, any other factors have negative impacts on open loop gain decrease?

From the figure of TLV272, maybe not too much improvements by upgrading to TLV9152 & TLV2172. My customer uses it as voltage follower to drive cable shields.

Thanks & best regards,

Wendy

0 Robert Clifton56 over 2 years ago in reply to Wendy Wang1

TI__Mastermind 22440 points

Hi Wendy,

The other factor that the customer/user would want to verify before choosing an alternative part would be to look at the stability of the amplifier in the system! Verifying the load and whether the alternative op-amps would be stable under those conditions is key!

Best Regards,

Robert Clifton

0 Wendy Wang1 over 2 years ago in reply to Robert Clifton56

TI__Genius 12470 points

Hi Robert,

Thank you!

As shown in this figure, besides operation frequency, any other factors have negative impacts on open loop gain decrease?

Thanks & best regards,

Wendy

0 Robert Clifton56 over 2 years ago in reply to Wendy Wang1

TI__Mastermind 22440 points

Hi Wendy,

I don't see any other factors that would have negative impacts other than the ones that you mentioned for a decrease in open loop gain.

Best Regards,

Robert Clifton

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TLV272: Open loop gain of TLV272