OPA2991-Q1: Slew rate and GBW values of OPA2991-Q1 over full operating temperature range

Manoj Turpati

Part Number: OPA2991-Q1

Hello TI,

I am writing this to request some missing information from datasheet of OPA2991-Q1. As shown in the below snap shot, datasheet provides the values(typical) of Slew rate and Gain Bandwidth product only at an ambient temperature of 25degC. Could you please provide Min and Max values for the same by considering full operating temperature range of the device ?

Best Regards,

Manoj Turpati

11 months ago

0 Gerasimos Madalvanos 11 months ago

TI__Mastermind 29046 points

Hey Manoj,

In the TI precision labs video on bandwidth it is discussed that the bandwidth is dependent on components that are not manufactured precisely in silicon. Therefore there can be a significant variance. Over process, there can be a +/- 30% variation, and over the operating temperature of the device, another +/- 30%. We do not provide tested limits for these specifications as this testing these parameters would make the device very expensive.

Best.
Jerry

0 Manoj Turpati 11 months ago in reply to Gerasimos Madalvanos

Prodigy 240 points

Hello Jerry,

Thanks for the response ! will it be same for the Slew rate as well ?

Best Regards,

Manoj.

0 Gerasimos Madalvanos 11 months ago in reply to Manoj Turpati

TI__Mastermind 29046 points

Hey Manoj,

I believe it should, as slew rate is dependent on how fast the amplifier can charge the Miller compensation capacitor. This is the component that can see the large variance. It is also worth noting that the slew rate of this device will be different based on how large of an input voltage differential is applied. A more in-depth explanation of this can be found at the below app note.

https://www.ti.com/lit/an/sloa332/sloa332.pdf

Best,
Jerry

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OPA2991-Q1: Slew rate and GBW values of OPA2991-Q1 over full operating temperature range