OPA355: OPA355: OPA355 Enable pin problem

YZ Y

Part Number: OPA355

Tool/software:

Hi there, The power supply setting for OPA355 is ±1.8V. What should be the logic level for controlling the enable pin,
I see that the low level is less than 0.8V, and the high level should be greater than 2V. When using a split-supply, the enable and disable voltage levels are referenced to V–.

So, does this mean the low level should be less than -1V and the high level should be greater than 0.2V?

How should I set it? For example, can I use 3.3V for the high level and 0V for the low level? Thanks

2 months ago

0 Vikas Jeevannavar 2 months ago

TI__Expert 3015 points

Hi YZ Y,

Yes. you are correct. The voltages mentioned are referenced to V-. So, in your case, low level should be less than -1V and high level is greater than 0.2V.

Thanks
Vikas J

0 YZ Y 2 months ago in reply to Vikas Jeevannavar

Prodigy 30 points

How can I achieve such a level? Is there any recommended scheme for digital control output of high and low levels? Thank you

+1 Vikas Jeevannavar 2 months ago in reply to YZ Y

TI__Expert 3015 points

Hi YZ Y,

You can use a comparator or voltage translator to achieve the required digital control. The design will depend on digital control voltage HIGH and LOW levels.

Thanks
Vikas J

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OPA355: OPA355: OPA355 Enable pin problem