LM2901AV-Q1: Maximum output current

Stefano Scremin

Intellectual 440 points

Part Number: LM2901AV-Q1

Dear All,

I've a question about maximum output current (per comparator) of LM2901AV-Q1.

In datasheet it's reported that the "Recommended max output current" is 4mA. What does this means?

Can't I use it at 6-7mA? What happens in this case?

Thanks in advance for reply.

Best Regards

Stefano

over 4 years ago

0 Chuck Sins over 4 years ago

TI__Mastermind 24520 points

Stefano

You’re right. That is slightly confusing but nothing terrible will happen if the sink current increases above 4mA. The abs max table has the limit as 20mA. The reason it is recommended at 4mA is related to the VOL spec in the EC table. VOL is specified at 4mA but going higher just means that the VOL level will elevate a bit. In general I recommend pull-up resistance in the 10k range but if your application requires something lower that is ok.

Chuck

0 Stefano Scremin over 4 years ago in reply to Chuck Sins

Intellectual 440 points

Dear Chuck,

thank you for your reply.

So...can I use it with output sink current about 10mA without particular problems?

For the relative Vol, is it sufficient to look at the tables that link Iout to Vout?

Best Regards

Stefano

0 Chuck Sins over 4 years ago in reply to Stefano Scremin

TI__Mastermind 24520 points

Stefano

You should not expect to have any problem sinking 10mA.

From the curve in Figure 3 on page 6, you should expect a typical VOL of about 0.2V when sinking 10mA.

Chuck

0 Stefano Scremin over 4 years ago in reply to Chuck Sins

Intellectual 440 points

Thank you very much!

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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LM2901AV-Q1: Maximum output current