LMK1C1104EVM: Output current capacity

PAB

Part Number: LMK1C1104EVM
Other Parts Discussed in Thread: LMK1C1104

Tool/software:

Hi! Would you be so kind to indicate each output maximum continuous output current (Iout)?

I'm not talking about Absolute Maximum Ratings, but current levels safe to operate with (ZL=50Ohms).

Greetings and thanks for your time.

0 PAB over 1 year ago

Part Number: LMK1C1104

I came across this solution. It would be great if you guys can check it out:

Iout= (Vdd*Tt*C)/t

According to LMK1C1104 datasheet:

Vdd = 3.3Vcc
Tt = 0,6 (20/80%)
C = 5pF
t = 0,7ns

Iout = (3.3V*0.6*5pF)/0.7ns = 14,15mA

But, also according to the datasheet, absolute maximum continuous output current is 50mA; so 4x14,15mA=56,6mA>50mA.

I'll be working with a 10MHz frequency.

I would appreciate your help.

+1 William Pfennigwerth over 1 year ago in reply to PAB

Hello,

The output current limit is 50mA per output channel.

After a quick simulation with a 50 ohm termination I saw around 20 mA from one output, so it should be in that range.

Regards,

Will

0 PAB over 1 year ago in reply to William Pfennigwerth

Hi William. Thanks for your help.

How did you manage to simulate this part? There's no spice library available to my knowledge.

Best regards,

PAB

+1 William Pfennigwerth over 1 year ago in reply to PAB

PAB,

I simulated in Hyperlynx using the IBIS model found on the product page.

Regards,

Will

0 PAB over 1 year ago in reply to William Pfennigwerth

Thanks Will!

Regards,

PAB

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