LMK04803B / current consumption calculation

Ryuji

Guru 20090 points

Hello,

I calculated below conditions current consumption by LMK04800 datasheet page 121~121.

Is below my calculation correct ?

If not, please let me know correct calculation.

Dual loop mode

2 LVDS with 250MHz (CLKout0 and CLKout1)

1 LVDS with 2GHz (CLKout2)

No other features enable

Core : 140mA

Base Clock Distribution ; 17.3mA

Clock Divider / Digital Delay : 25.5mA * 2 = 51mA

LVDS : 14.3mA *3 = 42.9mA

-----------------------------------------------------

Total : 251.2mA

Best Regards,

Ryuji Asaka

over 12 years ago

0 Gabe Ayala over 12 years ago

TI__Genius 10320 points

Hi Ryuji,

Your calculations look correct except they did not account for the CLKout buffer current consumption. This adds an additional 5.6mA of current draw (2 * 2.8mA per buffer) for an estimated total of 256.8mA.

-Gabe

0 Ryuji over 12 years ago in reply to Gabe Ayala

Guru 20090 points

Hello Gabe san,

Thank you very much. I understood.

Best Regards,

Ryuji Asaka

Clock & timing

Clock & timing forum

LMK04803B / current consumption calculation