LMX2595: LMX2595 Supply Currents

Darrell Snader

Part Number: LMX2595

I would like to add some ferrite beads to the power supply inputs to the LMX2595 to isolate some of them. What are the individual supply currents on the LMX2595?

over 1 year ago

0 Noel Fung over 1 year ago

TI__Guru* 81340 points

Hi Darrell,

The current consumption of the device will change depending on register configuration, VCO frequency, charge pump output, etc. For an arbitrary typical configuration with 2050MHz out and 100MHz in, I find the following:

VccDIG: 63mA
VccCP: 26mA (charge pump set to 15mA effective gain)
VccBUF: 193mA (one output active - increase by about 92mA for two outputs active. Includes current through external pull-ups)
VccMASH: 18mA (3rd order, N=61.5)
VccVCO + VccVCO2: 130mA

0 Darrell Snader over 1 year ago in reply to Noel Fung

Prodigy 50 points

Thank you!

0 Darrell Snader over 1 year ago in reply to Noel Fung

Prodigy 50 points

Would you be able to give me the currents with the following settings?.

Freq: 9000MHZ

Ref: 50 MHz

N = 180

Direct VCO output

0 Noel Fung over 1 year ago in reply to Darrell Snader

TI__Guru* 81340 points

Hi Darrell,

I don't have the setup for this breakdown measurement anymore.

Based on TICS Pro's estimation, direct VCO output will be 30mA less than divided output. I think we will see this current change in VccVCO+VccVCO2 and VccBUF pin.

Clock & timing

Clock & timing forum

LMX2595: LMX2595 Supply Currents