LMX2582: Frequency is not generated correctly.

Hi Dhruv,

What is the reference clock frequency?

122.88 MHz

Hi Dhruv,

I loaded your configuration to TICS Pro, looks like you did not have the correct configuration. Please use TICS Pro to generate the desired configuration and cross check the register values with your own software.

Hi Noel,

I have used the TICS Pro to generate the configurations and I configured the following register values but still I am not able to generate the frequency of 3.61GHz instead a frequency of 3.63 GHz is being generated.

40 : 77
3e : 0
3d : 1
3b : 0
30 : 3fc
2f : 8cf
2e : fa1
2d : 83e8
2c : a
2b : 0
2a : 0
29 : 4240
28 : f
27 : 8204
26 : 1c
25 : 4000
24 : 11
23 : 1b
22 : c3ea
21 : 2a0a
20 : 210a
1f : 401
1e : 34
1d : 84
1c : 2924
19 : 0
18 : 509
17 : 8842
16 : 2300
14 : 12c
13 : 965
e : 18c
d : 4000
c : 7001
b : 18
a : 10d8
9 : 302
8 : 1084
7 : 28b2
4 : 1943
2 : 500
1 : 808
0 : 2218

Hi Dhruv,

Could you provide a screen shot of your TICS Pro configuration?

Hi Dhruv,

Please try this configuration, make sure your programming sequence is from R64 to R0. 

This gave me a better result than before. Can you tell me the reason for that? 

Hi Noel,

I want to generate a frequency over a range of 700-MHz to 4500 MHz. So can I keep the same configurations for all the frequencies?