SNAS824B October 2021 – June 2022 LMX2571-EP
PRODUCTION DATA
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 0 | 0 | CP_IUP | CP_GAIN | 0 | 1 | 1 | 1 | 0 | 0 | |||||
R/W-0h | R/W-10h | R/W-0h | R/W-1Ch |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
BIT | FIELD | TYPE | RESET | DESCRIPTION |
---|---|---|---|---|
15-13 | R/W | 0h | Program 0h to this field. | |
12-8 | CP_IUP | R/W | 10h | Set the base
charge pump current for internal VCO in synthesizer mode
operation. The total base charge pump current is equal to CP_IDN
+ CP_IUP. CP_IDN must be equal to CP_IUP. |
7-6 | CP_GAIN | R/W | 0h | Set the
multiplication factor to the base charge pump current for
internal VCO in synthesizer mode operation. For example, if the
gain here is 2x and if the total base charge pump current
(CP_IDN + CP_IUP) is 2.5 mA, then the final charge pump current
applied to the loop filter is 5 mA. The gain values are not
precise. They are provided as a quick way to boost the total
charge pump current for debug purposes or specific
applications. |
5-0 | R/W | 1Ch | Program 1Ch to this field. |