Datasheet

LMX2541SQ2060E, LMX2541SQ2380E
LMX2541SQ2690E, LMX2541SQ3030E
LMX2541SQ3320E, LMX2541SQ3740E
SNOSB31I –JULY 2009–REVISED FEBRUARY 2013 www.ti.com
VCO_DIV VCO Output Divide Comments
4 Divide by 4
Extra programming is required for divide by 4 and divide by 5 only. Refer to the
Functional Description for more details.
5 Divide by 5
6 Divide by 6
... ...
62 Divide by 62
63 Divide by 63
R3_LF[2:0] -- Value for Internal Loop Filter Resistor R3
This word controls the state of the internal loop filter resistor R3_LF when the device is in Full Chip Mode and
Fastlock is not active.
R3_LF Value R3 Resistor During Fastlock (kΩ)
0 Low ( 200 Ω )
1 1
2 2
3 4
4 16
5-7 Reserved
R4_LF[2:0] -- Value for Internal Loop Filter Resistor R4
This word controls the state of the internal loop filter resistor R4_LF when the device is in Full Chip Mode and
Fastlock is not active.
R4_LF Value R3 Resistor During Fastlock (kΩ)
0 Low ( 200 Ω )
1 1
2 2
3 4
4 16
5-7 Reserved
C3_LF[3:0] -- Value for C3 in the Internal Loop Filter
This word controls the state of the internal loop filter resistor C3_LF when the device is Full Chip Mode.
C3_LF C3 (pF)
0 0
1 1
2 5
3 6
4 10
5 11
6 15
7 16
8 20
9 21
10 25
11 26
12 30
13 31
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Product Folder Links: LMX2541SQ2060E LMX2541SQ2380E LMX2541SQ2690E LMX2541SQ3030E
LMX2541SQ3320E LMX2541SQ3740E