LMX2470SLEX National Semiconductor, LMX2470SLEX Datasheet - Page 29

• Manufacturer Part Number: LMX2470SLEX
• Description: IC PLL DELTA-SIGMA 24LAMUCSP
• Manufacturer: National Semiconductor
• Type: PLL Frequency Synthesizer, Delta Sigmar

Specifications of LMX2470SLEX

• Pll: Yes with Bypass
• Input: CMOS
• Output: CMOS
• Number Of Circuits: 1
• Ratio - Input:output: 3:3
• Differential - Input:output: Yes/No
• Frequency - Max: 2.6GHz
• Divider/multiplier: Yes/Yes
• Voltage - Supply: 2.25 V ~ 2.75 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-Laminate UTCSP
• Frequency-max: 2.6GHz
• For Use With: LMX2470EVAL - EVALUATION BOARD FOR LMX2470
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LMX2470SLEX; *LMX2470SLEX/NOPB; LMX2470SLEXCT

REGISTER
Programming Description
2.4 R3 REGISTER
2.4.1 IF_R[14:0] -- IF R Divider Value
For the IF R divider, the R value is determined by the IF_R[14:0] bits in the R3 register. The minimum value for IF_R is 3.
2.4.2 RF_CPG -- RF PLL Charge Pump Gain
This is used to control the magnitude of the RF PLL charge pump in steady state operation
R3
R Value
32767
...
3
23
0
22
0
1
.
RF_CPG[3:0]
RF_CPG[3:0]
21
0
1
.
10
12
13
14
15
11
0
1
2
3
4
5
6
7
8
9
20
DATA[19:0] ( Except for the RF_N Register, which is [22:0] )
0
1
.
19
18
0
1
.
17
(Continued)
0
1
.
16
15
0
1
.
14
0
1
29
.
13
IF_R[14:0]
IF_R[14:0]
12
0
1
.
RF Charge Pump Current (µA)
11
0
1
.
10
0
1
9
.
1000
1200
1300
1400
1500
1600
1100
100
200
300
400
500
600
700
800
900
8
0
1
.
7
6
0
1
.
5
4
0
1
.
C3
3
0
C2
1
1
2
1
.
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C1
1
0
1
1
.
C0
0
1