參數(shù)資料
型號(hào): LMX2502LQX1635
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: XO, clock
英文描述: PLLatinum⑩ Frequency Synthesizer System with Integrated VCO
中文描述: PLL FREQUENCY SYNTHESIZER, 19.68 MHz, QCC28
封裝: 5 X 5 MM, 0.75 MM HEIGHT, LLP-28
文件頁(yè)數(shù): 14/18頁(yè)
文件大?。?/td> 184K
代理商: LMX2502LQX1635
Programming Description
(Continued)
R2 REGISTER
The R2 Register address bits (R2 [1:0]) are “10”.
The IF_CUR [1:0] bits program the IF charge-pump current. Considering the external IF VCO and loop filter, the user can select
the amount of IF charge pump current to be 100 μA, 200 μA, 300 μA or 800 μA.
R2 REGISTER
R
MSB
23
SHIFT REGISTER BIT LOCATION
16
15
14
13
Data Field
LSB
0
22
21
20
19
18
17
12
11
10
9
8
7
6
5
4
3
2
1
Address
Field
1
0
R2
(Default)
IF_
CUR[1:0]
0
0
1
0
0
1
1
1
0
1
1
0
1
0
1
0
0
0
1
0
Name
IF_CUR [1:0]
Functions
IF Charge Pump Current
00 = 100 μA
01 = 200 μA
10 = 300 μA
11 = 800 μA
L
www.national.com
14
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