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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 |
| 文件頁數(shù)： | 15/18頁 |
| 文件大?。?/td> | 184K |
| 代理商： | LMX2502LQX1635 |
Programming Description
(Continued)
R3 REGISTER
The R3 register address bits (R3 [2:0]) are “011”.
Register R3 contains the controls for the phase lock bandwidth controls (BW_DUR, BW_CRL, and BW_EN). The duration of the
digital controller portion of the bandwidth control is set by BW_DUR [1:0]. The minimum time set with 00 and increasing durations
to the maximum value set with 11. BW_CRL [1:0] sets the phase offset criterion for the bandwidth controller. Once the phase
offset between the reference clock and the divided VCO signal are within the set criterion, the bandwidth control stops. The
maximum phase offset is set with 00 and decreases to the minimum value set with 11. BW_EN enables the bandwidth control in
the locking state.
The VCO dynamic current is also controlled in register R3 with VCO_CUR [1:0]. The minimum value corresponds to 00 and
increases to a maximum value set at 11.
R3 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
R3
(Default)
BW_
DUR
[1:0]
BW_
CRL
[1:0]
BW_
EN
1
0
1
1
1
1
0
1
0
0
0
1
1
0
VCO_
CUR
[1:0]
0
1
Name
BW_DUR [1:0]
Functions
Bandwidth Duration
00 = Minimum value (Recommended)
01 =
10 =
11 = Maximum value
Bandwidth Control
00 = Maximum phase offset (Recommended)
01 =
10 =
11 = Minimum phase offset
Bandwidth Enable
0 = Disable
1 = Enable (Recommended)
VCO Dynamic Current
00 = Minimum value
01 =
10 =
11 = Maximum value (Recommended)
BW_CRL [1:0]
BW_EN
VCO_CUR [1:0]
L
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2505 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinu Dual Frequency Synthesizer System with Integrated VCOs |
| LMX25051321EVAL/NOPB | 功能描述:EVALUATION BOARD FOR LMX25051321 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
| LMX2505LQ1321 | 制造商:Texas Instruments 功能描述:PLL VCO CDMA SMD 2505 LLP-28 |
| LMX2505LQ1321/NOPB | 功能描述:IC FREQ SYNTH DUAL W/VCO 28LLP RoHS:是 類別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:100 系列:* |
| LMX2505LQX1321 | 功能描述:IC SYNTHESIZER PLL VCO 28-LLP RoHS:是 類別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:100 系列:* |
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