參數(shù)資料
型號： TRF2050PW
廠商： TEXAS INSTRUMENTS INC
元件分類： PLL合成/DDS/VCOs
英文描述： PLL FREQUENCY SYNTHESIZER, 1200 MHz, PDSO20
封裝： PLASTIC, SO-20
文件頁數(shù)： 24/34頁
文件大?。?/td> 543K
代理商： TRF2050PW
TRF2050
LOW-VOLTAGE 1.2-GHz FRACTIONAL-N/INTEGER-N SYNTHESIZER
SLWS030E– JUNE 1996 – REVISED OCTOBER 2000
30
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
phase detectors (continued)
D
SET
Q
CLR
D
SET
Q
CLR
1
Reference Divider
/NR
Main or Auxiliary
Reference Divider
/N or /NR
VDDA
VSSA
Charge Pump
Output
REFIN
REFIN or AUXIN
Figure 25. Main and Auxiliary Phase Detector Circuit
charge-pump current plans
The TRF2050 uses internal band-gap references and external resistors to develop biasing reference currents
for the various charge pumps sections. Three terminals are designated for the external resistors: RN, RF, and
RA. Internal, programmable coefficients CN, CL, and CK are also used. Table 7 shows how the external resistors
are used to achieve desired charge-pump peak currents.
Table 7. Charge Pump Current Plans
PARAMETER
MODE
CONDITION
UNIT
Peak proportional, normal mode current PHP
PK
*NM +
18.75
RN
) 0.75
x
CN
256
Normal
RN in k
mA
Peak proportional, speed-up mode current
PHP
PK
*SM +
18.75
RN
) 0.75
x
CN
256
)
18.75
RN
) 0.75
x
CN
256
x2CL)1
Speed-up
RN in k
mA
Peak integral, speed-up mode current PHI
PK
*SM +
18.75
RN
) 0.75
x
CN
256
xCKx 2CL)1
Speed-up
RN in k
mA
Peak compensation, normal mode current CompPK +
30
RF
Normal
RF in k
A
Peak auxiliary current PHA
PK +
1.25
RA
x20
Normal
RA in k
mA
The compensation charge-pump current is a pulse-amplitude modulated with the contents of the fractional accumulator. See the section on Main
Divider – Fractional-N Sidebands and Compensation.
The average charge-pump current for the PHP, PHI, and PHA terminals is defined by:
I
AVG +
qerror
2
p
xI
PK
.
相關PDF資料
PDF描述
TRF2056PWR PLL FREQUENCY SYNTHESIZER, 1200 MHz, PDSO20
TRF4000 Pcs RX-mixer
TRF4002PWP 1850 MHz - 1910 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER
TRS-1300-1305-8310 TRIPLE COLOR LED ARRAY
TRS-1300-1311-8310 DUAL COLOR LED ARRAY
相關代理商/技術參數(shù)
參數(shù)描述
TRF2052 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-VOLTAGE 2-GHz SYNTHESIZER
TRF2052PW 功能描述:IC LV 2-GHZ SYNTH 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:- 標準包裝:2,000 系列:- 類型:PLL 頻率合成器 PLL:是 輸入:晶體 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/無 頻率 - 最大:1GHz 除法器/乘法器:是/無 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-LSSOP（0.175"，4.40mm 寬） 供應商設備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱:NJW1504V-TE1-NDNJW1504V-TE1TR
TRF2056 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-VOLTAGE 1,2-GHz FRACTIONAL-N/INTEGER-N SYNTHESIZER
TRF2056PW 制造商:Rochester Electronics LLC 功能描述:- Bulk
TRF2253PWR 制造商:Texas Instruments 功能描述:
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*