參數(shù)資料
型號(hào)： 74HCT7046ADB
廠(chǎng)商： NXP SEMICONDUCTORS
元件分類(lèi)： PLL合成/DDS/VCOs
英文描述： PHASE LOCKED LOOP, PDSO16
封裝： PLASTIC, SSOP-16
文件頁(yè)數(shù)： 20/38頁(yè)
文件大小： 468K
代理商： 74HCT7046ADB
December 1990
27
Philips Semiconductors
Product specication
Phase-locked-loop with lock detector
74HC/HCT7046A
APPLICATION INFORMATION
This information is a guide for the approximation of values of external components to be used with the 74HC/HCT7046
in a phase-lock-loop system.
References should be made to Figs 27, 28 and 29 as indicated in the table.
Values of the selected components should be within the following ranges:
R1
between 3 k
and 300 k;
R2
between 3 k
and 300 k;
R1
+ R2 parallel value > 2.7 k;
C1
greater than 40 pF.
SUBJECT
PHASE
COMPARATOR
DESIGN CONSIDERATIONS
VCO frequency characteristic
VCO frequency
without extra
offset
PC1, PC2
With R2 =
∞ and R1 within the range 3 k< R1 < 300 k, the characteristics
of the VCO operation will be as shown in Fig. 23.
(Due to R1, C1 time constant a small offset remains when R2 =
∞.)
Fig. 23 Frequency characteristic of VCO operating without offset:
fo = centre frequency; 2fL = frequency lock range.
Selection of R1 and C1
PC1
Given fo, determine the values of R1 and C1 using Fig.27.
PC2
Given fmax and fo, determine the values of R1 and C1 using Fig.27,
use Fig.29 to obtain 2fL and then use this to calculate fmin.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
74HCT7046AD-T 功能描述:鎖相環(huán) - PLL PHASED-LOCKED LOOP W/LOCK DTCT RoHS:否 制造商:Silicon Labs 類(lèi)型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
74HCT7046AM96 制造商:Rochester Electronics LLC 功能描述:- Bulk
74HCT7046AN 制造商:NXP Semiconductors 功能描述:
74HCT7046AN,112 功能描述:鎖相環(huán) - PLL PHASE LOCKED LOOP W/LOCK DETECT RoHS:否 制造商:Silicon Labs 類(lèi)型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
74HCT7273(SMD) 制造商:MISCELLANEOUS 功能描述:
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