參數(shù)資料
型號(hào)： AD9854AST
廠商： ANALOG DEVICES INC
元件分類： XO, clock
英文描述： CMOS 300 MHz Quadrature Complete-DDS
中文描述： PLL FREQUENCY SYNTHESIZER, 200 MHz, PQFP80
封裝： MS-026BEC, LQFP-80
文件頁(yè)數(shù)： 9/44頁(yè)
文件大小： 433K
代理商： AD9854AST
AD9854
–9–
REV. 0
Figures 8–11 show the trade-off in elevated noise floor, increased phase noise, and occasional discrete spurious energy when the
internal REFCLK Multiplier circuit is engaged. Plots with wide (1 MHz) and narrow (50 kHz) spans are shown.
0
CENTER 39.1MHz
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
100kHz/
SPAN 1MHz
Figure 8. Narrowband SFDR, 39.1 MHz, 1 MHz BW,
300 MHz EXTCLK with REFCLK Multiply Bypassed
0
CENTER 39.1MHz
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
5kHz/
SPAN 50kHz
Figure 9. Narrowband SFDR, 39.1 MHz, 50 kHz BW,
300 MHz EXTCLK with REFCLK Multiplier Bypassed
0
CENTER 39.1MHz
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
100kHz/
SPAN 1MHz
Figure 10. Narrowband SFDR, 39.1 MHz, 1 MHz BW,
30 MHz EXTCLK with REFCLK Multiply = 10
×
0
CENTER 39.1MHz
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
5kHz/
SPAN 50kHz
Figure 11. Narrowband SFDR, 39.1 MHz, 50 kHz BW,
30 MHz EXTCLK/REFCLK Multiplier = 10
×
Figures 12 and 13 show the slight increase in noise floor both with and without the PLL when slower clock speeds are used to generate
the same fundamental frequency, that is, with a 100 MHz clock as opposed to a 300 MHz clock in Figures 10 and 12.
0
CENTER 39.1MHz
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
5kHz/
SPAN 50kHz
Figure 12. Narrowband SFDR, 39.1 MHz, 50 kHz BW,
100 MHz EXTCLK with REFCLK Multiplier Bypassed
0
CENTER 39.1MHz
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
5kHz/
SPAN 50kHz
Figure 13. Narrowband SFDR, 39.1 MHz, 50 kHz BW,
10 MHz EXTCLK with REFCLK Multiplier = 10
×
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD9854ASTZ 功能描述:IC DDS QUADRATURE CMOS 80-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數(shù)字合成 (DDS) 系列:- 產(chǎn)品變化通告:Product Discontinuance 27/Oct/2011 標(biāo)準(zhǔn)包裝:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 調(diào)節(jié)字寬（位）:32 b 電源電壓:2.97 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
AD9854ASVZ 制造商:Analog Devices 功能描述:CMOS 300 MSPS QUADRATURE COMPLETE DDS 制造商:Analog Devices 功能描述:CMOS 300 MSPS QUADRATURE COMPLETE DDS - Trays 制造商:Analog Devices 功能描述:SYNTHESIZER 制造商:Analog Devices 功能描述:Complete DDS Quadrature 300MSPS TQFP80
AD9854PCB 制造商:AD 制造商全稱:Analog Devices 功能描述:CMOS 300 MSPS Quadrature Complete DDS
AD9856 制造商:AD 制造商全稱:Analog Devices 功能描述:CMOS 200 MHz Quadrature Digital Upconverter
AD9856/PCB 制造商:Analog Devices 功能描述:Evaluation Board For Digital Up Converter 56 Pin LFCSP Ep 制造商:Analog Devices 功能描述:DGTL UP CNVRTR 56LFCSP - Bulk
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