- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375249 > AD9854ASQ (ANALOG DEVICES INC) CMOS 300 MHz Quadrature Complete-DDS PDF資料下載
參數(shù)資料
| 型號： | AD9854ASQ |
| 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, 30 MHz, PQFP80 |
| 封裝： | MS-026-BEC, LQFP-80 |
| 文件頁數(shù)： | 33/44頁 |
| 文件大小： | 433K |
| 代理商： | AD9854ASQ |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁當(dāng)前第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
AD9854
–33–
REV. 0
FREQUENCY – MHz
1400
20
S
1200
1000
800
600
400
200
0
60
100
140
180
220
260
300
ALL CIRCUITS ENABLED
BASIC CONFIGURATION
Figure 57a. Current Consumption vs. Clock Frequency
Figure 57a shows the supply current consumed by the AD9854
over a range of frequencies for two possible configurations:
all
circuits enabled
means the output scaling multipliers, the inverse
sinc filter, the Q DAC, and the on-board comparator are all en-
abled.
Basic configuration
means the output scaling multipliers,
the inverse sinc filter, the Q DAC, and the on-board comparator
are all disabled.
FREQUENCY – MHz
450
1
S
400
350
300
250
200
150
0
2
3
4
5
6
7
8
100
50
Q DAC
500
INVERSE SINC FILTER
OUTPUT SCALING
MULTIPLIERS
COMPARATOR
Figure 57b. Current Consumption by Function vs. Clock
Frequency
Figure 57b shows the approximate current consumed by each of
four functions.
EVALUATION OF OPERATING CONDITIONS
The first step in applying the AD9854 is to select the internal
clock frequency. Clock frequency selections above 200 MHz
will require the thermally-enhanced package (AD9854ASQ);
clock frequency selections of 200 MHz and below may allow
the user to use the standard plastic surface-mount package, but
more information will be needed to make that determination.
The second step is to determine the maximum required operating
temperature for the AD9854 in the given application. Subtract
this value from 150
°
C, which is the maximum junction tem-
perature allowed for the AD9854. For the extended industrial
temperature range of 85
°
C, the result will be 65
°
C. This is the
maximum rise in temperature that the junction may experience
due to power dissipation.
The third step is to divide this maximum rise number by the
thermal impedance, to arrive at the maximum power dissipation
allowed for the application. For the example so far, 65
°
C divided
by both versions of the AD9854 package’s thermal impedances
of 38
°
C/W and 16
°
C/W, yields a total power dissipation limit
of 1.7 W and 4.1 W (respectively). This means that for a 3.3 V
nominal power supply voltage, the current consumed by the device
under full operating conditions must not exceed 515 mA in the
standard plastic package and 1242 mA in the thermally-enhanced
package. The total set of enabled functions and operating condi-
tions of the AD9854 application must support these current
consumption limits.
Figures 57a and Figure 57b may be used to determine the
suitability of a given AD9854 application vs. power dissipation
requirements. These graphs assume that the AD9854 device will
be soldered to a multilayer PCB per the recommended best
manufacturing practices and procedures for the given package
type. This ensures that the specified thermal impedance spec-
ifications will be achieved.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD9854AST | CMOS 300 MHz Quadrature Complete-DDS |
| AD9856AST | CMOS 200 MHz Quadrature Digital Upconverter |
| AD9856 | CMOS 180 MHz Quadrature Digital Upconverter(時鐘頻率為180MHz,CMOS的積分上變頻器) |
| AD9857 | CMOS 200 MSPS 14-Bit Quadrature Digital Upconverter |
| AD9857AST | CMOS 200 MSPS 14-Bit Quadrature Digital Upconverter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9854ASQZ | 制造商:Analog Devices 功能描述:Direct Digital Synthesizer 300MHz 2-DAC 12-Bit Parallel/Serial 80-Pin LQFP 制造商:Analog Devices 功能描述:Communication IC |
| AD9854AST | 制造商:Analog Devices 功能描述:Direct Digital Synthesizer 300MHz 2-DAC 12-Bit Parallel/Serial 80-Pin LQFP Tray 制造商:Rochester Electronics LLC 功能描述:200 MHZ QUADRATURE DDS SYNTHESIZER - Tape and Reel 制造商:Analog Devices 功能描述:IC SEMICONDUCTOR ((NS)) |
| 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。