8 GHz fractional syntHesizer For price" />
參數(shù)資料
型號(hào): HMC703LP4E
廠商: Hittite Microwave Corporation
文件頁數(shù): 21/58頁
文件大?。?/td> 0K
描述: IC FRACT-N PLL W/SWEEPR 24QFN
標(biāo)準(zhǔn)包裝: 1
類型: 整數(shù) N/小數(shù) N 分頻
PLL:
輸入: CMOS
輸出: CMOS
電路數(shù): 1
比率 - 輸入:輸出: 1:1
差分 - 輸入:輸出: 是/無
頻率 - 最大: 8GHz
除法器/乘法器: 是/無
電源電壓: 3.3V,5V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 24-VQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 24-QFN 裸露焊盤(4x4)
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: 1127-1065-6
p
ll
s
-
s
M
T
6 - 28
HMC703LP4E
v02.0813
8 GHz fractional syntHesizer
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
978-250-3343 978-250-3373 fax Order On-line at www.hittite.com
Application Support: pll@hittite.com
Figure 34. Single Step Ramp Mode
The user should be aware that the synthesized ramp is subject to normal phase locked loop dynamics. If the loop
bandwidth in use is much wider than the rate of the steps then the locking will be fast and the ramp will have a
staircase shape. If the update rate is higher than the loop bandwidth, as is normally the case, then the loop will not
fully settle before a new frequency step is received. Hence the swept output will have a small lag and will sweep in a
near continuous fashion.
Detailed sweeper configuration
The Following procedure is recommended to configure the frequency sweep in HMC703LP4E:
1.
Lock in fractional mode (Reg 06h[7:5] = 0) to the start frequency (f0).
2.
Program frequency step Reg 0Ah and stop N (Reg 0Ch,Reg 0Dh). Note that stop N must be exactly equal
to start N plus an integer number of steps (Reg 0Ah). If it is not, the sweeper function will not terminate
properly. This normally means rounding the stop N up or down slightly to ensure it falls on a step boundary.
3.
Change Mode to Reg 06h[7:5] = 5,6, or 7 - depending on the desired profile.
Note that the ramp step Reg 0Ah is signed two’s complement. If negative, the first ramp has a negative slope, and
vice-versa.
setting autoseed (Reg 06h[8] = 1) ensures that different sweeps have identical phase profile. This is achieved by
loading the seed (Reg 05h) into the phase accumulator at the beginning of each ramp
setting Reg 06h[22] = 1 ensures identical phase AND quantization noise performance on each sweep by resetting the
entire delta-sigma modulator at the beginning of each ramp.
Note that, while the HMC703LP4E can enforce phase coherence between different frequency sweeps, there will be a
phase discontinuity if the start phase that is programmed in sEED (Reg 05h) is different from the phase state that the
PLL finds itself in at the end of the ramp. This discontinuity can be prevented by tailoring the sweep profile such that
the phase of the PLL at the start of the ramp is equal to phase at the end of the ramp.
Example: Configure a sweep from f0 = 3000 MHz to ff = 3105 MHz in Tramp ≈ 2 ms, with fPD = 50 MHz:
1. Start in fractional mode (Program Reg 06h[7:5] = 0)
1. Calculate Start N and Stop N, Program Start N (Reg 03h,Reg 04h)
Start N = 3000.0 MHz / 50.0 MHz = 60.0
Stop N = 3105.0 MHz / 50.0 MHz = 62.1
相關(guān)PDF資料
PDF描述
HMC704LP4E IC FRACT-N PLL 16BIT 24QFN
HMC830LP6GE IC FRACT-N PLL W/VCO 40QFN
HMP8117CNZ IC VIDEO DECODER NTSC/PAL 80PQFP
HMP8156ACNZ IC VIDEO ENCODER NTSC/PAL 64MQFP
HSP45102SC-40Z IC OSC NCO 40MHZ 28-SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HMC703LP4ETR 制造商:Hittite Microwave Corp 功能描述:IC FRACT-N PLL W/SWEEPR 24QFN 制造商:Hittite Microwave Corp 功能描述:8 GHz Fractional-N PLL with Sweeper
HMC7043LP7FE 功能描述:IC FRACT-N PLL W/SWEEPR 48LFCSP 制造商:analog devices inc. 系列:- 包裝:剪切帶(CT) 零件狀態(tài):新產(chǎn)品 類型:* PLL:是 輸入:時(shí)鐘 輸出:CML,LVDS,LVPECL 電路數(shù):1 比率 - 輸入:輸出:1:14 差分 - 輸入:輸出:是/是 頻率 - 最大值:3.2GHz 分頻器/倍頻器:是/無 電壓 - 電源:3.135 V ~ 3.465 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤,CSP 供應(yīng)商器件封裝:48-LFCSP(7x7) 標(biāo)準(zhǔn)包裝:1
HMC7043LP7FETR 功能描述:IC FRACT-N PLL W/SWEEPR 48LFCSP 制造商:analog devices inc. 系列:- 包裝:剪切帶(CT) 零件狀態(tài):在售 類型:時(shí)鐘緩沖器 PLL:是 輸入:時(shí)鐘 輸出:CMOS,LVDS,LVPECL 電路數(shù):1 比率 - 輸入:輸出:1:14 差分 - 輸入:輸出:是/是 頻率 - 最大值:3.2GHz 分頻器/倍頻器:是/無 電壓 - 電源:3.135 V ~ 3.465 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤,CSP 供應(yīng)商器件封裝:48-LFCSP(7x7) 標(biāo)準(zhǔn)包裝:1
HMC7044LP10BETR 功能描述:IC JITTER ATTENUATOR 68LFCSP 制造商:analog devices inc. 系列:- 包裝:剪切帶(CT) 零件狀態(tài):在售 類型:漂移衰減器 PLL:是 輸入:CML,CMOS,LVDS,LVPECL 輸出:CML,LVDS,LVPECL 電路數(shù):1 比率 - 輸入:輸出:4:14 差分 - 輸入:輸出:是/是 頻率 - 最大值:3.2GHz 分頻器/倍頻器:是/無 電壓 - 電源:3.135 V ~ 3.465 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:68-VFQFN 裸露焊盤,CSP 供應(yīng)商器件封裝:68-LFCSP-VQ(10x10) 標(biāo)準(zhǔn)包裝:1
HMC704LP4E 功能描述:IC FRACT-N PLL 16BIT 24QFN RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器,PLL,頻率合成器 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:PLL 頻率合成器 PLL:是 輸入:晶體 輸出:時(shí)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(yīng)商設(shè)備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱:NJW1504V-TE1-NDNJW1504V-TE1TR