- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄16565 > EVAL-ADF4360-9EBZ1 (Analog Devices Inc)EVALUATION BOARD FOR ADF4360-9 PDF資料下載
參數(shù)資料
| 型號： | EVAL-ADF4360-9EBZ1 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 13/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVALUATION BOARD FOR ADF4360-9 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 主要目的： | 計時，頻率合成器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ADF4360-9 |
| 主要屬性： | 帶 VCO 的單路整數(shù)-N PLL |
| 次要屬性： | 360MHz，1.6MHz PFD |
| 已供物品： | 板 |
| 其它名稱： | Q5254840 |
ADF4360-9
Data Sheet
Rev. C | Page 20 of 24
APPLICATIONS
CHOOSING THE CORRECT INDUCTANCE VALUE
The ADF4360-9 can be used at many different frequencies
simply by choosing the external inductors to give the correct
output frequency. Figure 27 shows a graph of both minimum
and maximum frequency vs. the external inductor value. The
correct inductor should cover the maximum and minimum
frequencies desired. The inductors used are 0603 CS or 0805 CS
type from Coilcraft. To reduce mutual coupling, the inductors
should be placed at right angles to one another.
The lowest center frequency of oscillation possible is approximately
65 MHz, which is achieved using 560 nH inductors. This
relationship can be expressed by
(
)
EXT
O
L
f
+
=
nH
0.9
pF
9.3
2π
1
where:
fO is the center frequency.
LEXT is the external inductance.
0
150
50
100
350
250
300
200
450
400
0
100
200
300
400
600
500
INDUCTANCE (nH)
F
RE
Q
UE
NC
Y
(MH
z)
07139
-025
Figure 27. Output Center Frequency vs. External Inductor Value
The approximate value of capacitance at the midpoint of the
center band of the VCO is 9.3 pF, and the approximate value of
internal inductance due to the bond wires is 0.9 nH. The VCO
sensitivity is a measure of the frequency change vs. the tuning
voltage. It is a very important parameter for the low-pass filter.
Figure 28 shows a graph of the tuning sensitivity (in MHz/V)
vs. the inductance (nH). It can be seen that as the inductance
increases, the sensitivity decreases. This relationship can be
derived from the previous equation; that is, because the
inductance increased, the change in capacitance from the
varactor has less of an effect on the frequency.
0
4
2
10
8
6
12
0
100
200
300
400
600
500
INDUCTANCE (nH)
SEN
SI
T
IVI
T
Y
(MH
z/
V)
07139-
026
Figure 28. Tuning Sensitivity vs. Inductance
ENCODE CLOCK FOR ADC
Analog-to-digital converters (ADCs) require a sampling clock
for their operation. Generally, this is provided by TCXO or VCXOs,
which can be large and expensive. The frequency range is usually
quite limited. An alternative solution is the ADF4360-9, which can
be used to generate a CMOS clock signal suitable for use in all
but the most demanding converter applications.
Figure 29 shows an ADF4360-9 with a VCO frequency of
320 MHz and a DIVOUT frequency of 80 MHz. Because a 50%
duty cycle is preferred by most sampling clock circuitry, the A/2
mode is selected. Therefore, A is programmed to 2, giving an
overall divide value of 4. The AD9215-80 is a 10-bit, 80 MSPS
ADC that requires an encode clock jitter of 6 ps or less. The
ADF4360-9 takes a 10 MHz TCXO frequency and divides this to
1 MHz; therefore, R = 10 is programmed and N = 320 is
programmed
to achieve a VCO frequency of 320 MHz. The resultant 80 MHz
CMOS signal has a jitter of <1.5 ps, which is more than adequate
for the application.
TCXO
10MHz
ADF4360-9
80MHz
470
21nH
LPF
SIGNAL
GENERATOR
HC-ADC-
EVALA-SC
USB
SPI
PC
ENCODE
CLOCK
AD9215-80
AIN
07139-
036
Figure 29. The ADF4360-9 Used as an Encode Clock for an ADC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RCM12DRYN-S13 | CONN EDGECARD 24POS .156 EXTEND |
| RCM12DRYH-S13 | CONN EDGECARD 24POS .156 EXTEND |
| HCM08DSEI-S13 | CONN EDGECARD 16POS .156 EXTEND |
| HBM08DSEI-S13 | CONN EDGECARD 16POS .156 EXTEND |
| ASPI-7318-2R5M-T | INDUCTOR SHIELD 2.5UH SMD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVAL-ADF4602EB3Z | 制造商:Analog Devices 功能描述:EVALUATION BOARD - Boxed Product (Development Kits) |
| EVAL-ADF4602EB5Z | 制造商:Analog Devices 功能描述:EVALUATION BOARD - Boxed Product (Development Kits) |
| EVAL-ADF4XXXZ-USB | 功能描述:BOARD ADAPTER USB/PAR ADF4XXX RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 配件 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:USB 至 1-Wire? RJ11 適配器 適用于相關(guān)產(chǎn)品:1-Wire? 設(shè)備 產(chǎn)品目錄頁面:1429 (CN2011-ZH PDF) |
| EVAL-ADF5000EB2Z | 功能描述:BOARD EVAL FOR ADF5000 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:* 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電信，線路接口單元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要屬性:T1/J1/E1 LIU 次要屬性:- 已供物品:板，電源，線纜，CD 其它名稱:82EBV2081 |
| EVAL-ADF5001EB2Z | 制造商:Analog Devices 功能描述:EVALUATION BOARDS - Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。