參數(shù)資料
型號(hào)： 8N3Q001EG-203LCDI8
廠商： IDT, Integrated Device Technology Inc
文件頁(yè)數(shù)： 16/21頁(yè)
文件大?。?/td> 0K
描述： IC CLCK OSC QUAD FREQUENCY 5X7
特色產(chǎn)品： Fourth-generation FemtoClock for VCXO
標(biāo)準(zhǔn)包裝： 1
系列： FemtoClock® NG
類型： 時(shí)鐘振蕩器
頻率： 可調(diào)節(jié)/可選擇
電源電壓： 2.375 V ~ 3.465 V
電流 - 電源： 150mA
工作溫度： -40°C ~ 85°C
封裝/外殼： 10-CLCC
包裝： 標(biāo)準(zhǔn)包裝
供應(yīng)商設(shè)備封裝： 10-CLCC
安裝類型： 表面貼裝
其它名稱： 800-2570-6
IDT8N3Q001 REV G Data Sheet
QUAD-FREQUENCY PROGRAMMABLE-XO
IDT8N3Q001GCD REVISION A MARCH 6, 2012
4
2012 Integrated Device Technology, Inc.
Principles of Operation
The block diagram consists of the internal 3rd overtone crystal and
oscillator which provide the reference clock fXTAL of either 114.285
MHz or 100MHz. The PLL includes the FemtoClock NG VCO along
with the Pre-divider (P), the feedback divider (M) and the post divider
(N). The P, M, and N dividers determine the output frequency based
on the fXTAL reference and must be configured correctly for proper
operation. The feedback divider is fractional supporting a huge
number of output frequencies. The configuration of the feedback
divider to integer-only values results in an improved output phase
noise characteristics at the expense of the range of output
frequencies. In addition, internal registers are used to hold up to four
different factory pre-set P, M, and N configuration settings. These
default pre-sets are stored in the I2C registers at power-up. Each
configuration is selected via the the FSEL[1:0] pins and can be read
back using the SCLK and SDATA pins.
The user may choose to operate the device at an output frequency
different than that set by the factory. After power-up, the user may
write new P, N and M settings into one or more of the four
configuration registers and then use the FSEL[1:0] pins to select the
newly programmed configuration. Note that the I2C registers are
volatile and a power supply cycle will reload the pre-set factory
default conditions.
If the user does choose to write a different P, M, and N configuration,
it is recommended to write to a configuration which is not currently
selected by FSEL[1:0] and then change to that configuration after the
I2C transaction has completed. Changing the FSEL[1:0] controls
results in an immediate change of the output frequency to the
selected register values. The P, M, and N frequency configurations
support an output frequency range 15.476MHz to 866.67MHz and
975MHz to 1,300MHz.
The devices use the fractional feedback divider with a delta-sigma
modulator for noise shaping and robust frequency synthesis
capability. The relatively high reference frequency minimizes phase
noise generated by frequency multiplication and allows more efficient
shaping of noise by the delta-sigma modulator.
The output frequency is determined by the 2-bit pre-divider (P), the
feedback divider (M) and the 7-bit post divider (N). The feedback
divider (M) consists of both a 7-bit integer portion (MINT) and an
18-bit fractional portion (MFRAC) and provides the means for
high-resolution frequency generation. The output frequency fOUT is
calculated by:
The four configuration registers for the P, M (MINT & MFRAC) and N
dividers which are named Pn, MINTn, MFRACn and Nn with n=0 to
3. “n” denominates one of the four possible configurations.
As identified previously, the configurations of P, M (MINT & MFRAC)
and N divider settings are stored the I2C register, and the
configuration loaded at power-up is determined by the FSEL[1:0]
pins.
Frequency Configuration
An order code is assigned to each frequency configuration
programmed by the factory (default frequencies). For more
information on the available default frequencies and order codes,
please see the Ordering Information Section in this document. For
available order codes, see the FemtoClock NG Ceramic-Package
XO and VCXO Ordering Product Information document.
For more information and guidelines on programming of the device
for custom frequency configurations, the register description, the
selection of fractional and integer-feedback configurations and the
serial interface description, see the FemtoClock NG Ceramic 5x7
Module Programming Guide.
f
OUT
f
XTAL
1
PN
------------
MINT
MFRAC
0.5
+
2
18
-----------------------------------
+
=
(1)
Table 4. Frequency Selection
Input
Selects
Register
FSEL1
FSEL0
0 (def.)
Frequency 0
P0, MINT0, MFRAC0, N0
0
1
Frequency 1
P1, MINT1, MFRAC1, N1
1
0
Frequency 2
P2, MINT2, MFRAC2, N2
1
Frequency 3
P3, MINT3, MFRAC3, N3
相關(guān)PDF資料
PDF描述
MS27473E24B19SA CONN PLUG 19POS STRAIGHT W/SCKT
V110A5M300B3 CONVERTER MOD DC/DC 5V 300W
8N3Q001EG-102LCDI8 IC CLCK OSC QUAD FREQUENCY 5X7
V110A5M300B CONVERTER MOD DC/DC 5V 300W
V110A8M300BL2 CONVERTER MOD DC/DC 8V 300W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
8N3Q001EG-204LCDI 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
8N3Q001EG-204LCDI8 功能描述:IC CLCK OSC QUAD FREQUENCY 5X7 RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 可編程計(jì)時(shí)器和振蕩器 系列:FemtoClock® NG 標(biāo)準(zhǔn)包裝:3,000 系列:- 類型:振蕩器 - 晶體 計(jì)數(shù):- 頻率:- 電源電壓:2.3 V ~ 5.5 V 電流 - 電源:1.07mA 工作溫度:-30°C ~ 80°C 封裝/外殼:SOT-665 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:SS迷你型-5D 安裝類型:表面貼裝 其它名稱:AN8955SSMTXLTR
8N3Q001EG-2148CDI 制造商:Integrated Device Technology Inc 功能描述:10-LEAD CERAMIC 5X7 - Bulk
8N3Q001EG-2148CDI8 功能描述:Clock Oscillator IC 231.25MHz 10-CLCC 制造商:idt, integrated device technology inc 系列:FemtoClock? NG 包裝:帶卷（TR） 零件狀態(tài):有效 類型:時(shí)鐘振蕩器 計(jì)數(shù):- 頻率:231.25MHz 電壓 - 電源:3.135 V ~ 3.465 V 電流 - 電源:140mA 工作溫度:-40°C ~ 85°C 封裝/外殼:10-CLCC 供應(yīng)商器件封裝:10-CLCC（7x5） 安裝類型:表面貼裝 標(biāo)準(zhǔn)包裝:1,000
8N3Q001EG-2163CDI 制造商:Integrated Device Technology Inc 功能描述:SMD Crystal Oscillator 3.3V 10-Pin CLCC Tray 制造商:Integrated Device Technology Inc 功能描述:10-LEAD CERAMIC 5X7 - Bulk
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*