- 您現在的位置：買賣IC網 > PDF目錄9511 > 8N3QV01EG-0081CDI8 (IDT, Integrated Device Technology Inc)IC VCXO LVPECL QD FREQUENCY 5X7 PDF資料下載
參數資料
| 型號： | 8N3QV01EG-0081CDI8 |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數： | 19/23頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC VCXO LVPECL QD FREQUENCY 5X7 |
| 特色產品： | Fourth-generation FemtoClock for VCXO |
| 標準包裝： | 1 |
| 系列： | FemtoClock® NG |
| 類型： | VCXO |
| 頻率： | 可調節(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： | 標準包裝 |
| 供應商設備封裝： | 10-CLCC |
| 安裝類型： | 表面貼裝 |
| 其它名稱： | 800-2574-6 |
IDT8N3QV01 Rev G Data Sheet
QUAD-FREQUENCY PROGRAMMABLE-VCXO
IDT8N3QV01GCD REVISION A MARCH 6, 2012
5
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 100 MHz. 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 pull
range programming and the serial interface description, see the
FemtoClock NG Ceramic 5x7 Module Programming Guide.
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
f
OUT
f
XTAL
1
PN
------------
MINT
MFRAC
0.5
+
2
18
-----------------------------------
+
=
(1)
相關PDF資料 |
PDF描述 |
|---|---|
| D38999/26MJ24SA | CONN PLUG 24POS STRAIGHT W/SCKT |
| NC7SZ384M5X | IC SWITCH BUS LP 1BIT SOT23-5 |
| LTC6903CMS8#PBF | IC OSC SILICON 68MHZ 8-MSOP |
| LTC6992CS6-2#TRMPBF | IC OSC SILICON 1MHZ TSOT23-6 |
| LTC6992CS6-3#TRMPBF | IC OSC SILICON 1MHZ TSOT23-6 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 8N3QV01EG-0082CDI | 功能描述:VCXO IC 622.08MHz, 156.25MHz, 155.52MHz, 125MHz 10-CLCC 制造商:idt, integrated device technology inc 系列:FemtoClock? NG 包裝:托盤 零件狀態(tài):有效 類型:VCXO 計數:- 頻率:622.08MHz，156.25MHz，155.52MHz，125MHz 電壓 - 電源:3.135 V ~ 3.465 V 電流 - 電源:150mA 工作溫度:-40°C ~ 85°C 封裝/外殼:10-CLCC 供應商器件封裝:10-CLCC（7x5） 安裝類型:表面貼裝 標準包裝:364 |
| 8N3QV01EG-0082CDI8 | 功能描述:可編程振蕩器 RoHS:否 制造商:IDT 封裝 / 箱體:5 mm x 7 mm x 1.5 mm 頻率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 頻率穩(wěn)定性:+/- 50 PPM 電源電壓:3.63 V 負載電容:10 pF 端接類型:SMD/SMT 輸出格式:LVPECL 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封裝: |
| 8N3QV01EG-0083CDI | 功能描述:VCXO IC 160MHz 10-CLCC 制造商:idt, integrated device technology inc 系列:FemtoClock? NG 包裝:托盤 零件狀態(tài):有效 類型:VCXO 計數:- 頻率:160MHz 電壓 - 電源:3.135 V ~ 3.465 V 電流 - 電源:150mA 工作溫度:-40°C ~ 85°C 封裝/外殼:10-CLCC 供應商器件封裝:10-CLCC（7x5） 安裝類型:表面貼裝 標準包裝:364 |
| 8N3QV01EG-0083CDI8 | 功能描述:VCXO IC 160MHz 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:VCXO 計數:- 頻率:160MHz 電壓 - 電源:3.135 V ~ 3.465 V 電流 - 電源:150mA 工作溫度:-40°C ~ 85°C 封裝/外殼:10-CLCC 供應商器件封裝:10-CLCC（7x5） 安裝類型:表面貼裝 標準包裝:1,000 |
| 8N3QV01EG-0084CDI | 功能描述:VCXO IC 622.08MHz, 669.3266MHz, 622.08MHz, 669.3266MHz 10-CLCC 制造商:idt, integrated device technology inc 系列:FemtoClock? NG 包裝:托盤 零件狀態(tài):有效 類型:VCXO 計數:- 頻率:622.08MHz，669.3266MHz，622.08MHz，669.3266MHz 電壓 - 電源:3.135 V ~ 3.465 V 電流 - 電源:150mA 工作溫度:-40°C ~ 85°C 封裝/外殼:10-CLCC 供應商器件封裝:10-CLCC（7x5） 安裝類型:表面貼裝 標準包裝:364 |
發(fā)布緊急采購，3分鐘左右您將得到回復。