參數(shù)資料
型號(hào)： IDT5V49EE702NDGI
廠商： IDT, Integrated Device Technology Inc
文件頁(yè)數(shù)： 2/34頁(yè)
文件大?。?/td> 0K
描述： IC PLL CLK GEN 200MHZ 28VQFN
產(chǎn)品培訓(xùn)模塊： VersaClock™ III Programmable Clocks
特色產(chǎn)品： VersaClock III Timing Devices
標(biāo)準(zhǔn)包裝： 75
系列： VersaClock™ III
類型： 時(shí)鐘發(fā)生器，多路復(fù)用器
PLL： 帶旁路
輸入： LVCMOS，LVTTL，晶體
輸出： HCSL，LVCMOS，LVDS，LVPECL，LVTTL
電路數(shù)： 1
比率 - 輸入:輸出： 2:7
差分 - 輸入:輸出： 無/是
頻率 - 最大： 500MHz
除法器/乘法器： 是/是
電源電壓： 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： 28-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 28-VFQFPN（4x4）
包裝： 管件
其它名稱： 800-1918
IDT5V49EE702DLGI
IDT5V49EE702
EEPROM PROGRAMMABLE CLOCK GENERATOR
CLOCK SYNTHESIZER
IDT EEPROM PROGRAMMABLE CLOCK GENERATOR
10
IDT5V49EE702
REV M 092412
Spread Spectrum Generation (PLL3)
PLL3 support spread spectrum generation capability, which
users have the option of turning on and off. Spread
spectrum profile, frequency, and spread are fully
programmable (within limits). The technique is different from
that used in PLL0. The programmable spread spectrum
generation parameters are SS_D3[7:0], SSVCO[15:0],
SSENB, IP3[4:0] and RZ3[3:0] bits. These bits are in the
memory address range of 0x4C to 0x85 for PLL3. The
spread spectrum generation on PLL3 can be
enabled/disabled using the SSENB bit. To enable spread
spectrum, set SSENB = '1'.
For Spread Enabled:
Spread spectrum is configured using SS_D3(spread
spectrum reference divide)
and SSVCO (spread spectrum loop feedback counter).
SS is the total Spread Spectrum amount (I.e. center spread
+0.5% has a total spread of 1.0% and down spread -0.5%
has a total spread of 0.5%.)
Loop Filter
The loop filter for each PLL can be programmed to optimize
the jitter performance. The low-pass frequency response of
the PLL is the mechanism that dictates the jitter transfer
characteristics. The loop bandwidth can be extracted from
the jitter transfer. A narrow loop bandwidth is good for jitter
attenuation while a wide loop bandwidth is best for low-jitter
frequency generation. The specific loop filter components
that can be programmed are the resistor via the RZ[3:0] bits,
zero capacitor via the CZ bit (for PLL0, PLL1 and PLL2), and
the charge pump current via the IP[2:0] bits (for PLL0, PLL1
and PLL2) or IP[3:0] (for PLL3).
The following equations govern how the loop filter is set for
PLL0 - PLL2:
Resistor (Rz) = (RZ[0] + 2* RZ[1]+4* RZ[2] + 8* RZ[3])* 4.0
kOhm
Zero capacitor (Cz) = 196 pF + CZ* 217 pF
Pole capacitor (Cp) = 15 pF
Charge pump (Ip) = 6 * (IP[0] + 2*IP[1]+4*IP[2]) uA
VCO gain (KVCO) = 900 MHz/V * 2
π
The following equations govern how the loop filter is set for
PLL3:
For Non-Spread Spectrum Operation:
For Spread Spectrum Operation:
Zero capacitor (Cz) = 250 pF
Pole capacitor (Cp) = 15 pF
For Non-Spread Spectrum Operation:
For Spread Spectrum Operation:
VCO gain (KVCO) = 900 MHz/V * 2
π
=
SS_D3
(Eq. 10)
F
IN
4 * F
MOD
SSVCO =
F
VCO
F
MOD
[0.5 *
*
(Eq. 11)
( 1 + SS/400) + 5]
Resistor(Rz)=
(12.5 + 12.5*(RZ[1] + 2*RZ[2] + 4*RZ[3]))
* RZ[0] + 6*(1 – RZ[0])
kOhms (Eq. 12)
Resistor(Rz)=
(62.5 + 12.5*(RZ[1] + 2*RZ[2] + 4*RZ[3]))
* RZ[0] + 6*(1 – RZ[0])
kOhms (Eq. 13)
Charge
pump(Ip)
=
24* (1+(2* IP[0]) +(4* IP[1]) +(8* IP[2]))
A (Eq. 14)
3+(5* IP[3]) +(11* IP[4])
Charge
pump(Ip)
=
12* (1+(2* IP[0]) +(4* IP[1]) +(8* IP[2]))
A (Eq. 14)
27+(5* IP[3]) +(11* IP[4])
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IDT5V49EE702NDGI8 功能描述:IC PLL CLK GEN 200MHZ 28VQFN 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:VersaClock™ III 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:時(shí)鐘/頻率合成器，扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT
IDT5V49EE703NDGI 制造商:Integrated Device Technology Inc 功能描述:IC CLOCK GENERATOR
IDT5V49EE703NDGI8 制造商:Integrated Device Technology Inc 功能描述:IC CLK GEN EEPROM PROGR 28QFN
IDT5V49EE704NDGI 功能描述:IC PLL CLK GEN 200MHZ 28VFQFPN 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:VersaClock™ III 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
IDT5V49EE704NDGI8 功能描述:IC PLL CLK GEN 200MHZ 28VFQFPN 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:VersaClock™ III 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:時(shí)鐘/頻率合成器，扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT
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