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參數(shù)資料
| 型號： | AD9512BCPZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 40/48頁 |
| 文件大小： | 0K |
| 描述： | IC CLOCK DIST 5OUT PLL 48LFCSP |
| 標準包裝： | 750 |
| 類型： | 扇出緩沖器（分配），除法器 |
| PLL： | 無 |
| 輸入： | 時鐘 |
| 輸出： | CMOS，LVDS，LVPECL |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 2:5 |
| 差分 - 輸入:輸出： | 是/是 |
| 頻率 - 最大： | 1.2GHz |
| 除法器/乘法器： | 是/無 |
| 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： | 48-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 48-LFCSP-VQ（7x7） |
| 包裝： | 帶卷 (TR) |
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AD9512
Rev. A | Page 45 of 48
Because of the limitations of single-ended CMOS clocking,
consider using differential outputs when driving high speed
signals over long traces. The AD9512 offers both LVPECL and
LVDS outputs, which are better suited for driving long traces
where the inherent noise immunity of differential signaling
provides superior performance for clocking converters.
LVDS CLOCK DISTRIBUTION
Low voltage differential signaling (LVDS) is a second
differential output option for the AD9512. LVDS uses a current
mode output stage with several user-selectable current levels.
The normal value (default) for this current is 3.5 mA, which
yields 350 mV output swing across a 100 Ω resistor. The LVDS
outputs meet or exceed all ANSI/TIA/EIA—644 specifications.
LVPECL CLOCK DISTRIBUTION
The low voltage, positive emitter-coupled, logic (LVPECL)
outputs of the AD9512 provide the lowest jitter clock signals
available from the AD9512. The LVPECL outputs (because they
are open emitter) require a dc termination to bias the output
transistors. A simplified equivalent circuit in Figure 27 shows
the LVPECL output stage.
A recommended termination circuit for the LVDS outputs is
shown in Figure 44.
05287-
032
3.3V
LVDS
100
Ω
DIFFERENTIAL (COUPLED)
3.3V
LVDS
100
Ω
In most applications, a standard LVPECL far-end termination is
recommended, as shown in Figure 42. The resistor network is
designed to match the transmission line impedance (50 Ω) and
the desired switching threshold (1.3 V).
Figure 44. LVDS Output Termination
05287-
030
3.3V
LVPECL
50
Ω
50
Ω
SINGLE-ENDED
(NOT COUPLED)
3.3V
LVPECL
127
Ω
127
Ω
83
Ω
83
Ω
VT = VCC – 1.3V
See Application Note AN-586 on the ADI website at
www.analog.com for more information on LVDS.
POWER AND GROUNDING CONSIDERATIONS AND
POWER SUPPLY REJECTION
Many applications seek high speed and performance under less
than ideal operating conditions. In these application circuits,
the implementation and construction of the PCB is as
important as the circuit design. Proper RF techniques must be
used for device selection, placement, and routing, as well as for
power supply bypassing and grounding to ensure optimum
performance.
Figure 42. LVPECL Far-End Termination
05287-
031
3.3V
LVPECL
DIFFERENTIAL
(COUPLED)
3.3V
LVPECL
100
Ω
0.1nF
200
Ω
200
Ω
Figure 43. LVPECL with Parallel Transmission Line
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9512-EP | 制造商:AD 制造商全稱:Analog Devices 功能描述:1.2 GHz Clock Distribution IC, 1.6 GHz Inputs, Dividers, Five Outputs |
| AD9512-PCB | 制造商:AD 制造商全稱:Analog Devices 功能描述:1.2 GHz Clock Distribution IC, 1.6 GHz Inputs, Dividers, Delay Adjust, Five Outputs |
| AD9512UCPZ-EP | 功能描述:IC CLOCK DIST 5OUT PLL 48LFCSP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:- 標準包裝:2,000 系列:- 類型:PLL 時鐘發(fā)生器 PLL:帶旁路 輸入:LVCMOS，LVPECL 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:2:11 差分 - 輸入:輸出:是/無 頻率 - 最大:240MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:32-LQFP 供應(yīng)商設(shè)備封裝:32-TQFP（7x7） 包裝:帶卷 (TR) |
| AD9512UCPZ-EP-R7 | 功能描述:IC CLOCK DIST 5OUT PLL 48LFCSP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:- 標準包裝:2,000 系列:- 類型:PLL 時鐘發(fā)生器 PLL:帶旁路 輸入:LVCMOS，LVPECL 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:2:11 差分 - 輸入:輸出:是/無 頻率 - 最大:240MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:32-LQFP 供應(yīng)商設(shè)備封裝:32-TQFP（7x7） 包裝:帶卷 (TR) |
| AD9513 | 制造商:AD 制造商全稱:Analog Devices 功能描述:800 MHz Clock Distribution IC, Dividers, Delay Adjust, Three Outputs |
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