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參數(shù)資料
| 型號： | AD9512UCPZ-EP |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 18/48頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CLOCK DIST 5OUT PLL 48LFCSP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 扇出緩沖器（分配），除法器 |
| PLL： | 無 |
| 輸入： | 時鐘 |
| 輸出： | LVCMOS，LVDS，LVPECL |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 1:5 |
| 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： | -55°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： | 托盤 |
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AD9512
Rev. A | Page 25 of 48
DIVIDERS
Each of the five clock outputs of the AD9512 has its own
divider. The divider can be bypassed to get an output at the
same frequency as the input (1×). When a divider is bypassed, it
is powered down to save power.
All integer divide ratios from 1 to 32 may be selected. A divide
ratio of 1 is selected by bypassing the divider.
Each divider can be configured for divide ratio, phase, and duty
cycle. The phase and duty cycle values that can be selected
depend on the divide ratio that is chosen.
Setting the Divide Ratio
The divide ratio is determined by the values written via the SCP
to the registers that control each individual output, OUT0 to
OUT4. These are the even numbered registers beginning at 4Ah
and going through 52h. Each of these registers is divided into
bits that control the number of clock cycles the divider output
stays high (high_cycles <3:0>) and the number of clock cycles
the divider output stays low (low_cycles <7:4>). Each value is 4
bits and has the range of 0 to 15.
The divide ratio is set by
Divide Ratio = (high_cycles + 1) + (low_cycles + 1)
Example 1:
Set the Divide Ratio = 2
high_cycles = 0
low_cycles = 0
Divide Ratio = (0 + 1) + (0 + 1) = 2
Example 2:
Set Divide Ratio = 8
high_cycles = 3
low_cycles = 3
Divide Ratio = (3 + 1) + (3 + 1) = 8
Note that a Divide Ratio of 8 may also be obtained by setting:
high_cycles = 2
low_cycles = 4
Divide Ratio = (2 + 1) + (4 + 1) = 8
Although the second set of settings produces the same divide
ratio, the resulting duty cycle is not the same.
Setting the Duty Cycle
The duty cycle and the divide ratio are related. Different divide
ratios have different duty cycle options. For example, if Divide
Ratio = 2, the only duty cycle possible is 50%. If the Divide
Ratio = 4, the duty cycle can be 25%, 50%, or 75%.
The duty cycle is set by
Duty Cycle = (high_cycles + 1)/[(high_cycles + 1) + (low_cycles + 1)]
See Table 12 for the values of the available duty cycles for each
divide ratio.
Table 12. Duty Cycle and Divide Ratio
4Ah to 52h
Divide Ratio
Duty Cycle (%)
LO<7:4>
HI<3:0>
2
50
0
3
67
0
1
3
33
1
0
4
50
1
4
75
0
2
4
25
2
0
5
60
1
2
5
40
2
1
5
80
0
3
5
20
3
0
6
50
2
6
67
1
3
6
33
3
1
6
83
0
4
6
17
4
0
4Ah to 52h
Divide Ratio
Duty Cycle (%)
LO<7:4>
HI<3:0>
7
57
2
3
7
43
3
2
7
71
1
4
7
29
4
1
7
86
0
5
7
14
5
0
8
50
3
8
63
2
4
8
38
4
2
8
75
1
5
8
25
5
1
8
88
0
6
8
13
6
0
9
56
3
4
9
44
4
3
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| 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(biāo)準(zhǔn)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 |
| AD9513/PCB | 制造商:Analog Devices 功能描述:EVAL BD FOR AD9513 ,800 MHZ CLOCK DISTRIBUTION IC, DIVIDERS, - Bulk |
| AD9513/PCBZ | 功能描述:BOARD EVAL FOR AD9513 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:PSoC® 主要目的:電源管理，熱管理 嵌入式:- 已用 IC / 零件:- 主要屬性:- 次要屬性:- 已供物品:板，CD，電源 |
| AD9513BCPZ | 功能描述:IC CLOCK DIST 3OUT PLL 32LFCSP 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(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 |
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