參數(shù)資料
型號(hào): AD9557BCPZ
廠商: Analog Devices Inc
文件頁數(shù): 71/92頁
文件大?。?/td> 0K
描述: IC CLOCK TRANSLATOR 40LFCSP
產(chǎn)品變化通告: Minor Mask Change 11/Apr/2012
標(biāo)準(zhǔn)包裝: 1
類型: 時(shí)鐘/頻率轉(zhuǎn)換器
PLL:
主要目的: 以太網(wǎng),SONET/SDH
輸入: CMOS,LVDS,LVPECL
輸出: CMOS,HSTL,LVDS
電路數(shù): 1
比率 - 輸入:輸出: 2:2
差分 - 輸入:輸出: 是/是
頻率 - 最大: 1.25GHz
電源電壓: 1.71 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 40-VFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 40-LFCSP-VQ(6x6)
包裝: 托盤
Data Sheet
AD9557
Rev. B | Page 73 of 92
Address
Bits
Bit Name
Description
[2:0]
Pole 1 Cp1
Cp1 (pF)
Bit 2
Bit 1
Bit 0
0
20
80
100
20
40
100
120 (default)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0x0404
[7:1]
Reserved
Default: 0x00
0
Bypass internal Rzero
0 (default) = uses the internal Rzero resistor.
1 = bypasses the internal Rzero resistor (makes Rzero = 0 and requires the use of a series
external zero resistor).
0x0405
[7:4]
Reserved
Default: 0x2
3
APLL locked controlled
sync disable
0 (default) = the clock distribution sync function is not enabled until the output PLL (APLL) is
calibrated and locked. After APLL calibration and lock, the output clock distribution sync
is armed, and the sync function for the clock outputs is under the control of Register 0x0500.
1 = overrides the lock detector state of the output PLL; allows Register 0x0500 to control
the output sync function, regardless of the APLL lock status.
[2:1]
Reserved
Default: 00b
0
Manual APLL
VCO calibration
1 = initiates VCO calibration. (Calibration occurs on low-to-high transition).
0 (default) = does nothing. This is not an autoclearing bit.
1
Note that the default APLL loop BW is 180 KHz.
Table 65. Reserved
Address
Bits
Bit Name
Description
0x0406
[7:0]
Reserved
Default: 0x00
Table 66. RF Divider Setting
Address
Bits
Bit Name
Description
0x0407
[7:4]
RF Divider 2 division
0000/0001 = 3
0010 = 4
0011 = 5
0100 = 6 (default)
0101 = 7
0110 = 8
0111 = 9
1000 = 10
1001 = 11
[3:0]
RF Divider 1 division
0000/0001 = 3
0010 = 4
0011 = 5
0100 = 6 (default)
0101 = 7
0110 = 8
0111 = 9
1000 = 10
1001 = 11
0x0408
[7:5]
Reserved
Reserved.
4
RF divider start-up mode
0 (default) = RF dividers are held in power-down until the APLL feedback divider is detected.
This ensures proper RF divider operation, exiting full power-down.
1 = RF dividers are not held in power-down until the APLL feedback divider is detected.
[3:2]
Reserved
Reserved.
1
PD RF Divider 2
0 = enables RF Divider 2.
1 (default) = powers down RF Divider 2.
0
PD RF Divider 1
0 (default) = enables RF Divider 1.
1 = powers down RF Divider 1.
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