參數(shù)資料
型號: AD9558BCPZ-REEL7
廠商: Analog Devices Inc
文件頁數(shù): 80/104頁
文件大?。?/td> 0K
描述: IC CLK XLATR PLL 1250MHZ 64LFCSP
產(chǎn)品變化通告: AD9558 Minor Metal Mask Change 17/Apr/2012
標準包裝: 750
類型: 時鐘/頻率轉(zhuǎn)換器
PLL:
主要目的: 以太網(wǎng),SONET/SDH,Stratum
輸入: CMOS,LVDS,LVPECL
輸出: CMOS,HSTL,LVDS
電路數(shù): 1
比率 - 輸入:輸出: 4:6
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: 64-VFQFN 裸露焊盤,CSP
供應商設(shè)備封裝: 64-LFCSP-VQ(9x9)
包裝: 帶卷 (TR)
Data Sheet
AD9558
Rev. B | Page 77 of 104
Table 57. Fixed Closed-Loop Phase Lock Offset
Address
Bits
Bit Name
Description
0x030C
[7:0]
Fixed phase lock offset (signed; ps)
Fixed phase lock offset, Bits[7:0].
Default: 0x00.
0x030D
[7:0]
Fixed phase lock offset, Bits[15:8].
Default 0x00.
0x030E
[7:0]
Fixed phase lock offset, Bits[23:16].
Default: 0x00.
0x030F
[7:6]
Reserved
Reserved; default: 0x0.
[5:0]
Fixed phase lock offset (signed; ps)
Fixed phase lock offset, Bits[29:24].
Default: 0x00.
Table 58. Incremental Closed-Loop Phase Lock Offset Step Size1
Address
Bits
Bit Name
Description
0x0310
[7:0]
Incremental phase lock offset
step size (ps)
Incremental phase lock offset step size, Bits[7:0].
Default: 0x00.
This controls the static phase offset of the DPLL while it is locked.
0x0311
[7:0]
Incremental phase lock offset step size, Bits[15:8].
Default: 0x00.
This controls the static phase offset of the DPLL while it is locked.
1
Note that the default incremental closed-loop phase lock offset step size value is 0x0000 = 0 (0 ns).
Table 59. Phase Slew Rate Limit
Address
Bits
Bit Name
Description
0x0312
[7:0]
Phase slew rate limit (s/sec)
Phase slew rate limit, Bits[7:0].
Default: 0x00.
This register controls the maximum allowable phase slewing during transients
and reference switching.
The default phase slew rate limit is 0, or disabled. Minimum useful value is 310 s/sec.
0x0313
[7:0]
Phase slew rate limit, Bits[15:8].
Default: 0x00.
Table 60. History Accumulation Timer
Address
Bits
Bit Name
Description
0x0314
[7:0]
History accumulation timer (ms)
History accumulation timer bits[7:0].
Default: 0x0A. For Register 0x0314 and Register 0x0315, 0x000A = 10 ms.
Maximum is 65 sec. This register controls the amount of tuning word averaging used
to determine the tuning word used in holdover. Never program a timer value of
zero. The default value is 0x000A = 10 decimal, which equates to 10 ms
0x0315
[7:0]
History accumulation timer bits[15:8].
Default: 0x00.
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