參數(shù)資料
型號: AD9558BCPZ
廠商: Analog Devices Inc
文件頁數(shù): 92/104頁
文件大小: 0K
描述: IC CLOCK TRANSLATOR 64LFCSP
產(chǎn)品變化通告: AD9558 Minor Metal Mask Change 17/Apr/2012
標(biāo)準(zhǔn)包裝: 1
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(yīng)商設(shè)備封裝: 64-LFCSP-VQ(9x9)
包裝: 托盤
AD9558
Data Sheet
Rev. B | Page 88 of 104
Table 83. DPLL Loop BW Scaling Factor—REFA Profile1
Address
Bits
Bit Name
Description
0x070F
[7:0]
DPLL loop BW scaling factor
(unit of 0.1 Hz)
Digital PLL loop bandwidth scaling factor, Bits[7:0] (default: 0xF4).
0x0710
[7:0]
Digital PLL loop bandwidth scaling factor, Bits[15:8] (default: 0x01).
The default for Register 0x070F to Register 0x0710 = 0x01F4 = 500 (50 Hz loop bandwidth).
The loop bandwidth should always be less than the DPLL phase detector frequency
divided by 20.
0x0711
[7:1]
Reserved
Default: 0x00.
0
BW scaling factor
Digital PLL loop bandwidth scaling factor, Bit 16 (default: 0b).
1
Note that the default DPLL loop BW is 50.4 Hz.
Table 84. R-Divider—REFA Profile1
Address
Bits
Bit Name
Description
0x0712
[7:0]
R divider
DPLL integer reference divider (minus 1), Bits[7:0] (default: 0xC5)
0x0713
[7:0]
DPLL integer reference divider, Bits[15:8] (default: 0x00)
0x0714
[7:5]
Reserved
Reserved. Default: 0x0
4
Enable REFA div2
Enables the reference input divide-by-2 for REFA
0 = bypass the divide-by-2 (default)
1 = enable the divide-by-2
[3:0]
R divider
DPLL integer reference divider, Bits[19:16] (default: 0x0).
The default for Register 0x0712 to Register 0x0714 = 0x000C5 = 197 (which equals R = 198).
1
Note that the value stored in the R-divider register yields an actual divide ratio of one more than the programmed value.
Table 85. Integer Part of Fractional Feedback Divider N1—REFA Profile1
Address
Bits
Bit Name
Description
0x0715
[7:0]
Integer Part N1
DPLL integer feedback divider (minus 1), Bits[7:0] (default: 0x6B).
0x0716
[7:0]
DPLL integer feedback divider, Bits[15:8] (default: 0x07).
0x0717
[7:1]
Reserved
Reserved. Default: 0x00.
0
Integer Part N1
DPLL integer feedback divider, Bit 16 (default: 0b).
The default for Register 0x0715 to Register 0x717 = 0x0076B (which equals N1 = 1900).
1
Note that the value stored in the N1-divider register yields an actual divide ratio of one more than the programmed value.
Table 86. Fractional Part of Fractional Feedback Divider FRAC1—REFA Profile
Address
Bits
Bit Name
Description
0x0718
[7:0]
Digital PLL fractional feedback
divider—FRAC1
The numerator of the fractional-N feedback divider, Bits[7:0] (default: 0x04)
0x0719
[7:0]
The numerator of the fractional-N feedback divider, Bits[15:8] (default: 0x00)
0x071A
[7:0]
The numerator of the fractional-N feedback divider, Bits[23:16] (default: 0x00)
Table 87. Modulus of Fractional Feedback Divider MOD1—REFA Profile
Address
Bits
Bit Name
Description
0x071B
[7:0]
Digital PLL feedback divider
modulus—MOD1
The denominator of the fractional-N feedback divider, Bits[7:0] (default: 0x05)
0x071C
[7:0]
The denominator of the fractional-N feedback divider, Bits[15:8] (default: 0x00)
0x071D
[7:0]
The denominator of the fractional-N feedback divider, Bits[23:16] (default: 0x00)
Table 88. Phase and Frequency Lock Detector Controls—REFA Profile
Address
Bits
Bit Name
Description
0x071E
[7:0]
Phase lock threshold
Phase lock threshold, Bits[7:0] (default: 0xBC); default of 0x02BC = 700 ps
0x071F
[7:0]
Phase lock threshold, Bits[15:8] (default: 0x02)
0x0720
[7:0]
Phase lock fill rate
Phase lock fill rate, Bits[7:0] (default:0x0A = 10 code/PFD cycle)
0x0721
[7:0]
Phase lock drain rate
Phase lock drain rate, Bits[7:0] (default: 0x0A = 10 code/PFD cycle)
0x0722
[7:0]
Frequency lock threshold
Frequency lock threshold, Bits[7:0] (default: 0xBC); default of 0x02BC = 700 ps
0x0723
[7:0]
Frequency lock threshold, Bits[15:8] (default: 0x02)
0x0724
[7:0]
Frequency lock threshold, Bits[23:16] (default: 0x00)
0x0725
[7:0]
Frequency lock fill rate
Frequency lock fill rate, Bits[7:0] (default: 0x0A = 10 code/PFD cycle)
0x0726
[7:0]
Frequency lock drain rate
Frequency lock drain rate bits[7:0] (default: 0x0A = 10 code/PFD cycle)
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