参数资料
型号: AD9548BCPZ
厂商: Analog Devices Inc
文件页数: 101/112页
文件大小: 0K
描述: IC CLOCK GEN/SYNCHRONIZR 88LFCSP
产品变化通告: AD9548 Mask Change 20/Oct/2010
标准包装: 1
类型: 时钟/频率发生器,同步器
PLL:
主要目的: 以太网,SONET/SDH,Stratum
输入: CMOS,LVDS,LVPECL
输出: CMOS,LVDS,LVPECL
电路数: 1
比率 - 输入:输出: 1:1
差分 - 输入:输出: 是/是
频率 - 最大: 750kHz
电源电压: 1.71 V ~ 3.465 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 88-VFQFN 裸露焊盘,CSP
供应商设备封装: 88-LFCSP-VQ(12x12)
包装: 托盘
Data Sheet
AD9548
Rev. E | Page 89 of 112
Table 104. Digital Loop Filter Coefficients—Profile 21
Address
Bits
Bit Name
Description
0x0692
[7:0]
Alpha-0 linear
Alpha-0 coefficient linear, Bits[7:0]
0x0693
[7:0]
Alpha-0 coefficient linear, Bits[15:8]
0x0694
[7:6]
Alpha-2 exponent
Alpha-2 coefficient exponent, Bits[1:0]
[5:0]
Alpha-1 exponent
Alpha-1 coefficient exponent, Bits[5:0]
0x0695
[7:1]
Beta-0 linear
Beta-0 coefficient linear, Bits[6:0]
[0]
Alpha-2 exponent
Alpha-2 coefficient exponent, Bit 2
0x0696
[7:0]
Beta 0-linear
Beta-0 coefficient linear, Bits[14:7]
0x0697
[7]
Unused
[6:2]
Beta-1 exponent
Beta-1 coefficient exponent, Bits[4:0]
[1:0]
Beta-0 linear
Beta-0 coefficient linear, Bits[16:15]
0x0698
[7:0]
Gamma-0 linear
Gamma-0 coefficient linear, Bits[7:0]
0x0699
[7:0]
Gamma-0 coefficient linear, Bits[15:8]
0x069A
[7:6]
Unused
[5:1]
Gamma-1 exponent
Gamma-1 coefficient exponent, Bits[4:0]
[0]
Gamma-0 linear
Gamma-0 coefficient linear, Bit 6
0x069B
[7:0]
Delta-0 linear
Delta-0 coefficient linear, Bits[7:0]
0x069C
[7]
Delta-1 exponent
Delta-1 coefficient exponent, Bit 0
[6:0]
Delta-0 linear
Delta-0 coefficient linear, Bits[14:8]
0x069D
[7:4]
Alpha-3 exponent
Alpha-3 coefficient exponent, Bits[3:0]
[3:0]
Delta-1 exponent
Delta-1 coefficient exponent, Bits[4:1]
1
The digital loop filter coefficients (α, β, γ, and δ) have the general form: x(2y), where x is the linear component and y is the exponential component of the coefficient.
The value of the linear component (x) constitutes a fraction, where 0 ≤ x < 1. The exponential component (y) is an integer. See the Calculating Digital Filter Coefficients
section for details.
Table 105. R-Divider—Profile 21
Address
Bits
Bit Name
Description
0x069E
[7:0]
R
R, Bits[7:0]
0x069F
[7:0]
R, Bits[15:8]
0x06A0
[7:0]
R, Bits[23:16]
0x06A1
[7:6]
Unused
[5:0]
R
R, Bits[29:24]
1
The value stored in the R-divider register yields an actual divide ratio of one more than the programmed value.
Table 106. S-Divider—Profile 21
Address
Bits
Bit Name
Description
0x06A2
[7:0]
S
S, Bits[7:0]
0x06A3
[7:0]
S, Bits[15:8]
0x06A4
[7:0]
S, Bits[23:16]
0x06A5
[7:6]
Unused
[5:0]
S
S, Bits[29:24]
1
The value stored in the S-divider register yields an actual divide ratio of one more than the programmed value. Furthermore, the value of S must be at least 7.
Table 107. Fractional Feedback Divider—Profile 2
Address
Bits
Bit Name
Description
0x06A6
[7:0]
V
V, Bits[7:0]
0x06A7
[7:4]
U
U, Bits[3:0]
[3:2]
Unused
[1:0]
V
V, Bits[9:8]
0x06A8
[7:6]
Unused
[5:0]
U
U, Bits[9:4]
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