参数资料
| 型号： | ADN2855ACPZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC CLK/RECOVERY MULTI 32LFCSP |
| 标准包装： | 1,500 |
| 类型： | 时钟和数据恢复（CDR） |
| PLL： | 是 |
| 主要目的： | GPON，BPON，GEPON |
| 输入： | CML |
| 输出： | LVDS |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:2 |
| 差分 - 输入:输出： | 是/是 |
| 频率 - 最大： | 200MHz |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 32-LFCSP-VQ（5x5） |
| 包装： | 带卷 (TR) |
ADN2855
Rev. A | Page 11 of 20
THEORY OF OPERATION
The ADN2855 is designed specifically for burst mode data
recovery in GPON/BPON/GEPON optical line terminal (OLT)
receivers.
The ADN2855 requires a reference clock that is frequency locked
to the incoming data. The FLL (frequency-locked loop) of the
ADN2855 acquires frequency lock with respect to this reference
clock, pulling the VCO towards 0 ppm frequency error. It is
assumed that the upstream bursts to the OLT are clocked by the
recovered clock from the optical network terminal (ONT) CDR.
This guarantees frequency lock to the OLT system clock.
The ADN2855 has a preamble detector that looks for a maximum
transition density pattern (1010…) within the preamble. Once
this pattern is detected in the preamble, the on-chip delay/phase-
locked loop (D/PLL) quickly acquires phase lock to the incoming
burst within 12 UI of the 1010… pattern. The D/PLL also pulls
in any remaining frequency error that was not pulled in by the
FLL. The incoming data is retimed by the recovered clock and
output either serially or in a 4-bit parallel output nibble.
The ADN2855 requires a RESET signal between bursts to set
the device into a fast phase acquisition mode. The RESET signal
must be asserted within 8 UI of the end of the previous burst,
and it must be deasserted prior to the start of the maximum
transition density portion of the preamble, which is specifically
provided for the burst mode clock recovery device to acquire
the phase of the incoming burst. The RESET signal must be at
least 16 UI wide. See the Reset Timing Options section for more
details.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADN2855XCPZ | 功能描述:IC CLK DATA REC GPON 200MHZ 制造商:analog devices inc. 系列:- 包装:托盘 零件状态:上次购买时间 PLL:是 主要用途:GPON，BPON，GEPON 输入:CML 输出:LVDS 电路数:1 比率 - 输入:输出:1:1 差分 - 输入:输出:是/是 频率 - 最大值:200MHz 电压 - 电源:3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:32-WFQFN 裸露焊盘 供应商器件封装:32-LFCSP-VQ（5x5） 标准包装:1 |
| ADN2860 | 制造商:AD 制造商全称:Analog Devices 功能描述:3-Channel Digital Potentiometer with Nonvolatile Memory |
| ADN2860ACPZ25 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| ADN2860ACPZ250 | 制造商:Analog Devices 功能描述: |
| ADN2860ACPZ250-RL7 | 功能描述:IC POT DGTL 3CH 250K 24-LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:2,500 系列:XDCP™ 接片:256 电阻（欧姆）:100k 电路数:1 温度系数:标准值 ±300 ppm/°C 存储器类型:非易失 接口:I²C（设备位址） 电源电压:2.7 V ~ 5.5 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) |
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