SiT3921中文资料1 to 220 MHz, Differential Digitally-controlled XO数据手册SiTime规格书

描述 Description

The SiT3921 is a highly flexible, differential DCXO with LVPECL and LVDS outputs. This programmable device supports any frequency, 1 to 220 MHz, along with any combination of voltage (1.8 V, 2.5 V-3.3 V), pull range (±25 ppm to ±200 ppm) and package (3225, 5032, 7050). It enables frequency tuning via a unique one-wire interface, eliminating frequency drift that is caused by board noise and simplifying PLL and clock synchronization design. It comes in 3 industry-standard 6-pin packages (3.2x2.5 mm, 5.0x3.2 mm, 7.0x5.0 mm).

特性 Features

• Digitally controlled 1 ppb frequency pull resolution
• Frequency from 1 MHz to 220 MHz
• Supply voltage of 1.8 V; 2.5 V to 3.3 V
• Frequency stability from ±10 ppm to ±50 ppm
• Pull range from ±25 ppm to ±1600 ppm:
• Eliminating a need for external DAC
• Customized specification for optimal system performance
• Easy availability of any device specifications within the operating range

One-wire digital frequency tuning
• Simpler loop control in software controlled system PLL
• More consistent PLL bandwidth over operating range
• Faster calibration and lock time
• Reduction of modulation harmonics;

Three industry-standard packages
• Minor modification to existing design using VCXO to adopt the DCXO;

4 to 6 weeks lead time
• Reduce inventory overhead
• Mitigate shortage risks

应用 Application

• Networking & Communication Systems
• Networked Video Systems & Digitizers
• Jitter Cleaners
• Networked Audio Systems
• Instrumentation
• Low-bandwidth Analog Phase Locked Loop (PLL)
• FPGA Data Recovery

简介

SiT3921属于晶体振荡器谐振器的振荡器。由制造生产的SiT3921振荡器振荡器产品用作频率/时间基准源，与常用于类似用途的晶体产品相比，区别在于它们集成了更多功能，用于生成输出的保持和稳定。最简单的振荡器包括晶体或其他谐振元件，并且具备必要的功能，让用户能够获取频率基准，而无需密切关注谐振元件的工作。更先进的器件还集成了温度补偿或控制功能，以获取更稳定的基准或能够进行选择性调节的基准。