MAX26_系列数字编码式滤波器的使用方法

Usage of MAX_26 Series Digital Filter

主要介绍MAX2 6系列 4阶开关电容滤波器的使用方法。给出了其引脚图及各引脚功能 ,指明了其使用的电压频率范围 ,说明了如何进行模式选择以及在不同模式下频率编码输入端和 Q 值编码输入端的设定。总结了其性能优点 ,特别指出了实际应用中应注意的问题。并在理论计算的基础上 ,设计出用MAX2 67实现中心频率 2 2 0Hz ,带宽 6.875Hz的带通滤波电路 ,进一步通过实验测试 ,验证了MAX2

This paper mainly introduces the operation methods of the MAX26 series four-order on off capacitance filter. We provide the pin description, show clearly the applicable range of volt and frequency, demonstrate how to select mode and set up the frequency-encode input and value-encode input under each mode, summarize the virtues of properties, especially point out the problems which should be aware of in actual applications. Then on the basis of theoretic calculation, we have designed the band-pass filter circuit, which can realize center frequency 220?Hz, bandwidth 6.875?Hz by using MAX267. Through experimental test, take further steps to verify the filter effect of MAX26series digital filter.