MAX7491是Maxim美信半导体公司的一款滤波器(连续模式和开关电容)产品，MAX7491是双路、通用开关电容滤波器，本站介绍了MAX7491的封装应用图解、特点和优点、功能等，并给出了与MAX7491相关的Maxim元器件型号供参考。
MAX7491 - 双路、通用开关电容滤波器 - 滤波器(连续模式和开关电容) - Maxim美信半导体高性能芯片品质 - 美信半导体
The MAX7490/MAX7491 consist of two identical low-power,low-voltage, wide dynamic range, rail-to-rail,2nd-order switched-capacitor building blocks. Each ofthe two filter sections, together with two to four externalresistors, can generate all standard 2nd-order functions:bandpass, lowpass, highpass, and notch (bandreject). Three of these functions are simultaneouslyavailable. Fourth-order filters can be obtained by cascadingthe two 2nd-order filter sections. Similarly, higherorder filters can easily be created by cascadingmultiple MAX7490/MAX7491s.
Two clocking options are available: self-clocking(through the use of an external capacitor) or externalclocking for tighter cutoff frequency control. The clock-to-center frequency ratio is 100:1. Sampling is done attwice the clock frequency, further separating the cutofffrequency and Nyquist frequency.
The MAX7490/MAX7491 have an internal rail splitterthat establishes a precise common voltage needed forsingle-supply operation. The MAX7490 operates from asingle +5V supply and the MAX7491 operates from asingle +3V supply. Both devices feature a low-powershutdown mode and come in a 16-pin QSOP package.
