MAX7421 - 五阶、低通、开关电容滤波器

MAX7421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，MAX7421是五阶、低通、开关电容滤波器，本站介绍了MAX7421的封装应用图解、特点和优点、功能等，并给出了与MAX7421相关的Maxim元器件型号供参考。

MAX7421 - 五阶、低通、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

产品概述

The MAX7418–MAX7425 5th-order, low-pass, switched-capacitor filters (SCFs) operate from a single +5V (MAX7418–MAX7421) or +3V (MAX7422–MAX7425) supply. These devices draw only 3mA of supply current and allow corner frequencies from 1Hz to 45kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications. They feature a shutdown mode that reduces supply current to 0.2µA.

Two clocking options are available: self-clocking (through the use of an external capacitor), or external clocking for tighter corner-frequency control. An offset adjust pin allows for adjustment of the DC output level.

The MAX7418/MAX7422 deliver 53dB of stopband rejection and a sharp rolloff with a 1.6 transition ratio. The MAX7421/MAX7425 achieve a sharper rolloff with a 1.25 transition ratio while still providing 37dB of stopband rejection. The MAX7419/MAX7423 Bessel filters provide low overshoot and fast settling, and the MAX7420/MAX7424 Butterworth filters provide a maximally flat passband response. Their fixed response simplifies the design task of selecting a clock frequency.

关键特性

以下关键特性由Maxim美信半导体提供：

5th-Order, Lowpass Filters

Elliptic Response (MAX7418/MAX7421/MAX7422/MAX7425)

Bessel Response (MAX7419/MAX7423)

Butterworth Response (MAX7420/MAX7424)

Clock-Turnable Corner Frequency (1Hz to 45kHz)

Single-Supply Operation

+5V (MAX7418–MAX7421)

+3V (MAX7422–MAX7425)

Low Power

3mA (Operating Mode)

0.2µA (Shutdown Mode)

Available in 8-Pin µMAX® Package

Low Output Offset: ±4mV

热门应用

ADC抗混叠

CT2基站

DAC后置滤波

语音处理

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