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MAX7407：八阶、低通、椭圆函数、开关电容滤波器

尺寸最小的低功耗、8阶椭圆滤波器

The MAX7400/MAX7403/MAX7404/MAX7407 8th-order, lowpass, elliptic, switched-capacitor filters (SCFs) operate from a single +5V (MAX7400/MAX7403) or +3V (MAX7404/MAX7407) supply. These devices draw 2mA of supply current and allow corner frequencies from 1Hz to 10kHz, making them ideal for low-power anti-aliasing and post-DAC filtering applications. They feature a shutdown mode that reduces the supply current to 0.2µA. Two clocking options are available: self-clocking (through the use of an external capacitor) or external clocking for tighter cutoff-frequency control. In addition, an offset adjustment pin (OS) allows for the adjustment of the DC output level. The MAX7400/MAX7404 provide 82dB of stopband rejection and a sharp rolloff with a transition ratio of 1.5. The MAX7403/MAX7407 provide a sharper rolloff with a transition ratio of 1.2, while still delivering 60dB of stopband rejection. The fixed response of these devices simplifies the design task to corner-frequency selection by setting a clock frequency. The MAX7400/MAX7403/MAX7404/MAX7407 are available in 8-pin SO and DIP packages.

关键特性 8th-Order Lowpass Elliptic Filter Low Noise and Distortion -82dB THD + Noise (MAX7400) Clock-Tunable Corner Frequency (1Hz to 10kHz) 100:1 Clock-to-Corner Ratio Single-Supply Operation +5V (MAX7400/MAX7403) +3V (MAX7404/MAX7407) Low Power 2mA (Operating Mode) 0.2µA (Shutdown Mode) Available in 8-Pin SO and DIP Packages Low Output Offset: ±5mV

MAX7400、MAX7403、MAX7404、MAX7407：典型工作电路 应用 ADC抗混叠 气囊电子装置 CT2基站 DAC后置滤波 语音处理

数据手册DataSheet

关键参数

技术资料

• Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface
• A Filter Primer

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