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MAX7408：五阶、低通、椭圆函数、开关电容滤波器

尺寸最小的低功耗5阶滤波器

The MAX7408/MAX7411/MAX7412/MAX7415 5th-order, lowpass, elliptic, switched-capacitor filters (SCFs) operate from a single +5V (MAX7408/MAX7411) or +3V (MAX7412/MAX7415) supply. The devices draw only 1.2mA of supply current and allow corner frequencies from 1Hz to 15kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications. They can be put into a low-power mode, reducing 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. An offset-adjust pin allows for adjustment of the DC output level. The MAX7408/MAX7412 deliver 53dB of stopband rejection and a sharp rolloff with a transition ratio of 1.6. The MAX7411/MAX7415 achieve a sharper rolloff with a transition ratio of 1.25 while still providing 37dB of stop-band rejection. Their fixed response limits the design task to selecting a clock frequency.

关键特性 5th-Order, Elliptic Lowpass Filters Low Noise and Distortion: -80dB THD + Noise Clock-Tunable Corner Frequency (1Hz to 15kHz) Single-Supply Operation +5V (MAX7408/MAX7411) +3V (MAX7412/MAX7415) Low Power 1.2mA (operating mode) 0.2µA (shutdown mode) Available in 8-Pin µMAX®/DIP Packages Low Output Offset: ±4mV

MAX7408、MAX7411、MAX7412、MAX7415：典型工作电路 应用 ADC抗混叠 CT2基站 DAC后置滤波 语音处理

数据手册DataSheet

关键参数

开发工具

• MAXFILTERBRD

技术资料

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

质量和环境数据

• MAX7408.pdf

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