MAX7408, MAX7411, MAX7412, MAX

max7408, max7411, max7412, max7415 五阶、低通、椭圆函数、开关电容滤波器
概述
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
应用/使用
adc抗混叠
ct2基站
dac后置滤波
语音处理
max7408, max7411, max7412, max7415典型应用电路

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MAX7408, MAX7411, MAX7412, MAX
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