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MAX296：八阶、低通、开关电容滤波器

请参考MAX7401/MAX7405 8阶、低功耗贝塞尔滤波器

The MAX291/MAX292/MAX295/MAX296 are easy-to-use, 8th-order, lowpass, switched-capacitor filters that can be set up with corner frequencies from 0.1Hz to 25kHz (MAX291/MAX292) or 0.1Hz to 50kHz (MAX295/MAX296). The MAX291/MAX295 Butterworth filters provide maximally flat passband response, and the MAX292/MAX296 Bessel filters provide low overshoot and fast settling. All four filters have fixed responses, so the design task is limited to selecting the clock frequency that controls the filter's corner frequency. An external capacitor is used to generate a clock using the internal oscillator, or an external clock signal can be used. An uncommitted operational amplifier (noninverting input grounded) is provided for building a continuous time lowpass filter for post-filtering or anti-aliasing. Produced in an 8-pin DIP/SO and a 16-pin wide SO package, and requiring a minimum of external components, the MAX291 series delivers very aggressive performance from a tiny area.

关键特性 8th-Order Lowpass Filters: Butterworth (MAX291/MAX295) Bessel (MAX292/MAX296) Clock-Tunable Corner-Frequency Range: 0.1Hz to 25kHz (MAX291/MAX292) 0.1Hz to 50kHz (MAX295/MAX296) No External Resistors or Capacitors Required Internal or External Clock Clock to Corner Frequency Ratio: 100:1 (MAX291/MAX292) 50:1 (MAX295/MAX296) Low Noise: -70dB THD + Noise (Typ) Operate with a Single +5V Supply or Dual ±5V Supplies Uncommitted Op Amp for Anti-Aliasing or Clock-Noise Filtering 8-Pin DIP and SO Packages

MAX291、MAX292、MAX295、MAX296：典型工作电路 应用 50Hz/60Hz电源噪声滤波 ADC抗混叠滤波器 DAC后置滤波 噪声分析

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