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MAX261：可由微处理器编程的通用开关电容滤波器

The MAX260/MAX261/MAX262 CMOS dual second-order universal switched-capacitor active filters allow microprocessor control of precise filter functions. No external components are required for a variety of bandpass, lowpass, highpass, notch, and allpass configurations. Each device contains two second-order filter sections that place center frequency, Q, and filter operating mode under programmed control. An input clock, along with a 6-bit f0 program input, determine the filter's center or corner frequency without affecting other filter parameters. The filter Q is also programmed independently. Separate clock inputs for each filter section operate with either a crystal, RC network, or external clock generator. The MAX260 has offset and DC specifications superior to the MAX261 and MAX262 and a center frequency (f0) range of 7.5kHz. The MAX261 handles center frequencies to 57kHz, while the MAX262 extends the center frequency range to 140kHz by employing lower clock-to-f0 ratios. All devices are available in 24-pin DIP and small outline packages in commercial, extended, and military temperature ranges.

关键特性 Filter Design Software Available Microprocessor Interface 64-Step Center Frequency Control 128-Step Q Control Independent Q and f0 Programming Guaranteed Clock to f0 Ratio-1% (A grade) 75kHz f0 Range (MAX262) Single +5V and ±5V Operation

MAX260、MAX261、MAX262：功能框图 应用 µP调节滤波器 自适应滤波器 抗混叠滤波器 数字信号处理(DSP) 锁相环(PLL) 信号分析

数据手册DataSheet

关键参数

质量和环境数据

• MAX261.pdf

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• MAX267：引脚可编程的通用及带通滤波器
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• MAX263：引脚可编程的通用及带通滤波器
• MAX268：引脚可编程的通用及带通滤波器
• MAX265：可用电阻或引脚编程的通用开关电容滤波器
• MAX266：可用电阻或引脚编程的通用开关电容滤波器

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