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可由微处理器编程的通用开关电容滤波器

产品详情

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.

主要特征

  • 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

应用/用途

  • 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
Parametric specs for Active Filters
Filter Type Universal
Filter Sections 2
Order Per Filter Section 2
Highest Cutoff (kHz) (min) 140
Lowest Cutoff (Hz) (max) 1
Filter Class Switched Cap
Filter Characteristic Programmable
Program Method µP Bus
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Package/Pins PDIP/24
SOIC (W)/24
Budgetary
Price (See Notes)
$12.10 @1k
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简化框图

MAX260、MAX261、MAX262:功能框图 MAX260、MAX261、MAX262:功能框图 Zoom icon

技术文档

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参量

Parametric specs for Active Filters
Filter Type Universal
Filter Sections 2
Order Per Filter Section 2
Highest Cutoff (kHz) (min) 140
Lowest Cutoff (Hz) (max) 1
Filter Class Switched Cap
Filter Characteristic Programmable
Program Method µP Bus
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Package/Pins PDIP/24
SOIC (W)/24
Budgetary
Price (See Notes)
$12.10 @1k

主要特征

  • 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

应用/用途

  • 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

描述

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.

简化框图

MAX260、MAX261、MAX262:功能框图 MAX260、MAX261、MAX262:功能框图 Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索您所需的答案。

过滤搜索

Maxim专业的应用工程师团队也可以为您解答技术问题,请 访问Maxim的 支持中心