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八阶、低通、巴特沃兹、开关电容滤波器

产品详情

主要特征

应用/用途

Parametric specs for Active Filters
Filter Type Lowpass
Filter Sections 1
Order Per Filter Section 8
Highest Cutoff (kHz) (min) 2
Lowest Cutoff (Hz) (max) 1
Filter Class Switched Cap
Filter Characteristic Butterworth
Program Method Clock
Oper. Temp. (°C) -40 to +85
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
3.19
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参量

Parametric specs for Active Filters
Filter Type Lowpass
Filter Sections 1
Order Per Filter Section 8
Highest Cutoff (kHz) (min) 2
Lowest Cutoff (Hz) (max) 1
Filter Class Switched Cap
Filter Characteristic Butterworth
Program Method Clock
Oper. Temp. (°C) -40 to +85
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
3.19

主要特征

  • 8th-Order, Lowpass Butterworth Filter
  • Low Noise and Distortion: -73dB THD + Noise
  • Clock-Tunable Corner Frequency (1Hz to 2kHz)
  • 100:1 Clock-to-Corner Ratio
  • +5V Single-Supply Operation
  • Low Power
    • 2.9mA (Operating Mode)
    • 0.2µA (Shutdown Mode)
  • Available in 8-Pin SO/DIP Package
  • Low Output Offset: ±5mV

应用/用途

  • ADC抗混叠
  • DAC后置滤波

描述

The MAX7480 8th-order, lowpass, Butterworth, switched-capacitor filter (SCF) operates from a single +5V supply. The device draws only 2.9mA of supply current and allows corner frequencies from 1Hz to 2kHz, making it ideal for low-power post-DAC filtering and anti-aliasing applications. The MAX7480 features a shutdown mode, which reduces the supply current to 0.2µA.

Two clocking options are available: self-clocking (through the use of an external capacitor) or external clocking for tighter corner-frequency control. An offset adjust pin allows for adjustment of the DC output level.

The MAX7480 Butterworth filter provides a maximally flat passband response. The fixed response simplifies the design task to selecting a clock frequency.

简化框图

MAX7480:典型工作电路 MAX7480:典型工作电路 Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心