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五阶、低通、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 5
Highest Cutoff (kHz) (min) 45
Lowest Cutoff (Hz) (max) 1
Filter Class Switched Cap
Filter Characteristic Elliptic
Program Method Clock
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins UMAX/8
Budgetary
Price (See Notes)
$3.07 @1k
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简化框图

技术文档

数据资料 五阶、低通、开关电容滤波器 Nov 01, 2000

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参量

Parametric specs for Active Filters
Filter Type Lowpass
Filter Sections 1
Order Per Filter Section 5
Highest Cutoff (kHz) (min) 45
Lowest Cutoff (Hz) (max) 1
Filter Class Switched Cap
Filter Characteristic Elliptic
Program Method Clock
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins UMAX/8
Budgetary
Price (See Notes)
$3.07 @1k

主要特征

  • 5th-Order, Lowpass Filters
    • Elliptic Response (MAX7418/MAX7421/MAX7422/MAX7425)
    • Bessel Response (MAX7419/MAX7423)
    • Butterworth Response (MAX7420/MAX7424)
  • Clock-Turnable Corner Frequency (1Hz to 45kHz)
  • Single-Supply Operation
    • +5V (MAX7418–MAX7421)
    • +3V (MAX7422–MAX7425)
  • Low Power
    • 3mA (Operating Mode)
    • 0.2µA (Shutdown Mode)
  • Available in 8-Pin µMAX® Package
  • Low Output Offset: ±4mV

应用/用途

  • ADC抗混叠
  • CT2基站
  • DAC后置滤波
  • 语音处理

描述

The MAX7418–MAX7425 5th-order, low-pass, switched-capacitor filters (SCFs) operate from a single +5V (MAX7418–MAX7421) or +3V (MAX7422–MAX7425) supply. These devices draw only 3mA of supply current and allow corner frequencies from 1Hz to 45kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications. They feature a shutdown mode that reduces 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 MAX7418/MAX7422 deliver 53dB of stopband rejection and a sharp rolloff with a 1.6 transition ratio. The MAX7421/MAX7425 achieve a sharper rolloff with a 1.25 transition ratio while still providing 37dB of stopband rejection. The MAX7419/MAX7423 Bessel filters provide low overshoot and fast settling, and the MAX7420/MAX7424 Butterworth filters provide a maximally flat passband response. Their fixed response simplifies the design task of selecting a clock frequency.

简化框图

MAX7418、MAX7419、MAX7420、MAX7421、MAX7422、MAX7423、MAX7424、MAX7425:典型工作电路 MAX7418、MAX7419、MAX7420、MAX7421、MAX7422、MAX7423、MAX7424、MAX7425:典型工作电路 Zoom icon

技术文档

数据资料 五阶、低通、开关电容滤波器 Nov 01, 2000

支持和培训

在Maxim的知识库中搜索解决技术问题所需的答案。

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