MAX7480

八阶、低通、巴特沃兹、开关电容滤波器


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说明

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.
MAX7480:典型工作电路 MAX7480:典型工作电路 放大+

关键特性

  • 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

  • ADC抗混叠
  • DAC后置滤波
Part NumberFilter SectionsOrder Per Filter SectionFilter ClassFilter TypeFilter CharacteristicProgram MethodLowest Cutoff
(Hz)
Highest Cutoff
(kHz)
VSUPPLY
(V)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
maxminSee Notes
MAX7480 18Switched CapLowpassButterworthClock125-40 to +85
PDIP/8
SOIC (N)/8
$3.19 @1k
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Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

技术资料

设计指南 733 A Filter Primer

质量和环境数据

产品可靠性报告: MAX7480.pdf 
无铅封装的锡(Sn)晶须报告
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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相关资料

类型 编号 PDF 标题
设计指南 733 A Filter Primer