MAX297

八阶、低通、椭圆函数、开关电容滤波器

低功耗应用请参考MAX7400/MAX7403/MAX7404/MAX7407


点击查看特定型号的库存状况。

说明

The MAX293/MAX294/MAX297 are easy-to-use, 8th-order, lowpass, elliptic, switched-capacitor filters that can be set up with corner frequencies from 0.1Hz to 25kHz (MAX293/MAX294) or from 0.1Hz to 50kHz (MAX297).

The MAX293/MAX297's 1.5 transition ratio provides sharp rolloff and -80dB of stopband rejection. The MAX294's 1.2 transition ratio provides the steepest rolloff and -58dB of stopband rejection. All three filters have fixed responses, so the design task is limited to selecting the clock frequency that controls the filter's corner frequency.

An external capacitor is used to generate a clock using the internal oscillator, or an external clock signal can be used. An uncommitted op amp (noninverting input grounded) is provided for building a continuous-time lowpass filter for post-filtering or anti-aliasing. Steep rolloff and high order make these filters ideal for anti-aliasing applications that require maximum bandwidth, and for communication applications that require filtering signals in close proximity within the frequency domain.

The MAX293/MAX294/MAX297 are available in 8-pin DIP and 16-pin wide SO packages, delivering aggressive performance from a tiny area.
MAX293、MAX294、MAX297:典型工作电路 MAX293、MAX294、MAX297:典型工作电路 放大+

关键特性

  • 8th-Order Lowpass Elliptic Filters
  • Clock-Tunable Corner-Frequency Range:
    • 0.1Hz to 25kHz (MAX293/MAX294)
    • 0.1Hz to 50kHz (MAX297)
  • No External Resistors or Capacitors Required
  • Internal or External Clock
  • Clock to Corner Frequency Ratio
    • 100:1 (MAX293/MAX294)
    • 50:1 (MAX297)
  • Operate with a Single +5V Supply or Dual ±5V Supplies
  • Uncommitted Op Amp for Anti-Aliasing or Clock-Noise Filtering
  • 8-Pin DIP and 16-Pin Wide SO Packages

应用

  • 抗混叠
  • DAC后置滤波
  • 数据采集系统
  • 语音/数据信号滤波
Part NumberFilter SectionsOrder Per Filter SectionFilter ClassFilter TypeFilter CharacteristicProgram MethodLowest Cutoff
(Hz)
Highest Cutoff
(kHz)
VSUPPLY (Dual)
(±V)
VSUPPLY
(V)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
maxminDualSee Notes
MAX293 18Switched CapLowpassEllipticClock0.12555
-55 to +125
-40 to +85
0 to +70
CDIP/8
PDIP/8
SOIC (N)/8
SOIC (W)/16
$4.73 @1k
MAX294 25
CDIP/8
PDIP/8
SOIC (N)/8
SOIC (W)/16
$6.01 @1k
MAX297 50
CDIP/8
PDIP/8
SOIC (N)/8
SOIC (W)/16
$4.68 @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

应用笔记 4504 Locked-Sync Sine Generator Covers Three Decades with Low Distortion

质量和环境数据

产品可靠性报告: MAX297.pdf 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX297CPA
  • MAX297CPA+
  • MAX297CSA
  • MAX297CSA+
  • MAX297CSA+T
  • MAX297CSA-T
  • MAX297CWE
  • MAX297CWE+
  • MAX297CWE+T
  • MAX297CWE-T
  • MAX297EPA
  • MAX297EPA+
  • MAX297ESA
  • MAX297ESA+
  • MAX297ESA+T
  • MAX297ESA-T
  • MAX297EWE
  • MAX297EWE+
  • MAX297EWE+T
  • MAX297EWE-T
  • MAX297MJA
  • 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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