MAX294:八阶、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

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.

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
MAX293、MAX294、MAX297:典型工作电路
MAX293、MAX294、MAX297:典型工作电路
应用
  • 抗混叠
  • DAC后置滤波
  • 数据采集系统
  • 语音/数据信号滤波
数据手册DataSheet
语言下载文件备注
英文MAX293-MAX297.pdfRev 2; 08/2008
关键参数
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
MAX29318Switched CapLowpassEllipticClock0.12555
  • -55 to +125
  • -40 to +85
  • 0 to +70
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
  • SOIC(W)/16
$4.73 @1k
MAX29425
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
  • SOIC(W)/16
$5.17 @1k
MAX29750
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
  • SOIC(W)/16
$4.68 @1k
质量和环境数据
相关产品
  • MAX7408:五阶、低通、椭圆函数、开关电容滤波器
  • MAX7407:八阶、低通、椭圆函数、开关电容滤波器
  • MAX7400:八阶、低通、椭圆函数、开关电容滤波器
  • MAX7403:八阶、低通、椭圆函数、开关电容滤波器
  • MAX7404:八阶、低通、椭圆函数、开关电容滤波器
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX294C/D停止供货MAX294ESA+DICE SALES,;NA引脚;DICE;0°C至+70°C参考数据资料
MAX294CPA停止供货MAX294CPA+PDIP(N),;8引脚;79.7mm²0°C至+70°CRoHS/无铅:否
MAX294CPA+生产中PDIP(N),;8引脚;79.7mm²0°C至+70°CRoHS/无铅:无铅
MAX294CSA停止供货MAX294CSA+SOIC(N),;8引脚;30.9mm²0°C至+70°CRoHS/无铅:否
MAX294CSA+生产中SOIC(N),;8引脚;30.9mm²0°C至+70°CRoHS/无铅:无铅
MAX294CSA+T生产中N.SO;8引脚0°C至+70°C参考数据资料
MAX294CSA-T停止供货MAX294CSA+TN.SO;8引脚0°C至+70°C参考数据资料
MAX294CWE停止供货MAX294CWE+SOIC(W),;16引脚;111.8mm²0°C至+70°CRoHS/无铅:否
MAX294CWE+生产中SOIC(W),;16引脚;111.8mm²0°C至+70°CRoHS/无铅:无铅
MAX294CWE+T生产中W.SO;16引脚0°C至+70°C参考数据资料
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
MAX294CWE-T停止供货MAX294CWE+TW.SO;16引脚0°C至+70°C参考数据资料
MAX294EPA停止供货MAX294EPA+PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:否
MAX294EPA+生产中PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:无铅
MAX294ESA停止供货MAX294ESA+SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX294ESA+生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX294ESA+T生产中N.SO;8引脚-40°C至+85°C参考数据资料
MAX294ESA-T停止供货MAX294ESA+TN.SO;8引脚-40°C至+85°C参考数据资料
MAX294EWE停止供货MAX294EWE+SOIC(W),;16引脚;111.8mm²-40°C至+85°CRoHS/无铅:否
MAX294EWE+生产中SOIC(W),;16引脚;111.8mm²-40°C至+85°CRoHS/无铅:无铅
MAX294EWE+T生产中SOIC(W),;16引脚;111.8mm²-40°C至+85°CRoHS/无铅:无铅
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
MAX294EWE-T停止供货MAX294EWE+TW.SO;16引脚-40°C至+85°C参考数据资料
MAX294MJA停止供货CDIP(N),;8引脚;82.6mm²-55°C至+125°CRoHS/无铅:否
MAX293-MAX297.pdf MAX297
MAX294.pdf MAX294
MAX293-MAX297.pdf MAX297