MAX7426:五阶、低通、椭圆函数、开关电容滤波器

业内功耗最低、尺寸最小的5阶低通滤波器

The MAX7426/MAX7427 5th-order, lowpass, elliptic, switched-capacitor filters (SCFs) operate from a single +5V (MAX7426) or +3V (MAX7427) supply. The devices draw only 0.8mA of supply current and allow corner frequencies from 1Hz to 12kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications. They can be put into a low-power mode, reducing supply current to 0.2µA. Two clocking options are available: self-clocking (through the use of an external capacitor) or external clocking for tighter cutoff-frequency control. An offset-adjust pin allows for adjustment of the DC output level. The MAX7426/MAX7427 deliver 37dB of stopband rejection and a sharp rolloff with a transition ratio of 1.25. Their fixed response limits the design task to selecting a clock frequency.

关键特性
  • 5th-Order, Elliptic Lowpass Filters
  • Low Noise and Distortion: -80dB THD + Noise
  • Clock-Tunable Corner Frequency (1Hz to 12kHz)
  • Single-Supply Operation
    • +5V (MAX7426)
    • +3V (MAX7427)
  • Low Power
    • 0.8mA (Operating Mode)
    • 0.2µA (Shutdown Mode)
  • Available in 8-Pin µMAX®/PDIP Packages
  • Low Output Offset: ±4mV
MAX7426、MAX7427:典型工作电路
MAX7426、MAX7427:典型工作电路
应用
  • ADC抗混叠滤波器
  • DAC后置滤波语音处理
数据手册DataSheet
语言下载文件备注
英文MAX7426-MAX7427.pdfRev 0; 06/2000
关键参数
Part NumberFilter SectionsOrder Per Filter SectionFilter ClassFilter TypeFilter CharacteristicProgram MethodLowest Cutoff
(Hz)
Highest Cutoff
(kHz)
VSUPPLY
(V)
Design ToolsOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxminSee Notes
MAX742615Switched CapLowpassEllipticClock195EE-Sim
  • -40 to +85
  • 0 to +70
  • µMAX/8
  • PDIP(N)/8
$1.44 @1k
MAX7427123
  • µMAX/8
  • PDIP(N)/8
$1.38 @1k
技术资料
相关产品
  • MAX7411:五阶、低通、椭圆函数、开关电容滤波器
  • MAX7415:五阶、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
MAX7426CPA停止供货MAX7426CPA+PDIP(N),;8引脚;79.7mm²0°C至+70°CRoHS/无铅:否
MAX7426CPA+生产中PDIP(N),;8引脚;79.7mm²0°C至+70°CRoHS/无铅:无铅
MAX7426CUA停止供货MAX7426CUA+µMAX,;8引脚;15.6mm²0°C至+70°CRoHS/无铅:否
MAX7426CUA+生产中µMAX,;8引脚;15.6mm²0°C至+70°CRoHS/无铅:无铅
MAX7426CUA+T生产中µMAX,;8引脚;15.6mm²0°C至+70°CRoHS/无铅:无铅
MAX7426CUA-T停止供货MAX7426CUA+TµMAX,;8引脚;15.6mm²0°C至+70°CRoHS/无铅:否
MAX7426EPA停止供货MAX7426EPA+PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:否
MAX7426EPA+生产中PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:无铅
MAX7426EUA停止供货MAX7426EUA+µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
MAX7426EUA+生产中µMAX,;8引脚;15.6mm²-40°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?
MAX7426EUA+T生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX7426EUA-T停止供货MAX7426EUA+TµMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
MAX7426-MAX7427.pdf MAX7427
Generating Switched-Capacitor-Filter Clocks MAX7490
MAX7426-MAX7427.pdf MAX7427