MAX7421

五阶、低通、开关电容滤波器


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说明

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.
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 放大+

关键特性

  • 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

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

请查看具体的参数规格 Active Filters (47)


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
MAX7418 15Switched CapLowpassEllipticClock1305
-40 to +85
0 to +70
UMAX/8
$3.84 @1k
MAX7419 Bessel305
UMAX/8
$5.24 @1k
MAX7420 Butterworth305
UMAX/8
$3.88 @1k
MAX7421 Elliptic305
UMAX/8
$2.92 @1k
MAX7422 Elliptic453
UMAX/8
$3.07 @1k
MAX7423 Bessel453
UMAX/8
$3.70 @1k
MAX7424 Butterworth453
UMAX/8
$3.07 @1k
MAX7425 Elliptic453
UMAX/8
$5.43 @1k

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。

MAXFILTERBRD: MAX7408、MAX7409、MAX7410、MAX7411、MAX7412、MAX7413、MAX7414、MAX7415、MAX7418、MAX7419、MAX7420、MAX7421、MAX7422、MAX7423、MAX7424和MAX7425评估板
产品可靠性报告: MAX7421.pdf 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

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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