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Maxim > Products > Filters (Analog) 
MAX7418, MAX7419, MAX7420, MAX7421, MAX7422, MAX7423, MAX7424, MAX7425
5th-Order, Lowpass, Switched-Capacitor Filters


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Data Sheet
FULL DATA SHEET (PDF, 412kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
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.

Key Features   Applications/Uses
  • 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

 
  		• ADC Anti-Aliasing
  		• CT2 Base Stations
  		• DAC Post-Filtering
  		• Speech Processing

    Key Specifications:   Active Filters
    Part Number Filter Sections per Pkg. Order per Filter Section Filter Class Filter Type Filter Characteristic Program Method Lowest Cutoff (Hz) Highest Cutoff (kHz) Supply Voltage (V) Operating Temp. Range (°C)
    MAX7418  1 5 Switched Cap Lowpass Elliptic Clock 1 30 5 -40 to +85
    0 to +70
    MAX7419  Bessel 30 5
    MAX7420  Butterworth 30 5
    MAX7421  Elliptic 30 5
    MAX7422  Elliptic 45 3
    MAX7423  Bessel 45 3
    MAX7424  Butterworth 45 3
    MAX7425  Elliptic 45 3
    See All Active Filters (45)

    Diagram
    MAX7418, MAX7419, MAX7420, MAX7421, MAX7422, MAX7423, MAX7424, MAX7425: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 928: Filter Basics: Anti-Aliasing - MAX7418, MAX7419
  		• Application Note 3494: The Basics of Anti-Aliasing: Using Switched-Capacitor Filters - MAX7418, MAX7419, MAX7420, MAX7421

    Evaluation Kits
    none

    Design Guides
  		• FILTERS (PDF)
  		• A/D CONVERTERS (PDF)

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-64 of 64

    MAX7418 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX7418CUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7418CUA+T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7418EUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7418EUA+T  



    		-40°C to +85°C See data sheet
    MAX7418CUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7418CUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7418EUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7418EUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7419 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX7419CUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7419CUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7419CUA+T  



    		0°C to +70°C See data sheet
    MAX7419CUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7419EUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7419EUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7419EUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7419EUA+T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7420 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX7420CUA+T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7420CUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7420CUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7420CUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7420EUA+T  



    		-40°C to +85°C See data sheet
    MAX7420EUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7420EUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7420EUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7421 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX7421CUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7421CUA+T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7421CUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7421CUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7421EUA+T  



    		-40°C to +85°C See data sheet
    MAX7421EUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7421EUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7421EUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7422 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX7422CUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7422CUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7422CUA+T  



    		0°C to +70°C See data sheet
    MAX7422CUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7422EUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7422EUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7422EUA+T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7422EUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7423 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX7423CUA+T  



    		0°C to +70°C See data sheet
    MAX7423CUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7423CUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7423CUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7423EUA+T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7423EUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7423EUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7423EUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7424 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX7424CUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7424CUA+T  



    		0°C to +70°C See data sheet
    MAX7424EUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7424EUA+T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7424CUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7424CUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7424EUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7424EUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7425 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX7425CUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7425CUA+T  



    		0°C to +70°C See data sheet
    MAX7425CUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7425CUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7425EUA+T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX7425EUA-T  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7425EUA  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX7425EUA+  
    		uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• New Product Press Release 2000-11-07 

    Related Products
    MAX7408, MAX7411, MAX7412, MAX7415 5th Order, Lowpass, Elliptic, Switched-Capacitor Filters
    MAX7409, MAX7410, MAX7413, MAX7414 5th-Order, Lowpass, Switched-Capacitor Filters

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     Description 
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    Document Ref.: 19-1821; Rev 0; 2000-11-01
    This page last modified: 2007-07-24




             


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