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Maxim > Products > Filters (Analog) 
MAX291, MAX292, MAX295, MAX296
8th-Order, Lowpass, Switched-Capacitor Filters

Also See MAX7401/5 8th-Order, Low-Power Bessel Filters


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Data Sheet
FULL DATA SHEET (PDF, 5.9MB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX291/MAX292/MAX295/MAX296 are easy-to-use, 8th-order, lowpass, switched-capacitor filters that can be set up with corner frequencies from 0.1Hz to 25kHz (MAX291/MAX292) or 0.1Hz to 50kHz (MAX295/MAX296).

The MAX291/MAX295 Butterworth filters provide maximally flat passband response, and the MAX292/MAX296 Bessel filters provide low overshoot and fast settling. All four 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 operational amplifier (noninverting input grounded) is provided for building a continuous time lowpass filter for post-filtering or anti-aliasing.

Produced in an 8-pin DIP/SO and a 16-pin wide SO package, and requiring a minimum of external components, the MAX291 series delivers very aggressive performance from a tiny area.

Key Features   Applications/Uses
  • 8th-Order Lowpass Filters:
    • Butterworth (MAX291/MAX295)
    • Bessel (MAX292/MAX296)
  • Clock-Tunable Corner-Frequency Range:
    • 0.1Hz to 25kHz (MAX291/MAX292)
    • 0.1Hz to 50kHz (MAX295/MAX296)
  • No External Resistors or Capacitors Required
  • Internal or External Clock
  • Clock to Corner Frequency Ratio:
    • 100:1 (MAX291/MAX292)
    • 50:1 (MAX295/MAX296)
  • Low Noise: -70dB THD + Noise (Typ)
  • Operate with a Single +5V Supply or Dual ±5V Supplies
  • Uncommitted Op Amp for Anti-Aliasing or Clock-Noise Filtering
  • 8-Pin DIP and SO Packages

 
  		• 50Hz/60Hz Line-Noise Filtering
  		• ADC Anti-Aliasing Filter
  		• DAC Post-Filtering
  		• Noise Analysis

    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) Dual Supply Voltage (±V) Supply Voltage (V) Package Smallest Available Package (max w/pins) (mm2) RoHS Available Operating Temp. Range (°C) Price**
    MAX291  1 8 Switched Cap Lowpass Butterworth Clock 0.1 25 5 5 Ceramic DIP/8
    DICE SALES/0
    PDIP/8
    SOIC/16
    SOIC/8     		31 Yes -40 to +85
    -55 to +125
    0 to +70     		$2.95 @ 1k
    MAX292  Bessel 25 $2.95 @ 1k
    MAX295  Butterworth 50 $2.95 @ 1k
    MAX296  Bessel 50 $2.95 @ 1k
    See All Active Filters (45)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX291, MAX292, MAX295, MAX296: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 1999: Sine Wave Generator Is Crystal Accurate - MAX292

    Evaluation Kits
    none

    Design Guides
  		• FILTERS (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: 1-88 of 88

    MAX291 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX291MJA  
    		Ceramic DIP;8 pin;81 mm²
    Dwg: 21-0045
    Use pkgcode/variation: J8-2*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX291C/D  
    		DICE SALES;0 pin;

    Use pkgcode/variation: DICE*
    		See data sheet
    MAX291CPA+  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX291CPA  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX291EPA+  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX291EPA  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX291CWE-T  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX291CWE  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX291CWE+  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX291CWE+T  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX291EWE+  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX291EWE+T  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX291EWE-T  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX291EWE  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX291CSA+  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX291CSA+T  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX291CSA-T  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-5*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX291CSA  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-5*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX291ESA+T  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX291ESA+  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX291ESA-T  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX291ESA  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX292 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX292MJA  
    		Ceramic DIP;8 pin;81 mm²
    Dwg: 21-0045
    Use pkgcode/variation: J8-2*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX292C/D  
    		DICE SALES;0 pin;

    Use pkgcode/variation: DICE*
    		See data sheet
    MAX292CPA+  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX292CPA  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX292EPA  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX292EPA+  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX292CWE+T  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX292CWE+  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX292CWE-T  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX292CWE  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX292EWE  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX292EWE-T  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX292EWE+  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX292EWE+T  



    		-40°C to +85°C See data sheet
    MAX292CSA  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-5*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX292CSA-T  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-5*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX292CSA+T  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX292CSA+  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX292ESA+  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX292ESA+T  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX292ESA-T  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX292ESA  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX295 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX295MJA  
    		Ceramic DIP;8 pin;81 mm²
    Dwg: 21-0045
    Use pkgcode/variation: J8-2*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX295C/D  
    		DICE SALES;0 pin;

    Use pkgcode/variation: DICE*
    		See data sheet
    MAX295CPA+  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX295CPA  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX295EPA+  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX295EPA  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX295CWE+T  



    		0°C to +70°C See data sheet
    MAX295CWE+  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX295CWE  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX295CWE-T  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX295EWE+  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX295EWE+T  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX295EWE-T  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX295EWE  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX295CSA-T  



    		0°C to +70°C See data sheet
    MAX295CSA+  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX295CSA+T  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX295CSA  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-5*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX295ESA  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX295ESA+  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX295ESA+T  



    		-40°C to +85°C See data sheet
    MAX295ESA-T  



    		-40°C to +85°C See data sheet
    MAX296 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX296MJA  
    		Ceramic DIP;8 pin;81 mm²
    Dwg: 21-0045
    Use pkgcode/variation: J8-2*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX296C/D  
    		DICE SALES;0 pin;

    Use pkgcode/variation: DICE*
    		See data sheet
    MAX296CPA+  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX296CPA  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX296EPA+  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX296EPA  
    		PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX296CWE+T  



    		0°C to +70°C See data sheet
    MAX296CWE-T  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX296CWE  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX296CWE+  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX296EWE+  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX296EWE+T  



    		-40°C to +85°C See data sheet
    MAX296EWE-T  



    		-40°C to +85°C See data sheet
    MAX296EWE  
    		SOIC;16 pin;112 mm²
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX296CSA  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-5*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX296CSA+  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX296CSA+T  



    		0°C to +70°C See data sheet
    MAX296CSA-T  



    		0°C to +70°C See data sheet
    MAX296ESA+T  



    		-40°C to +85°C See data sheet
    MAX296ESA+  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX296ESA  
    		SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX296ESA-T  



    		-40°C to +85°C See data sheet

    Notes and Comments
  		• Single 8th-order, lowpass, switched-capacitor filter

    Related Products
    MAX7401, MAX7405 8th-Order, Lowpass, Bessel, Switched-Capacitor Filters
    MAX7409, MAX7410, MAX7413, MAX7414 5th-Order, Lowpass, Switched-Capacitor Filters

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