MAX274, MAX274EVKIT:4th- and 8th-Order, Continuous-Time Active Filters

Low-Noise Continuous-Time Filters Eliminate Clock Noise and Aliasing

The MAX274 and MAX275 are continuous-time active filters consisting of independent cascadable 2nd-order sections. Each section can implement any all-pole bandpass or lowpass filter response, such as Butterworth, Bessel, Chebyshev, and is programmed by four external resistors. The MAX274/MAX275 provide lower noise that switched-capacitor filters, as well as superior dynamic performance—both due to the continuous-time design. Since continuous-time filters do not require a clock, aliased and clock noise are eliminated with the MAX274/MAX275. The MAX274 comprises of four 2nd-order sections, permitting 8th-order filters to be realized. Center frequencies range up to 150kHZ, and are accurate to within ±1% over the full operating temperature range. Total harmonic distortion (THD) is typically better than -86dB. The MAX275 comprises of two 2nd-order sections, permitting 4th-order filters to be realized. Center frequencies range up to 300kHZ, and are accurate to within ±0.9% over the full operating temperature range. Total harmonic distortion (THD) is typically better than -86dB. Both filters operate from a single +5V supply or from dual ±5V supplies.

Key Features
  • Continuous-TIme Filter - No Clock, No Clock Noise
  • Implement Butterworth, Chebyshev, Bessel and Other Filter Responses
  • Lowpass, Bandpass Outputs
  • Operate from a Single +5V Supply or Dual ±5V Supplies
  • Design Software Available
  • MAX274 Evaluation Kit Available
  • 8th-Order-Four 2nd-Order Sections (MAX274)
  • 4th-Order-Two 2nd-Order Sections (MAX275)
  • Center-Frequency Range:
    • 150kHz for MAX274
    • 300kHz for MAX275
  • Low Noise:
    • -86dB THD Typical for MAX274
    • -89dB THD Typical for MAX275
  • Center-Frequency Accurate Over Temp:
    • within ±1% for MAX274
    • within ±0.9% for MAX275
MAX274, MAX274EVKIT, MAX275: Typical Operating Circuit
MAX274, MAX274EVKIT, MAX275: Typical Operating Circuit
Applications/Uses
  • Audio/Sonar/Avionics Frequency Filtering
  • DAC Output-Smoothing Filters
  • Low-Distortion Anti-Aliasing Filters
  • Modems
  • Vibration Analysis
DataSheet
TitleDownload file
MAX274-MAX275 Data SheetMAX274-MAX275.pdf
Parametrics
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
MAX27442ContinuousBandpass
Lowpass
ProgrammableResistor10015055-55 to +125
-40 to +85
0 to +70
CDIP(N)/24
PDIP(N)/24
SOIC(W)/28
$6.22 @1k
MAX2752300CDIP(N)/20
PDIP(N)/20
SOIC(W)/20
$5.01 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackage
MAX274ACNGNo Longer AvailableMAX274ACNG+PDIP(N),;24 pin;158.4 mm²
MAX274ACNG+ActivePDIP(N),;24 pin;158.4 mm²
MAX274ACWINo Longer AvailableMAX274ACWI+SOIC(W),;28 pin;192.8 mm²
MAX274ACWI+ActiveSOIC(W),;28 pin;192.8 mm²
MAX274ACWI+TActiveSOIC(W),;28 pin;192.8 mm²
MAX274ACWI-TNo Longer AvailableMAX274ACWI+TSOIC(W),;28 pin;192.8 mm²
MAX274AENGNo Longer AvailableMAX274AENG+PDIP(N),;24 pin;158.4 mm²
MAX274AENG+ActivePDIP(N),;24 pin;158.4 mm²
MAX274AEWINo Longer AvailableMAX274AEWI+SOIC(W),;28 pin;192.8 mm²
MAX274AEWI+ActiveSOIC(W),;28 pin;192.8 mm²
Part NumberStatusRecommended ReplacementPackage
MAX274AEWI+TActiveSOIC(W),;28 pin;192.8 mm²
MAX274AEWI-TNo Longer AvailableMAX274AEWI+TW.SO;28 pin
MAX274AMRGNo Longer AvailableSDBRZ;24 pin
MAX274AMYGNo Longer AvailableCDIP(N),;24 pin;256 mm²
MAX274AMYG/883BNo Longer AvailableCDIP(N),;24 pin;256 mm²
MAX274BC/DNRNDMAX274AEWI+DICE SALES,;NA pin;DICE S;
MAX274BCNGNo Longer AvailableMAX274BCNG+PDIP(N),;24 pin;158.4 mm²
MAX274BCNG+ActivePDIP(N),;24 pin;158.4 mm²
MAX274BCWINo Longer AvailableMAX274BCWI+SOIC(W),;28 pin;192.8 mm²
MAX274BCWI+ActiveSOIC(W),;28 pin;192.8 mm²
Part NumberStatusRecommended ReplacementPackage
MAX274BCWI+TActiveSOIC(W),;28 pin;192.8 mm²
MAX274BCWI-TNo Longer AvailableMAX274BCWI+TSOIC(W),;28 pin;192.8 mm²
MAX274BENGNo Longer AvailableMAX274BENG+PDIP(N),;24 pin;158.4 mm²
MAX274BENG+ActivePDIP(N),;24 pin;158.4 mm²
MAX274BEWINo Longer AvailableMAX274BEWI+SOIC(W),;28 pin;192.8 mm²
MAX274BEWI+ActiveSOIC(W),;28 pin;192.8 mm²
MAX274BEWI+TActiveSOIC(W),;28 pin;192.8 mm²
MAX274BEWI-TNo Longer AvailableMAX274BEWI+TW.SO;28 pin
MAX274BMRGNo Longer AvailableSDBRZ;24 pin
MAX274BMYGNo Longer AvailableCDIP(N),;24 pin;256 mm²
Part NumberStatusRecommended ReplacementPackage
MAX274BMYG/883BNo Longer AvailableCDIP(N),;24 pin;256 mm²
MAX274EVKIT-DIPNo Longer AvailableMAX274EVKIT-DIP+EVKIT;
MAX274EVKIT-DIP+ActiveEVKIT;
MAX274SOFTNo Longer AvailableuMAX;
MAX274-MAX275.pdf MAX275
Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface MAX5492
A Beginner's Guide to Filter Topologies MAX275
MAX274.pdf MAX274
MAX274-MAX275.pdf MAX275