MAX268BEWG-T

The MAX263/264 and MAX267/268 CMOS switched-capacitor active filters are designed for precision filtering applications. Center frequency, Q, and operating mode are all selected via pin-strapped inputs. The MAX263/264 uses no external components for a variety of bandpass, lowpass, highpass, notch and allpass filters. The MAX267/268 is dedicated to bandpass applications and includes an uncommitted op-amp. Two second-order filter sections are included in both devices. An input clock and a 5-bit programming input precisely set the filter center/corner frequency. Q is also programmed from 0.5 to 64. Separate clock inputs for each filter half operate either an external clock or a crystal. The MAX263 and 267 operate with center frequencies up to 57kHz while the MAX264 and 268 extend the f0 range to 140kHz by employing lower fCLK/f0 ratios. The MAX263/264 is supplied in 28 pin wide DIP and small outline packages while the MAX267/268 is supplied in 24 pin narrow DIP and wide SO packages. All devices are available in commercial, extended, and military temperature ranges.

characterization

• 32-Step Center Frequency Control
• 128-Step Q Control
• Independent Q and f₀ Programming
• Guaranteed Clock to f₀ Ratio—1% (A grade)
• 75kHz f₀ Range (MAX264/268)
• Single +5V and ±5V Operation

(Product Image: Diagram)

Technical Parameters

• 
  Number of Channels
  
• 
  2
  
• 
  Cutoff Frequency
  
• 
  140 kHz
  
• 
  Supply Voltage Max
  
• 
  12.6 V
  
• 
  Supply Voltage Min
  
• 
  4.74 V
  
• 
  Maximum Operating Temperature
  
• 
  + 85 C
  
• 
  Mounting Style
  
• 
  SMD/SMT
  
• 
  Package / Case
  
• 
  SOIC-24 Wide
  
• 
  Packaging
  
• 
  Reel
  
• 
  Minimum Operating Temperature
  
• 
  – 40 C
  

MAX268BEWG-T Datasheet

• MAX268 data sheet for guidance

  downloading