MAX274 4th and 8th Order Continuous-Time Active Filter Evaluation Kit

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.

• 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