MAX7480:8th-Order, Lowpass, Butterworth, Switched-Capacitor Filter

The MAX7480 8th-order, lowpass, Butterworth, switched-capacitor filter (SCF) operates from a single +5V supply. The device draws only 2.9mA of supply current and allows corner frequencies from 1Hz to 2kHz, making it ideal for low-power post-DAC filtering and anti-aliasing applications. The MAX7480 features a shutdown mode, which reduces the 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 MAX7480 Butterworth filter provides a maximally flat passband response. The fixed response simplifies the design task to selecting a clock frequency.

Key Features
  • 8th-Order, Lowpass Butterworth Filter
  • Low Noise and Distortion: -73dB THD + Noise
  • Clock-Tunable Corner Frequency (1Hz to 2kHz)
  • 100:1 Clock-to-Corner Ratio
  • +5V Single-Supply Operation
  • Low Power
    • 2.9mA (Operating Mode)
    • 0.2µA (Shutdown Mode)
  • Available in 8-Pin SO/DIP Package
  • Low Output Offset: ±5mV
MAX7480: Typical Operating Circuit
MAX7480: Typical Operating Circuit
Applications/Uses
  • ADC Anti-Aliasing
  • Post-DAC Filtering
DataSheet
titleDownload file
MAX7480 Data SheetMAX7480.pdf
Parametrics
Part NumberFilter SectionsOrder Per Filter SectionFilter ClassFilter TypeFilter CharacteristicProgram MethodLowest Cutoff
(Hz)
Highest Cutoff
(kHz)
VSUPPLY
(V)
Design ToolsOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxminSee Notes
MAX748018Switched CapLowpassButterworthClock125EE-Sim-40 to +85PDIP(N)/8
SOIC(N)/8
$3.04 @1k
Quality and Environmental Data
Related Products
  • MAX291:8th-Order, Lowpass, Switched-Capacitor Filters
  • MAX295:8th-Order, Lowpass, Switched-Capacitor Filters
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX7480EPANo Longer AvailableMAX7480EPA+PDIP(N),;8 pin;79.7 mm²-40°C to +85°CNo
MAX7480EPA+ActivePDIP(N),;8 pin;79.7 mm²-40°C to +85°CLead Free
MAX7480ESANo Longer AvailableMAX7480ESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX7480ESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX7480ESA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX7480ESA-TNo Longer AvailableMAX7480ESA+TN.SO;8 pin-40°C to +85°CSee data sheet
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MAX7480.pdf MAX7480
MAX7480.pdf MAX7480
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