MAX7400:8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters

Smallest, Lowest-Power 8th-Order Elliptic Filters

The MAX7400/MAX7403/MAX7404/MAX7407 8th-order, lowpass, elliptic, switched-capacitor filters (SCFs) operate from a single +5V (MAX7400/MAX7403) or +3V (MAX7404/MAX7407) supply. These devices draw 2mA of supply current and allow corner frequencies from 1Hz to 10kHz, making them ideal for low-power anti-aliasing and post-DAC filtering applications. They feature a shutdown mode that 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 cutoff-frequency control. In addition, an offset adjustment pin (OS) allows for the adjustment of the DC output level. The MAX7400/MAX7404 provide 82dB of stopband rejection and a sharp rolloff with a transition ratio of 1.5. The MAX7403/MAX7407 provide a sharper rolloff with a transition ratio of 1.2, while still delivering 60dB of stopband rejection. The fixed response of these devices simplifies the design task to corner-frequency selection by setting a clock frequency. The MAX7400/MAX7403/MAX7404/MAX7407 are available in 8-pin SO and DIP packages.

Key Features
  • 8th-Order Lowpass Elliptic Filter
  • Low Noise and Distortion -82dB THD + Noise (MAX7400)
  • Clock-Tunable Corner Frequency (1Hz to 10kHz)
  • 100:1 Clock-to-Corner Ratio
  • Single-Supply Operation
    • +5V (MAX7400/MAX7403)
    • +3V (MAX7404/MAX7407)
  • Low Power
    • 2mA (Operating Mode)
    • 0.2µA (Shutdown Mode)
  • Available in 8-Pin SO and DIP Packages
  • Low Output Offset: ±5mV
MAX7400, MAX7403, MAX7404, MAX7407: Typical Operating Circuit
MAX7400, MAX7403, MAX7404, MAX7407: Typical Operating Circuit
Applications/Uses
  • ADC Anti-Aliasing
  • Air-Bag Electronics
  • CT2 Base Stations
  • Post-DAC Filtering
  • Speech Processing
DataSheet
titleDownload file
MAX7400-MAX7407 Data SheetMAX7400-MAX7407.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
MAX740018Switched CapLowpassEllipticClock1105EE-Sim-40 to +85
0 to +70
PDIP(N)/8
SOIC(N)/8
$3.15 @1k
MAX74035PDIP(N)/8
SOIC(N)/8
$2.94 @1k
MAX74043PDIP(N)/8
SOIC(N)/8
$2.76 @1k
MAX74073PDIP(N)/8
SOIC(N)/8
$2.76 @1k
Quality and Environmental Data
Related Products
  • MAX7408:5th Order, Lowpass, Elliptic, Switched-Capacitor Filters
  • MAX7411:5th Order, Lowpass, Elliptic, Switched-Capacitor Filters
  • MAX7415:5th Order, Lowpass, Elliptic, Switched-Capacitor Filters
  • MAX7412:5th Order, Lowpass, Elliptic, Switched-Capacitor Filters
  • MAX294:8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters
  • MAX297:8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters
  • MAX293:8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX7400CPANo Longer AvailableMAX7400CPA+PDIP(N),;8 pin;79.7 mm²0°C to +70°CNo
MAX7400CPA+ActivePDIP(N),;8 pin;79.7 mm²0°C to +70°CLead Free
MAX7400CSANo Longer AvailableMAX7400CSA+SOIC(N),;8 pin;30.9 mm²0°C to +70°CNo
MAX7400CSA+ActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
MAX7400CSA+TActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
MAX7400CSA-TNo Longer AvailableMAX7400CSA+TN.SO;8 pin0°C to +70°CSee data sheet
MAX7400EPANo Longer AvailableMAX7400EPA+PDIP(N),;8 pin;79.7 mm²-40°C to +85°CNo
MAX7400EPA+ActivePDIP(N),;8 pin;79.7 mm²-40°C to +85°CLead Free
MAX7400ESANo Longer AvailableMAX7400ESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX7400ESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX7400ESA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX7400ESA-TNo Longer AvailableMAX7400ESA+TN.SO;8 pin-40°C to +85°CSee data sheet
MAX7400-MAX7407.pdf MAX7407
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