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MAX7400, MAX7403, MAX7404, MAX7407

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

Smallest, Lowest-Power 8th-Order Elliptic Filters
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Status Explanations for product status codes

Active: In Production.

Description

Create a design and simulate using EE-Sim: [MAX7400][MAX7403][MAX7404][MAX7407]

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.

Data Sheet

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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
 

Applications/Uses

  • ADC Anti-Aliasing
  • Air-Bag Electronics
  • CT2 Base Stations
  • Post-DAC Filtering
  • Speech Processing
   

Key Specifications:

Active Filters
Part Number Filter Sections Order Per Filter Section Filter Class Filter Type Filter Characteristic Program Method Lowest Cutoff
(Hz)
Highest Cutoff
(kHz)
VSUPPLY
(V)
Design Tools Oper. Temp.
(°C)
Budgetary
Price
max min See Notes
MAX7400  1 8 Switched Cap Lowpass Elliptic Clock 1 10 5 EE-Sim
-40 to +85
0 to +70
$3.15 @1k
MAX7403  5 $2.94 @1k
MAX7404  3 $2.76 @1k
MAX7407  3 $2.76 @1k
See All Active Filters (50)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.



Diagram

MAX7400, MAX7403, MAX7404, MAX7407: Typical Operating Circuit
Typical Operating Circuit

Notes and Comments

Single 8th-order, elliptic, switched-capacitor filter. 10kHz maximum F (c)

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Information Index

Document Ref.: 19-4764 Rev 2; 1999-06-01
This page last modified: 2007-07-20