5th-Order, Lowpass, Switched-Capacitor Filters

 

Part Number	Replacement	Explanation

Description

Create a design and simulate using EE-Sim^® tools:

The MAX7409/MAX7410/MAX7413/MAX7414 5th-order, lowpass, switched-capacitor filters (SCFs) operate from a single +5V (MAX7409/MAX7410) or +3V (MAX7413/ MAX7414) supply. These devices draw only 1.2mA of supply current and allow corner frequencies from 1Hz to 15kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications. They feature a shutdown mode, which reduces the supply current to 0.2µA.

Two clocking options are available on these devices: 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 MAX7409/MAX7413 Bessel filters provide low overshoot and fast settling, while the MAX7410/MAX7414 Butterworth filters provide a maximally flat passband response. Their fixed response simplifies the design task to selecting a clock frequency.

MAX7409, MAX7410, MAX7413, MAX7414: Typical Operating Circuit Enlarge+

Key Features

• 5th-Order Lowpass Filters
  • Bessel Response (MAX7409/MAX7413)
    
  • Butterworth Response (MAX7410/MAX7414)
• Clock-Tunable Corner Frequency (1Hz to 15kHz)
• Single-Supply Operation
  • +5V (MAX7409/MAX7410)
  • +3V (MAX7413/MAX7414)
• Low Power
  • 1.2mA (operating mode)
  • 0.2µA (shutdown mode)
• Available in 8-Pin µMAX®/DIP Packages
• Low Output Offset: ±4mV
• Single 5th-order, Bessel and Butterworth switched-capacitor filters. 15kHz maximum F (c)

Applications/Uses

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