Universal Active Filter - UAF42

UAF42 (ACTIVE)

Universal Active Filter

 

Description

The UAF42 is a universal active filter that can be configured for a wide range of low-pass, high-pass, and band-pass filters. It uses a classic state-variable analog architecture with an inverting amplifier and two integrators. The integrators include on-chip 1000pF capacitors trimmed to 0.5%. This architecture solves one of the most difficult problems of active filter design—obtaining tight tolerance, low-loss capacitors.

A DOS-compatible filter design program allows easy implementation of many filter types, such as Butterworth, Bessel, and Chebyshev. A fourth, uncommitted FET-input op amp (identical to the other three) can be used to form additional stages, or for special filters such as band-reject and Inverse Chebyshev.

The classical topology of the UAF42 forms a time-continuous filter, free from the anomalies and switching noise associated with switched-capacitor filter types.

The UAF42 is available in 14-pin plastic DIP and SOIC-16 surface-mount packages, specified for the –25°C to +85°C temperature range.

Features

  • VERSATILE:
    • Low-Pass, High-Pass
    • Band-Pass, Band-Reject
  • SIMPLE DESIGN PROCEDURE
  • ACCURATE FREQUENCY AND Q:
    • Includes On-Chip 1000pF ±0.5% Capacitors

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Parametrics Compare all products in Frequency Converters

 
Vs (Min) (V)
Vs (Max) (V)
Operating Temperature Range (C)
Pin/Package
Package Group
Package Size: mm2:W x L (PKG)
UAF42
12   
36   
-25 to 85   
14PDIP
16SOIC   
PDIP
SOIC   
See datasheet (PDIP)   

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