UAF42AU

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UAF42AU

Universal Active Filter

Packaging

Package | PIN: DW | 16
Temp: S (-25 to 85)
Carrier: Partial Tube
Qty Price
1-9 $16.90
10-24 $15.71
25-99 $15.17
100-249 $13.25
250-499 $12.61
500-749 $11.60
750-999 $10.42
1000+ $10.38

Features

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

Texas Instruments  UAF42AU

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.