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.
| Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | Data sheet | Universal Active Filter datasheet (Rev. B) | 24 Okt 2010 | |
| Application note | Build a 3-Phase Sine Wave Generator with the UAF42 | 04 Okt 2000 | ||
| Application note | Design a 60Hz Notch Filter with the UAF42 | 04 Okt 2000 | ||
| Application note | Digitally Programmable, Time-Continuous Active Filter | 27 Sep 2000 | ||
| Application note | Filter Design Program For The UAF42 Universal Active Filter | 27 Sep 2000 | ||
| Application note | Simple Filter Turns Square Waves into Sine Waves | 27 Sep 2000 |
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| Gehäuse | Pins | Herunterladen |
|---|---|---|
| PDIP (N) | 14 | Optionen anzeigen |
| SOIC (DW) | 16 | Optionen anzeigen |
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