The UAF42 is a monolithic active filter from TI that can be configured for a wide range of low-pass, high-pass, and band-pass filters. It features a classic state-variable analog architecture with an inverting amplifier and two integrators. The integrators include on-chip 1000pF capacitors trimmed to 0.5%.
The UAF42 is a universal active filter IC that can be configured as low‑pass, high‑pass, band‑pass, or band‑reject filters. It uses a classic state‑variable analog architecture with on‑chip 1000 pF capacitors trimmed to 0.5 % and is offered in 14‑pin PDIP and 16‑pin SOIC packages for a temperature range of –25 °C to +85 °C.
The datasheet lists detailed electrical characteristics such as frequency range, slew rate, input offset voltage, and bias current, as well as pin‑out diagrams, ordering information, and a DOS‑compatible design program that assists engineers in calculating component values for Butterworth, Chebyshev, Bessel, and inverse Chebyshev filter types.
| Frequency Range | 0 to 100 kHz |
|---|---|
| Frequency Accuracy | 1 % at 1 kHz |
| Maximum Q | 400 |
| Input Offset Voltage | +0.5 to +5 mV |
| Input Bias Current | 10 to 50 pA |
| Noise Density (10 Hz) | 25 nV/√Hz |
| Slew Rate | 10 V/µs |
| Operating Voltage | +15 V (range +6 V to +18 V) |
| Operating Temperature Range | –25 °C to +85 °C |
| Package Types | PDIP‑14, SOIC‑16 |
It can be configured as low‑pass, high‑pass, band‑pass, or band‑reject filters.
The specified operating temperature range is –25 °C to +85 °C.
The device is specified to operate at +15 V, with an allowable range from +6 V to +18 V.
The UAF42 is available in 14‑pin PDIP and 16‑pin SOIC surface‑mount packages.