The 428 Series are 8-pole digitally programmable low-pass and high-pass active filters. These new filters take advantage of the company’s proprietary designs using surface-mount technology to provide a low profile, compact package in minimal board space. 428 filters are factory tuned to one of ten preset 4-bit binary ranges from 10 Hz to 102.4 kHz. Contact the factory for custom discrete tuning ranges, maximum span 1000:1. All 428 Series models are easy to use fully finished filters which require no external components or adjustment. They feature low harmonic distortion, near theoretical phase and amplitude characteristics and operate over a dynamic input voltage range from non-critical ±12V to ±18V power supplies.
The document describes the Frequency Devices 428 Series, which are 8-pole digitally programmable low-pass and high-pass active filters. These devices utilize proprietary surface-mount technology to provide a compact package with no external components required for operation.
Key features include factory tuning to one of ten preset 4-bit binary ranges spanning from 10 Hz to 102.4 kHz, low harmonic distortion, and the ability to operate over a dynamic input voltage range from +12V to +18V.
| Frequency Range | 10 Hz - 102.4 kHz |
|---|---|
| Filter Type | 8-pole digitally programmable low-pass and high-pass active filters |
| Package Size | 0.8"L x 0.3"H min. |
| Supply Voltage Range | +12V to +18V |
No, all models are fully finished filters which require no external components or adjustment.
The maximum span for custom discrete tuning ranges is 1000:1.