AAF-1 low pass anti alias filter board

AAF-2

PCI Bus compatible 2 to 8 Channel Anti-Alias Low-Pass Filter Card for Signal Conditioning in Data Acquisition Systems

Features

Compatible with A/D converter boards from top manufacturers
2, 4, 6, or 8 differential-input anti-alias low-pass filter channels per card
Compatible to 3.3V or 5V PCI bus
Variable cutoff frequency ranges between 0.1 Hz and 200kHz
Expandable in 2 channel pairs
Differential or Single ended operation
Multiple cards can be installed in a single system
Choice of 8-pole Cauer, Bessel, Butterworth, high-speed Cauer, and linear phase delay filters
Unity gain accuracy to 0.001dB @0.25Fc

Overview

The AAF-2 is a multi-channel low-pass filter board designed for use in front of A/D converters with resolution up to 16-bits. It is ideal for filtering applications in sound and vibration testing, ultrasonics, acoustics, structural analysis, industrial, test, scientific and laboratory data collection and applied mechanical applications in electronics, aerospace, field research, automotive, and process control industries. The AAF-2 protects and filters 2, 4, 6, or 8 differential analog channels. Each 2-channel pair is available with any one of 8-pole Cauer, Bessel, Butterworth, or linear phase filters.

The cutoff frequency of the AAF-2 is set by an on-board potentiometer, which sets the same cutoff frequency for all filters on the board. Optionally, the cutoff frequency can be controlled with an external clock source for tracking filter applications, very low cutoff frequencies, or other special purposes.

Connection to Your Data Acquisition System

All I/O connections from the AAF-2 are made via two high density DSUB 26-pin triple-row connectors that extend out of the rear of the computer.

Screw Terminal Card - The STA-AAF-3 is a universal screw terminal accessory board that provides one 40-pin male connector for hookup to Alligator Technologies' AAF-2 and AAF-3 low-pass filter boards for anti-aliasing and noise elimination. All signals on the STA-AAF-3 are brought out to labeled screw terminal connections. A breadboard area is included on the board for custom circuitry, including resistors and capacitors for added filtering.

Cable Accessories - A variety of custom cable accessories, including twisted-pair ribbon cables and BNC connector boxes and cables, are available for connecting the AAF-2 to any A/D board.

How to Order

AAF-2 - General-purpose low-pass filter card for PC-based and stand-alone data acquisition systems

Accessories
- STA-AAF-3 - Screw terminal accessory card
- CA2x - cables can be made compatible with any A/D boards
- AT-BNC-2/I - Input BNC connector box
- AT-BNC-2/O - Output BNC connector box

Related Pages

Simplify your system connections. Check out our list of Cable Accessories.
Need help selecting the best filter type for your application? Check out our Filter Type Selection Guide.
What is aliasing and how do filters eliminate its effects to ensure more accurate results? Find out in our Low-Pass Filter Tutorial.

PHONE 949-515-1400 FAX 949-515-4724 E-MAIL productinfo@alligatortech.com