25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839
e-mail: sales@freqdev.com • Web Address: http://www.freqdev.com
1.0 Hz to 102.4 kHz
8-Bit Programmable
828 Series
2" x 2"
8-Pole Filters
Description
The 828 Series are digitally programmable low-pass
and high-pass active filters that are tunable over a
256:1 frequency range. 828 filters are available with
any one of five standard factory-set tuning ranges or
8-bit custom ranges from 1.0 Hz to 102.4 kHz.
These units contain 8 CMOS logic inputs.
All 828 Series models are convenient, low profile,
easy to use fully finished filters which require no
external components or adjustments. They feature
low harmonic distortion, and near theoretical phase
and amplitude characteristics.
828 filters operate
from non-critical ± 12 to ± 18 Vdc power supplies,
have a 10 k
Ω (min.) input and a 10 Ω (max.) output
impedance.
Features/Benefits:
•
Compact 2" x 2" design minimizes board space
requirements.
•
Low harmonic distortion and wide signal-to-noise
ratio to 16 bit resolution.
•
Digitally programmable corner frequency allows
selecting cut-off frequencies specific to each
application.
•
Plug-in
ready-to-use,
reducing
engineering
design and manufacturing cycle time.
• Factory-set tuning range, no external clocks or
adjustments needed
• Broad range of transfer characteristics and corner
frequencies to meet a wide range of applications.
Applications
• Anti-alias filtering
• Data acquisition systems
• Communication systems and electronics
• Medical electronics equipment and research
• Aerospace, navigation and sonar applications
•
Sound and vibration testing
• Real and compressed time data analysis
• Noise elimination
• Signal reconstruction
Programmable Specifications:. . . . . . . . . . . . . Page
Digital Tuning & Control . . . . . . . . . . . . . . . . . . . . . 2
Available Low-Pass Models: . . . . . . . . . . . . . . . . . .
828L8B
8-pole Butterworth . . . . . . . . . . . . . . . . . 3
828L8E
8-pole, 6 zero elliptic, 1.77 (-80dB) . . . . 3
828L8EX 8-pole, 6 zero elliptic, 1.56 (-80dB) . . . . 3
828L8EY 8-pole, 6 zero elliptic, 2.00 (-100dB) . . . 3
828L8L
8-pole Bessel. . . . . . . . . . . . . . . . . . . . . 4
828L8D60 8-pole constant delay (-60dB) . . . . . . . . 4
828L8D80 8-pole constant delay (-80dB) . . . . . . . . 4
828L8D10 8-pole constant delay (-100dB) . . . . . . . . 4
Available High-Pass Models: . . . . . . . . . . . . . . . . . .
828H8B
8-pole Butterworth . . . . . . . . . . . . . . . . . 5
828H8E
8-pole, 6 zero elliptic, 1.77 (-80dB) . . . . . 5
828H8EX 8-pole, 6 zero elliptic, 1.56 (-80dB) . . . . . 5
828H8EY 8-pole, 6 zero elliptic, 2.00 (-100dB) . . . . 5
General Specifications:
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin-out/package data . . . . . . . . . . . . . . . . . . . . . . . . 6
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