D61 Series
0.02 Hz to 1.00 Hz
Fixed Frequency
Description
The D61 Series of small 4-pole fixed-frequency,
precision active filters provide high performance
linear active filtering in a compact 32-pin DIP
package, with a broad range of corner
frequencies and a choice of transfer functions.
Individual D61 filters can serve in low-pass or high-
pass applications or be combined to create custom
band-pass or band reject filters. These fully self-
contained units require no external components or
adjustments. Each model comes factory tuned to a
user-specified corner frequency between 0.02 Hz
and 1.00 Hz and operate with low total harmonic
distortion over a wide dynamic input voltage range
from non-critical +/-5V to +/-18V power supplies.
32-Pin DIP
4 - Pole Filters
Features/Benefits:
• Low harmonic distortion and wide signal-to-noise
ratio
• Compact 1.8"L x 0.8"W x 0.5"H minimizes board
space requirements.
• Plug-in ready-to-use, reducing engineering design
and manufacturing cycle time.
• Factory tuned, no external clocks or adjustments
needed
• Broad range of transfer characteristics and corner
frequencies to meet a wide range of applications.
Available Low-Pass Models:
. . . . . . . . . . .Page
D61L4B
D61L4L
4-pole Butterworth . . . . . . . . . . . . . . . .2
4-pole Bessel . . . . . . . . . . . . . . . . . . . .2
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
• Acoustic and vibration analysis and control
• Noise elimination
• Signal reconstruction
Available High-Pass Models:
. . . . . . . . . . . . . . .
D61H4B
4-pole Butterworth . . . . . . . . . . . . . . . .2
General Specifications:
Pin-out/package data & ordering information . . . .3
1784 Chessie Lane, Ottawa, IL 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176
e-mail: sales@freqdev.com • Web Address: http://www.freqdev.com
FREQUENCYDEVICES [ FREQUENCY DEVICES, INC. ]
