D70 Series

8-, 6-, 4-Pole

Low-Pass Filters

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

Fixed Frequency

3

1. Phase Match and Amplitude Accuracy are within ±2% max., ±1% typ. of the theoretical transfer characteristics.

Model

D70L8L

D70L6L

D70L4L

Product Specifications

Transfer Function

8-Pole, Bessel

6-Pole, Bessel

4-Pole, Bessel

Size

0.84” x 0.65” x 0.31”

0.84” x 0.65” x 0.31”

0.65” x 0.51” x 0.31”

100 Hz to 50 kHz

100 Hz to 50 kHz

100 Hz to 50 kHz

Theoretical Transfer

Appendix A

Appendix A

Appendix A

Characteristics

Page 4

Page 3

Page 2

Passband Ripple

0.0 dB

0.0 dB

0.0 dB

(theoretical)

DC Voltage Gain

0 ± 0.02 dB typ.

0 ± 0.02 dB typ.

0 ± 0.02 dB typ.

(non-inverting)

Stopband

Attenuation Rate

48 dB/octave

36 dB/octave

24 dB/octave

Cutoff Frequency

± 2% max.

± 2% max.

± 2% max.

Stability

± 0.02% /°C

± 0.02% /°C

± 0.02% /°C

Amplitude

-3 dB

-3 dB

-3 dB

Phase

-182°

-155°

-121°

Filter Attenuation

1.91 dB

1.89 dB

1.86 dB

(theoretical)

3.01 dB

3.01 dB

3.01 dB

60.0 dB

60.0 dB

60.0 dB

80.0 dB

80.0 dB

80.0 dB

(theoretical)

Total Harmonic

Distortion @ 1 kHz

< -90 dB

< -90 dB

< -90 dB

Wide Band Noise

200

mVrms typ.

200

mVrms typ.

200

mVrms typ.

Narrow Band Noise

50

mVrms typ.

50

mVrms typ.

50

mVrms typ.

Filter Mounting

Assembly

FMA-01A

FMA-01A

FMA-01A