D94 Series

1 Hz to 400 kHz*

Low Noise Fixed Frequency

4 - Pole Single Power Supply

Anti-Aliasing Low-Pass Filters

2

1784 Chessie Lane, Ottawa, Illinois 61350

• Tel:800/252-7074, 815/434-7800 • FAX:815/434-8176

e-mail: sales@freqdev.com

• Web Address: http://www.freqdev.com

D94L4B

D94L4L

Transfer Function

4-Pole Butterworth

4-Pole Bessel

Size

1.5” x 2.0” x 0.4”

1.5” x 2.0” x 0.4”

1.0 Hz to 400 kHz

1.0 Hz to 200 kHz

Theoretical Transfer

Characteristics

Appendix A

Page 7

Appendix A

Page 2

Passband Ripple

0.0 dB

0.0 dB

DC Voltage Gain

(non-inverting)

0

± 0.1 dB max.

0

± 0.05 dB typ.

0

± 0.1 dB max.

0

± 0.05 dB typ.

Stopband

Attenuation Rate

24 dB/octave

21 dB/octave

Cutoff Frequency

± 1% max.

± 1% max.

Stability

± 0.01%/°C

± 0.01%/°C

Amplitude

-3 dB

-3 dB

Phase

-180

°

-121

°

Filter Attenuation

(theoretical)

0.67 dB

1.86 dB

3.01 dB

3.01 dB

30.0 dB

30.0 dB

40.0 dB

40.0 dB

Amplitude Accuracy

(theoretical)

±0.2 dB max.

±0.2 dB max.

±0.1 dB typ.

±0.1 dB typ.

±0.3 dB max.

±0.3 dB max.

±0.15 dB typ.

±0.15 dB typ.

(THD) Total Harmonic

Distortion @ 1 kHz

<-100 dB

<-100 dB

Wide Band Noise

(5 Hz – 2 MHz)

< 200 µVrms

< 200 µVrms

SINAD

<-100 dB

<-100 dB