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Fixed Frequency
D74 & DP74 Series
4-Pole
Low-Pass and High-Pass Filters
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
2
Model
D74L4B & DP74L4B
D74L4L & DP74L4L
Model
D74H4B
Product Specifications
Low-Pass
High-Pass
Transfer Function
4-Pole, Butterworth
4-Pole, Bessel
Transfer Function
4-Pole, Butterworth
Size
0.88” x 0.46” x 0.375”
Size
0.88” x 0.46” x 0.375”
Range fc
D74
1 Hz to 100 kHz
Range fc
1 Hz to 100 kHz
DP74
1 Hz to 5 kHz
Theoretical Transfer
Theoretical Transfer
Characteristics
Characteristics
Passband Ripple
0.0 dB
Passband Ripple
0.0 dB
(theoretical)
DC Voltage Gain
0 ± 0.1 dB typ.
Voltage Gain
0 ± 0.1 dB to 100 kHz
(non-inverting)
Stopband
Attenuation Rate
24 dB/octave
Attenuation Rate
24 dB/octave
Power Bandwidth
120 kHz
Small Signal Bandwidth
(-6 dB) 1 MHz
Cutoff Frequency
fc
± 2% max.
fc
± 2% max.
Cutoff Frequency
fc
± 2% max.
Stability
± 0.03% /°C
Stability
± 0.03% /°C
Amplitude
-3 dB
Amplitude
-3 dB
Phase
-180°
-121°
Phase
-180°
Filter Attenuation
0.67 dB
0.80 fc
1.86 dB
0.80 fc
Filter Attenuation
80 dB
0.10 fc
(theoretical)
3.01 dB
1.00 fc
3.01 dB
1.00 fc
(theoretical)
60 dB
0.18 fc
60.0 dB
5.62 fc
60.0 dB
8.48 fc
3.01 dB
1.00 fc
80.0 dB
10.0 fc
80.0 dB
15.12 fc
0.00 dB
4.00 fc
Total Harmonic
Distortion @ 1 kHz
D74
<-70 dB
D74
<-70 dB
DP74
<-70 dB
DP74
<-70 dB
Wide Band Noise
200
Vrms typ.
200
Vrms typ.
Wide Band Noise
400
Vrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise
50
Vrms typ.
50
Vrms typ.
Narrow Band Noise
100
Vrms typ.
(20 Hz - 100 kHz)
Filter Mounting
Assembly
FMA-01A
Assembly
FMA-01A