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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
828 Series
8-Pole
Low-Pass Filters
4
1.Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
Model
828L8L
828L8D60
828L8D80
828L8D10
Product Specifications
Transfer Function
8-Pole
8-Pole, 6 zero
8-Pole, 6 zero
8-Pole, 6 zero
Bessel
Constant Delay
Constant Delay
Constant Delay
Size
2.0” x 2.0” x 0.5”
2.0” x 2.0” x 0.5”
2.0” x 2.0” x 0.5”
2.0” x 2.0” x 0.5”
Range fc
1.0 Hz to 102.4 kHz
1.0 Hz to 102.4 kHz
1.0 Hz to 102.4 kHz
1.0 Hz to 102.4 kHz
Theoretical Transfer
Appendix A
Appendix A
Appendix A
Appendix A
Characteristics
Page 4
Page 20
Page 21
Page 22
Passband Ripple
0.0 dB
0.15 dB
0.15 dB
0.15 dB
(theoretical)
DC Voltage Gain
0 ± 0.1 dB max.
0 ± 0.1 dB max.
0 ± 0.1 dB max.
0 ± 0.1 dB max.
(non-inverting)
0 ± 0.05 dB typ.
0 ± 0.05 dB typ.
0 ± 0.05 dB typ.
0 ± 0.05 dB typ.
Stopband
Attenuation Rate
48 dB/octave
60 dB min.
80 dB min.
100 dB min.
Cutoff Frequency
fc
± 2% max.
fc
± 2% max.
fc
± 2% max.
fc
± 2% max.
Stability
± 0.01% /°c
± 0.01% /°c
± 0.01% /°c
± 0.01% /°c
Amplitude
-3 dB
-3 dB
-3 dB
-3 dB
Phase
-182°
-306°
-306°
-311°
Filter Attenuation
1.91 dB
0.80 fc
3.01 dB
1.00 fc
3.01 dB
1.00 fc
3.01 dB
1.00 fc
(theoretical)
3.01 dB
1.00 fc
40.0 dB
2.28 fc
60.0 dB
3.08 fc
80.0 dB
4.45 fc
60.0 dB
4.52 fc
60.0 dB
2.64 fc
80.0 dB
3.57 fc
100.0 dB
5.20 fc
80.0 dB
6.07 fc
Phase Match1
0 - fc
± 2° max.
0 - fc
± 2° max.
0 - fc
± 2° max.
0 - fc
± 2° max.
± 1° typ.
± 1° typ.
± 1° typ.
± 1° typ.
Amplitude Accuracy
0 - fc
± 0.2 dB max.
0 - 0.8 fc
± 0.2 dB max.
0 - 0.8 fc
± 0.2 dB max.
0 - 0.8 fc
± 0.2 dB max.
(theoretical)
± 0.1 dB typ.
± 0.1 dB typ.
± 0.1 dB typ.
± 0.1 dB typ.
0.8 fc - 1.0 fc ± 0.3 dB max.
0.8 fc - 1.0 fc ± 0.3 dB max.
0.8 fc - 1.0 fc ± 0.3 dB max.
± 0.15 dB typ.
± 0.15 dB typ.
± 0.15 dB typ.
Total Harmonic
< - 100 dB typ.
< - 100 dB typ.
< - 100 dB typ.
< - 100 dB typ.
Distortion @ 1kHz
Wide Band Noise
200
µVrms typ.
200
µVrms typ.
200
µVrms typ.
200
µVrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise
50
µVrms typ.
50
µVrms typ.
50
µVrms typ.
50
µVrms typ.
(5 Hz - 100 kHz)
Filter Mounting
Assembly
FMA-02A
FMA-02A
FMA-02A
FMA-02A
8-Bit Programmable