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
Bessel
8-Pole, 6 zero
Constant Delay
8-Pole, 6 zero
Constant Delay
8-Pole, 6 zero
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 f
c
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
Characteristics
Appendix A
Page 4
Appendix A
Page 20
Appendix A
Page 21
Appendix A
Page 22
Passband Ripple
(theoretical)
0.0 dB
0.15 dB
0.15 dB
0.15 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.
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
Stopband
Attenuation Rate
48 dB/octave
60 dB min.
80 dB min.
100 dB min.
Cutoff Frequency
Stability
Amplitude
Phase
f
c
± 2% max.
± 0.01% /°c
-3 dB
-182°
f
c
± 2% max.
± 0.01% /°c
-3 dB
-306°
f
c
± 2% max.
± 0.01% /°c
-3 dB
-306°
f
c
± 2% max.
± 0.01% /°c
-3 dB
-311°
Filter Attenuation
(theoretical)
1.91 dB 0.80 f
c
3.01 dB 1.00 f
c
60.0 dB 4.52 f
c
80.0 dB 6.07 f
c
3.01 dB 1.00 f
c
40.0 dB 2.28 f
c
60.0 dB 2.64 f
c
3.01 dB 1.00 f
c
60.0 dB 3.08 f
c
80.0 dB 3.57 f
c
3.01 dB 1.00 f
c
80.0 dB 4.45 f
c
100.0 dB 5.20 f
c
Phase Match
1
0 - f
c
± 2° max.
± 1° typ.
0 - f
c
± 2° max.
± 1° typ.
0 - f
c
± 2° max.
± 1° typ.
0 - f
c
± 2° max.
± 1° typ.
Amplitude Accuracy
(theoretical)
0 - f
c
± 0.2 dB max.
± 0.1 dB typ.
0 - 0.8 f
c
± 0.2 dB max.
± 0.1 dB typ.
0 - 0.8 f
c
± 0.2 dB max.
± 0.1 dB typ.
0 - 0.8 f
c
± 0.2 dB max.
± 0.1 dB typ.
0.8 f
c
- 1.0 f
c
± 0.3 dB max.
± 0.15 dB typ.
0.8 f
c
- 1.0 f
c
± 0.3 dB max.
± 0.15 dB typ.
0.8 f
c
- 1.0 f
c
± 0.3 dB max.
± 0.15 dB typ.
Total Harmonic
Distortion @ 1kHz
< - 100 dB typ.
< - 100 dB typ.
< - 100 dB typ.
< - 100 dB typ.
Wide Band Noise
(5 Hz - 2 MHz)
200
μ
Vrms typ.
200
μ
Vrms typ.
200
μ
Vrms typ.
200
μ
Vrms typ.
Narrow Band Noise
(5 Hz - 100 kHz)
50
μ
Vrms typ.
50
μ
Vrms typ.
50
μ
Vrms typ.
50
μ
Vrms typ.
Filter Mounting
Assembly
FMA-02A
FMA-02A
FMA-02A
FMA-02A
8-Bit Programmable