428 Series
8-Pole
Low-Pass Filters
4-Bit Programmable
Model
428L4B
428L4E
428L4EX
428L4EY
Product Specifications
Transfer Function
8-Pole
Butterworth
8-Pole, 6 zero
Elliptic
8-Pole, 6 zero
Elliptic
8-Pole, 6 zero
Elliptic
Size
0.8” x 1.8” x 0.5”
0.8" x 1.8" x 0.5"
0.8" x 1.8" x 0.5"
0.8" x 1.8" x 0.5"
Range fc, fr
10.0 Hz to 102.4 kHz
10.0 Hz to 102.4 kHz
10.0 Hz to 102.4 kHz
10.0 Hz to 102.4 kHz
Theoretical Transfer
Characteristics
Appendix A
Page 9
Appendix A
Page 24
Appendix A
Page 23
Appendix A
Page 25
Passband Ripple
(theoretical)
0.0 dB
0.035 dB
-0.05 dB
-0.05 dB
DC Voltage Gain
(non-inverting)
0
0
0.1 dB max.
0.05 dB typ.
0
0
0.1 dB max.
0.05 dB typ.
0
0
0.1 dB max.
0.05 dB typ.
0
0
0.1 dB max.
0.05 dB typ.
Stopband
Attenuation Rate
48 dB/octave
80 dB min.
80 dB min.
100 dB min.
Cutoff Frequency
Stability
Amplitude
Phase
fc
2% max.
fr
2% max.
fr
2% max.
fr
2% max.
0.01% /°c
-3 dB
-360°
0.01% /°c
-0.035 dB
-323.5°
0.01% /°c
-0.05 dB
-414°
0.01% /°c
-0.05 dB
-419°
Filter Attenuation
(theoretical)
0.12 dB
3.01 dB
60.0 dB
80.0 dB
0.80 fc
1.00 fc
2.37 fc
3.16 fc
0.035 dB
3.01 dB
60.0 dB
80.0 dB
1.00 fr
1.13 fr
1.67 fr
1.77 fr
0.05 dB
3.01 dB
60.0 dB
80.0 dB
1.00 fr 0.05 dB
1.00 fr
1.06 fr
1.83 fr
2.00 fr
1.05 fr 3.01 dB
1.45 fr 80.0 dB
1.56 fr 100.0 dB
1
Phase Match
0 - 0.8 fc
2° max.
1° typ.
0 - 0.8 fr
2° max.
1° typ.
4° max.
2° typ.
0 - 0.8 fr
3° max.
0 - 0.8 fr
3° max.
1.5° typ.
4° max.
2° typ.
1.5° typ.
4° max.
2° typ.
0.8 fc - 1.0 fc 3° max.
1.5° typ.
0.8 fr - 1.0 fr
0.8 fr - 1.0 fr
0.8 fr - 1.0 fr
Amplitude Accuracy
(theoretical)
0 - 0.8 fc
0.2 dB max. 0 - 0.8 fr
.2 dB max. 0 - 0.8 fr
.1 dB typ.
.3 dB max. 0.8 fr - 1.0 fr
.15 dB typ.
0.2 dB max. 0 - 0.8 fr
0.1 dB typ.
0.5 dB max. 0.8 fr - 1.0 fr
0.25 dB typ.
0.2 dB max.
0.1 dB typ.
0.5 dB max.
0.25 dB typ.
0.1 dB typ.
0.8 fc - 1.0 fc 0.3 dB max. 0.8 fr - 1.0 fr
0.15 dB typ.
Total Harmonic
< - 100 dB typ.
200 mVrms typ.
50 mVrms typ.
< - 88 dB typ.
200 mVrms typ.
50 mVrms typ.
< - 88 dB typ.
250 mVrms typ.
75 mVrms typ.
< - 88 dB typ.
250 mVrms typ.
75 mVrms typ.
Distortion @ 1 kHz
Wide Band Noise
(5 Hz - 2 MHz)
Narrow Band Noise
(5 Hz - 100 kHz)
Filter Mounting
Assembly
FMA-02A
FMA-02A
FMA-02A
FMA-02A
1. Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
3
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