818 Series
8-Pole
Low-Pass Filters
8-Bit Programmable
Model
818L8B
818L8L
818L8E
818L8D80
Product Specifications
Transfer Function
8-Pole,
Butterworth
8-Pole,
Bessel
8-Pole, 6 zero,
Elliptic
8-Pole, 6 zero,
Constant Delay
Size
2.0” x 4.0” x 0.4”
1 kHz to 128 MHz
2.0” x 4.0” x 0.4”
1 kHz to 1.28 MHz
2.0” x 4.0” x 0.4”
1 kHz to 1.28 MHz
2.0” x 4.0” x 0.4”
1 kHz to 1.28 MHz
Range fc
Theoretical Transfer
Characteristics
Appendix A
Page 9
Appendix A
Page 4
Appendix A
Page 24
Appendix A
Page 21
Passband Ripple
(theoretical)
0.0 dB
0.0 dB
0.035 dB
0.15 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
48 dB/octave
80 dB min.
80 dB min.
3% max. fc
Cutoff Frequency
Stability
Amplitude
Phase
fc
3% max.
fc
3% max.
fr
3% max.
0.01% /°C
- 3 dB
-360°
0.01% /°C
- 3 dB
-182°
0.01% /°C
- 0.035 dB
- 323.5°
0.01% /°C
- 3 dB
-306°
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
1.91 dB
3.01 dB
60.0 dB
80.0 dB
0.80 fc
1.00 fc
4.52 fc
6.07 fc
0.035 dB
3.01 dB
60.0 dB
80.0 dB
1.00 fr 3.01 dB
1.13 fr 60.0 dB
1.67 fr 80.0 dB
1.77 fr
1.00 fc
3.08 fc
3.57 fc
1
Phase Match
See page 5 & 6
0 - 0.6 fc
See page 5 & 6
See page 5 & 6
See page 5 & 6
Amplitude Accuracy
0.5 dB max. 0 - fc
0.25 dB typ.
0.8 dB max. 0 - 0.8 fr
0.4 dB typ.
0.5 dB max. 0 - 0.8 fc
0.25 dB typ.
0.5 dB max.
0.25 dB typ.
(theoretical)
0.6 fc - 1.0 fc 1.0 dB max.
0.6 dB typ.
0.8 fc - 1.0 fr 1.0 dB max. 0.8 fc - 1.0 fc 1.0 dB max.
0.5 dB typ.
0.5 dB typ.
Total Harmonic
< - 88 dB typ.
300 µVrms typ.
75 µVrms typ.
< - 88 dB typ.
300 µVrms typ.
75 µVrms typ.
< - 88 dB typ.
350 µVrms typ.
75 µVrms typ.
< - 88 dB typ.
300 µVrms typ.
75 µVrms typ.
Distortion @ 1 kHz
Wide Band Noise
(5 Hz - 2 MHz)
Narrow Band Noise
(5 Hz - 100 kHz)
Filter Mounting
Assembly
FMA-04A
FMA-04A
FMA-04A
FMA-04A
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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