100 Hz to 50 kHz Fixed Frequency
DIP Filters
8-, 6-, 4-Pole Filters
Description
The D70 Series of small, fixed-frequency, linear active DIP filters provide high performance linear,multi-pole filtering in a compact package, with a broad range of pole configurations. These Butterworth and Bessel low-pass and Butterworth high-pass filters combine the excellent performance of linear multi-pole filter design with the space sav-ing of the dual in-line package (DIP). Each model comes factory tuned to a user-specified corner fre-quency between 100Hz and 50kHz. These fully self-contained units require no external compo-nents or adjustments. They operate with dynamic input voltage range from non-critical ±5V to ±18V power supplies.Features/Benefits:
?Compact DIP design minimizes board space requirements
?Plug-in ready-to-use, reducing engineering design and manufacturing time
?Factory tuned, no external clocks or adjustments needed
?Low harmonic distortion and wide signal-to-noise ratio to 14 bit resolution
?Broad range of pole configurations and corner fre-quencies to meet a wide range of applications Applications
? Anti-alias filtering
? Data acquisition systems
? Communication systems and electronics ? Medical electronics equipment and research ? Aerospace, navigation and sonar applications ? Sound and vibration testing
? Real and compressed time data analysis ? Noise elimination ? Signal reconstruction
Available Low-Pass Models: . . . . . . . . . . .Page D70L8B 8-pole Butterworth . . . . . . . . . . . . . . .2D70L6B 6-pole Butterworth . . . . . . . . . . . . . . .2D70L4B 4-pole Butterworth . . . . . . . . . . . . . . .2D70L8L 8-pole Bessel . . . . . . . . . . . . . . . . . . .3D70L6L 6-pole Bessel . . . . . . . . . . . . . . . . . . .3D70L4L
4-pole Bessel . . . . . . . . . . . . . . . . . . .3
Available High-Pass Models:D70H8B 8-pole Butterworth . . . . . . . . . . . . . . .4D70H6B 6-pole Butterworth . . . . . . . . . . . . . . .4D70H4B
4-pole Butterworth . . . . . . . . . . . . . . .4
General Specifications:
Pin-out/package data & ordering information . . . .5
Fixed Frequency
8-, 6-, 4-Pole Low-Pass Filters
1.Phase Match and Amplitude Accuracy are within ±2% max., ±1% typ. of the theoretical transfer characteristics.
Model
D70L8B
D70L6B
D70L4B
Product Specifications Transfer Function 8-Pole, Butterworth 6-Pole, Butterworth 4-Pole, Butterworth,Size 0.84” x 0.65” x 0.31”0.84” x 0.65” x 0.31”0.65” x 0.51” x 0.31”Range f c
100 Hz to 50 kHz 100 Hz to 50 kHz 100 Hz to 50 kHz Theoretical Transfer Appendix A Appendix A Appendix A Characteristics Page 9Page 8Page 7Passband Ripple
0.0 dB 0.0 dB 0.0 dB (theoretical)
DC Voltage Gain
0 ±0.02 dB typ.
0 ±0.02 dB typ.
0 ±0.02 dB typ.
(non-inverting)
Stopband
Attenuation Rate 48 dB/octave
36 dB/octave
24 dB/octave
Cutoff Frequency f c ±2% max.f c ±2% max.f c ±2% max.Stability ±0.02% /°C ±0.02% /°C ±0.02% /°C Amplitude -3 dB -3 dB -3 dB Phase -360°
-270°
-180°
Filter Attenuation
0.12 dB 0.80 f c 0.29 dB 0.80 f c 0.67 dB 0.80 f c (theoretical)
3.01 dB 1.00 f c 3.01 dB 1.00 f c 3.01 dB 1.00 f c 60.0 dB 2.37 f c 60.0 dB 3.16 f c 60.0 dB 5.62 f c 80.0 dB 3.16 f c
80.0 dB 4.64 f c
80.0 dB 10.0 f c
Phase Match 1
Amplitude Accuracy 1
(theoretical)
Total Harmonic Distortion @ 1 kHz < -90 dB < -90 dB < -90 dB Wide Band Noise
200 m Vrms typ.200 m Vrms typ.200 m Vrms typ.(20 Hz - 4 MHz)
Narrow Band Noise
50 m Vrms typ.
50 m Vrms typ.
50 m Vrms typ.
(5 Hz - 50 kHz)
Filter Mounting Assembly
FMA-01A FMA-01A FMA-01A
8-, 6-, 4-Pole
Fixed Frequency
D70 Series
8-, 6-, 4-Pole High-Pass Filters
1.Phase Match and Amplitude Accuracy are within ±2% max., ±1% typ. of the theoretical transfer characteristics.
Model
D70H8B
D70H6B
D70H4B
Product Specifications Transfer Function 8-Pole, Butterworth 6-Pole, Butterworth 4-Pole, Butterworth Size 0.84” x 0.65” x 0.31”0.84” x 0.65” x 0.31”0.65” x 0.51” x 0.31”Range f c
100 Hz to 50 kHz 100 Hz to 50 kHz 100 Hz to 50 kHz Theoretical Transfer Appendix A Appendix A Appendix A Characteristics Page 29Page 28Page 27Passband Ripple
0.0 dB 0.0 dB 0.0 dB (theoretical)
Voltage Gain
0 ±0.02 dB typ.0 ±0.02 dB typ.0 ±0.02 dB typ.(non-inverting)
Power Bandwidth 120 kHz 120 kHz 120 kHz Small Signal Bandwidth (-6dB) 1 MHz (-6dB) 1 MHz (-6dB) 1 MHz Stopband
Attenuation Rate 48 dB/octave
36 dB/octave
24 dB/octave
Cutoff Frequency f c ±2% max.f c ±2% max.f c ±2% max.Stability ±0.02% /°C ±0.02% /°C ±0.02% /°C Amplitude -3 dB -3 dB -3 dB Phase -360°
-270°
-180°
Filter Attenuation
80 dB 0.31 f c 80 dB 0.21 f c 80 dB 0.10 f c (theoretical)
60 dB 0.42 f c 60 dB 0.32 f c 60 dB 0.18 f c 3.01 dB 1.00 f c 3.01 dB 1.00 f c 3.01 dB 1.00 f c 00.0 dB 2.00 f c
00.0 dB 2.50 f c
00.0 dB 4.0 f c
Phase Match 1
Amplitude Accuracy 1
(theoretical)
Total Harmonic Distortion @ 1 kHz < -80 dB < -80 dB < -80 dB Wide Band Noise
400 m Vrms typ.400 m Vrms typ.400 m Vrms typ.(20 Hz - 4 MHz)
Narrow Band Noise
100 m Vrms typ.
100 m Vrms typ.
100 m Vrms typ.
(20 Hz - 100 kHz)
Filter Mounting Assembly
FMA-01A FMA-01A FMA-01A
Specification
(25°C and Vs ±15 Vdc)
D70 Series
Pin-Out and Package Data
Ordering Information
Analog Input Characteristics 1Impedance 10 k W min.Voltage Range ±10 Vpeak Max. Safe Voltage ±Vs Analog Output Characteristics Impedance 1 W Linear Operating Range ±10 V
Maximum Current 2
±10 mA
Offset Voltage 3
±10 mV Offset Temp. Coeff.50 m V /°C Power Supply (±Vs)Rated Voltage ±15 Vdc
Operating Range
±5 to ±18 Vdc Maximum Safe Voltage ±18 Vdc Quiescent Current (max.)
8 Pole ±18 mA 6 Pole ±15 mA 4 Pole ±10 mA Temperature Operating 0 to + 70°C Storage
- 25 to + 85°C
Notes:
1.Input and output signal voltage referenced to supply common.
2.Output is short circuit protected to common.DO NOT CONNECT TO ±VS.
3.Adjustable to zero.
4.
How to specify Corner Frequencies:
Corner frequencies are specified by attaching a three digit frequency designa-tor to the basic model number. Corner frequencies can range from 100 Hz to 50.0 kHz.
Filter Type
L - Low Pass H - High Pass
D70L8B-849 Hz
Transfer Function B - Butterworth L - Bessel
Ordering Information
No. of Poles
864
-3 dB Corner Frequency 4
e.g.,849 Hz
2.50 kHz 3
3.3 kHz
Recommend PC board hole 0.025”
Filter Mounting Assembly-See FMA-01A
Appendix A
Bessel
Normalized Frequency(f/fc)
A m p (d
B )
Normalized Time (1/f sec)
D e l a y (s e c )
Normalized Time (1/f sec)
S t e p R e s p o n s e (V /V )
Frequency Response Delay (Normalized)Step Response 0.1
1.010.0
2
345678
234567-100
-80-60-40-2000.1
1.0
1.5
0.15012345
-0.0-0.2
0.20.40.60.81.01.2(sec)Theoretical Transfer Characteristics
1
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.85 0.90 0.95 1.00 1.10 1.20 1.30 1.40 1.50 1.60 1.70 1.801.90 2.00 2.25 2.50 2.75 3.00 3.25 3.50 4.00 5.006.00 7.00 8.00 9.00 10.01.Normalized Group Delay:
The above delay data is normalized to a corner frequency of 1.0Hz.The actual delay is the normalized delay divided by the actual corner frequency (fc).
Normalized Delay
f/fc (Hz)Amp (dB)Phase (deg)Delay 0.00 -12.1 -24.2 -36.3 -48.4 -60.6-48.1 -53.4 -58.0 -62.0 -65.7
-25.1 -27.6 -30.0 -34.4 -41.9 -12.2
-13.4 -16.5 -19.5 -22.4 -6.37 -7.42 -8.54 -9.71 -10.9-2.69 -3.01 -3.71 -4.51 -5.39-1.02 -1.41 -1.86 -2.11 -2.40 0.00 -0.028 -0.111 -0.251 -0.448 -0.705 -315 -321 -326 -330 -333 -267 -275 -281 -291 -305 -212 -219 -235 -248 -259-166 -177 -187 -195 -204-115 -121 -133 -144 -156 -72.7 -84.8 -96.8 -103 -109 .021 .016 .012 .009 .008.089
.076 .065 .049 .031
.211 .194 .158 .129 .107
.295 .280 .263 .246 .228
.332 .330 .325 .318 .308
.336 .336 .335 .334 .333 .336 .336 .336 .336 .336 .336
Appendix A
Bessel
Normalized Frequency(f/fc)
A m p (d
B )
Normalized Time (1/f sec)
D e l a y (s e c )
Normalized Time (1/f sec)
S t e p R e s p o n s e (V /V )
Frequency Response Delay (Normalized)Step Response 0.1
1.010.02345678234567-100-80-60-40-200
0.1 1.023456789
1.50.15012345
-0.0-0.2
0.20.40.60.81.01.2(sec)
Theoretical Transfer Characteristics
1
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.85 0.90 0.95 1.00 1.10 1.20 1.30 1.40 1.50 1.60 1.70 1.801.90 2.00 2.25 2.50 2.75 3.00 3.25 3.50 4.00 5.006.00 7.00 8.00 9.00 10.01.Normalized Group Delay:
The above delay data is normalized to a corner frequency of 1.0Hz.The actual delay is the normalized delay divided by the actual corner frequency (fc).
Normalized Delay
f/fc (Hz)Amp (dB)Phase (deg)Delay
-65.2 -73.2 -80.1 -86.2 -91.6-30.7 -34.5 -38.1 -44.7 -55.9 -12.6 -14.2 -18.3 -22.6 -26.7 -6.23 -7.29 -8.46 -9.74 -11.1 -465 -476 -484 -490 -495-385 -398 -408 -426 -449-287 -300 -328 -351 -369 -216 -232 -246 -261 -275 .036 .026 .020 .015 .013
.156 .131 .111 .083 .052.357 .335 .279 .228 187 .422 .416 .401 .393 .376 -2.70 -3.01 -3.68 -4.44 -5.29-1.05 -1.44 -1.89 -2.15 -2.42 0.00 -0.029 -0.116 -0.261 -0.465 -0.728-147 -155 -170 -186 -201 -92.9 -108 -124 -132 -139 0.00 -15.5 -31.0 -46.5 -62.0 -77.4.430 .430 .429 .428 .426 .430 .430 .430 .430 .430.430 .430 .430 .430 .430 .430
8-Pole
Bessel
Appendix A
Low-Pass
Normalized Time (1/f sec)
S t e p R e s p o n s e (V /V )
Step Response
12345
-0.2
-0.00.20.40.60.81.01.2Normalized Time (1/f sec)
D e l a y (s e c )
Delay (Normalized)0.1
1.0
Normalized Frequency(f/fc)
A m p (d
B )
Frequency Response 0.1
1.010.0
2
345678
234567-100
-80-60-40-200(sec)Theoretical Transfer Characteristics
1
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.85 0.90 0.95 1.00 1.10 1.20 1.30 1.40 1.50 1.60 1.70 1.801.90 2.00 2.25 2.50 2.75 3.00 3.25 3.50 4.00 5.006.00 7.00 8.00 9.00 10.01.Normalized Group Delay:
The above delay data is normalized to a corner frequency of 1.0Hz.The actual delay is the normalized delay divided by the actual corner frequency (fc).Normalized Delay
f/fc (Hz)Amp (dB)Phase (deg)Delay -79.2 -89.8 -99.0 -107 -114-33.4 -38.3 -43.1 -51.8 -66.8 -12.1 -13.7 -18.1 -23.1 -28.3 -6.10 -7.08 -8.16
-9.36 -10.7 -2.71 -3.01-3.67 -4.40 -5.20 -1.06 -1.45 -1.91 -2.16 -2.42 0.00 -0.029 -0.117 -0.264 -0.470 -0.737 -610 -626 -638 -647 -655-489 -509 -526 -552 -587 -345 -362 -402 -436 -465 -255 -273 -291 -309 -327 -173 -182 -200 -219 -237 -109 -128 -146 -155 -164 0.00 -18.2 -36.4 -54.7 -72.9 -91.1.052 .038 .029 .023 .018
.241 .201 .170 .126 .077 .482 .468 .417 .352 .291 .505 .504 .502 .498 .492 .506 .506
.506 .506 .506
.506 .506 .506 .506 .506 .506 .506 .506 .506 .506 .506
Appendix A
Butterworth
(sec)Normalized Frequency(f/fc)
A m p (d
B )
D e l a y (s e c )
Normalized Time (1/f sec)
S t e p R e s p o n s e (V /V )
Theoretical Transfer Characteristics
1
Frequency Response Delay (Normalized)Step Response
0.1
1.010.0
2
345678
234567-100
-80-60-40-2000
12345
-0.0
0.20.40.60.81.01.20.1
1.0
1.5
0.15
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.85 0.90 0.95 1.00 1.10 1.20 1.30 1.40 1.50 1.60 1.70 1.801.90 2.00 2.25 2.50 2.75 3.00 3.25 3.50 4.00 5.006.00 7.00 8.00 9.00 10.0-62.3 -67.6 -72.2 -76.3-80.0-38.2 -41.0 -43.5 -48.2 -55.9 -22.3 -24.1 -28.2 -31.8 -35.1-12.0 -14.3 -16.4 -18.5 -20.5 -2.21 -3.01 -4.97 -7.24 -9.62 -0.072 -0.243 -0.674 -1.047 -1.555 0.00 0.00 0.00 -0.00 -0.003
-0.017 0.00 -15.0 -30.1 -45.5 -61.4 -78.0 -95.7 -115 -136 -147 -158 -169 -180 -200 -217 -231-242 -252 -260 -266 -272 -277 -282 -291 -299 -304 -309 -313 -317 -322 -330 -335 -339 -341 -343 -345.012 .009 .007 .005
.004
.049 .041 .035 .027 .017 .134 .119 .091 .072 .059 .289 .241 .204 .175 .152
.612 .588 .513 .427
.350.511 .558 .604 .619 .622.416 .418 .423 .433 .449 .474 1.Normalized Group Delay:
The above delay data is normalized to a corner frequency of 1.0Hz.The actual delay is the normalized delay divided by the actual corner frequency (fc).
Normalized Delay
f/fc (Hz)Amp (dB)Phase (deg)Delay Normalized Frequency(f/fc)
Appendix A
Butterworth
Normalized Frequency(f/fc)
A m p (d
B )
Normalized Time (1/f sec)
D e l a y (s e c )
Normalized Time (1/f sec)
S t e p R e s p o n s e (V /V )
Frequency Response Delay (Normalized)Step Response
0.1
1.010.0
2
345678
234567-100
-80-60-40-200
12345
-0.0
0.20.40.60.81.01.2 (sec)Theoretical Transfer Characteristics
1
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.85 0.90 0.95 1.00 1.10 1.20 1.30 1.40 1.50 1.60 1.70 1.801.90 2.00 2.25 2.50 2.75 3.00 3.25 3.50 4.00 5.006.00 7.00 8.00 9.00 10.01.Normalized Group Delay:
The above delay data is normalized to a corner frequency of 1.0Hz.The actual delay is the normalized delay divided by the actual corner frequency (fc).
Normalized Delay
f/fc (Hz)Amp (dB)Phase (deg)Delay -93.4 -101 -108 -115 -120
-57.3 -61.4 -65.3 -72.2 -83.9 -33.5 -36.1 -42.3
-47.8 -52.7-503 -508 -512 -515 -518-465 -471 -476 -484 -496 -419 -425 -439 -450 -458 .017 .012 .0097 .0076 .0062.071 .060 .052 .039 .025.193 .171 .132 .105 .086-17.6 -21.2 -24.5 -27.7 -30.6 -1.88 -3.01 -6.17 -9.96 -13.9 -0.009 -0.060 -0.289 -0.578 -1.080 0.00 0.00 0.00 0.00 0.00 -0.001 -368 -382 -393 -403 -412 -252 -270 -304 -331 -352-140 -167 -198 -215 -233 0.00 -22.2 -44.5 -67.2 -90.4 -115 .417 .345 .291 .251 .219 1.03 1.00 .845 .660 .518.731 .803 .911 .970 1.02 .615 .617 .624 .637 .656 .685
Appendix A
Butterworth
0.1
1.0
10.0
2
3456782
34567
Normalized Frequency(f/fc)
-100-80-60-40-200
A m p (d
B )
0.1
1.0234
56789Normalized Time (1/f sec)
0.01.0
2.0D e l a y (s e c )
1.5
0.150
12345
Normalized Time (1/f sec)
-0.0
0.20.40.60.81.01.2S t e p R e s p o n s e (V /V )
Frequency Response Delay (Normalized)Step Response
(sec)Theoretical Transfer Characteristics
1
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.85 0.90 0.95 1.00 1.10 1.20 1.30 1.40 1.50 1.60 1.70 1.801.90 2.00 2.25 2.50 2.75 3.00 3.25 3.50 4.00 5.006.00 7.00 8.00 9.00 10.01.Normalized Group Delay:
The above delay data is normalized to a corner frequency of 1.0Hz.The actual delay is the normalized delay divided by the actual corner frequency (fc).Normalized Delay
f/fc (Hz)Amp (dB)Phase (deg)Delay
-125 -135 -144 -153 -160-76.3 -81.9 -87.1 -96.3 -112 -44.6 -48.2 -56.3 -63.7 -70.3 -23.4 -28.2 -32.7 -36.9 -40.8 -1.58 -3.01 -7.48 -12.9 -18.2 -671 -678 -683 -687 -691-621 -629 -635 -646 -661-560 -568 -586 -600 -611-494 -511 -526 -539 -550 -0.001 -0.014 -0.121 -0.311 -0.7380.00 0.00 0.00 0.00 0.00 0.00 -333 -360 -408 -445 -472 -185 -221 -261 -283 -307 0.00 -29.4 -59.0
-89.1
-120
-152
.023 .017 .013 .010 .008
.094 .080 .069 .052 .033.253 .226 .174 .139 .113 .540 .448 .380 .328 .2871.48 1.46 1.17 .873 .672 .956 1.04 1.19 1.29 1.40 .816
.819 .828 .843 .867 .903
Appendix A
Butterworth
(sec)Normalized Frequency(f/fc)
A m p (d
B )
Theoretical Transfer Characteristics
1
Frequency Response 0.1
1.010.0
2
345678
234567-100
-80-60-40-200
0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.85 0.90 0.95 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 4.005.00 6.00 7.00 8.00 9.0010.0
0.00 0.00 0.000.00 0.000.00-0.039 -0.017 -0.003-0.001 0.00 -3.99 -3.01 -0.908 -0.285 -0.100 -17.8 -12.6 -8.43 -6.69 -5.22 -80.0-55.9 -41.8 -31.8 -24.1345 330 314 299 282 264 245 224 213
202 191 180 143 118
100
87.6 78.061.4 50.7 37.8 30.1 25.1 21.4 18.8 16.715.0 .017 .012 .009
.007 .005
.004
.152 .119 .072 .049 .027 .612 .588 .427
.289 .204.511 .558 .604 .619
.622
.418
.423 .433 .449 .474
1.Normalized Group Delay:
The above delay data is normalized to a corner frequency of 1.0Hz.The actual delay is the normalized delay divided by the actual corner frequency (fc).
Normalized Delay
f/fc (Hz)Amp (dB)Phase (deg)Delay
Appendix A
Butterworth
(sec)Normalized Frequency(f/fc)
A m p (d
B )
Theoretical Transfer Characteristics
1
Frequency Response 0.1
1.010.0
2
345678
234567-100
-80-60-40-200
0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.85 0.90 0.95 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 4.005.00 6.00 7.00 8.00 9.0010.0
0.00 0.00 0.000.00 0.000.00-0.00 -0.00 -0.00-0.00 0.00 -4.55 -3.01 -0.46 -0.08 -0.02 -26.6 -18.6 -11.9 -9.05 -6.57 -120-83.9 -62.7 -47.8 -36.1518 496 473 450 425 400 373 342 325307 288 270 209
172
147
128 11590.4 74.8 55.8 44.5 37.0 31.7 27.7 24.622.2 0.025 0.017 0.013
0.010 0.008
0.006
0.219 0.171 0.105 0.071 0.039 1.033 1.005
0.660 0.4170.2910.731 0.803 0.911 0.970
1.017
0.617
0.624 0.637 0.656 0.685
1.Normalized Group Delay:
The above delay data is normalized to a corner frequency of 1.0Hz.The actual delay is the normalized delay divided by the actual corner frequency (fc).
Normalized Delay
f/fc (Hz)Amp (dB)Phase (deg)Delay
Appendix A
Butterworth
0.1
1.010.0
2
345678
234567Normalized Frequency(f/fc)
-100-80-60-40-200
A m p (d
B )
Frequency Response (sec)Theoretical Transfer Characteristics
1
0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.85 0.90 0.95 1.00 1.20 1.40 1.60 1.80 2.00 2.50
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.0 1.Normalized Group Delay:
The above delay data is normalized to a corner frequency of 1.0Hz.The actual delay is the normalized delay divided by the actual corner frequency (fc).Normalized Delay
f/fc (Hz)Amp (dB)Phase (deg)Delay
0.00 0.00
0.000.000.000.000.000.00 0.000.00 0.00-5.15 -3.01 -0.229 -0.020-0.00259.049.0 42.1 36.8 32.7 29.4-35.5 -24.8
-15.6 -11.6 -8.06-160 -112 -83.7 -63.7 -48.2386360 275226 194 170152 12099.2 74.0 535
499 459 437413691 661 631
600
568
0.033
0.023 0.017 0.013 0.010 0.008
0.287 0.226
0.139 0.0940.0521.48
1.46 0.873 0.540
0.380
.956 1.04 1.19 1.29 1.40
0.819
0.828 0.843 0.867 0.903