D68BP & D68BR Series
Fixed Frequency
Band Pass and Band Reject 4-Pole Pair Filters
Description:
The D68BP and D68BR Series of small 4-pole-pair
fixed-frequency, precision band-pass and band-
reject (notch) active filters that provide high
performance in a compact 32-pin DIP package, with
a broad range of fixed center frequencies (fo) from 1
Hz to 100 kHz. Each filter type features a near
theoretical amplitude/phase response along with low
output voltage noise enabling these filters to achieve
a 10,000:1 or better dynamic signal range.
Pretuned to within ±2% of the fixed, user specified
center frequency, D68BP band-pass filters pass all
frequencies lying between the upper and lower -3dB
points of the amplitude response curve, while D68BR
band-reject (notch) filters sharply attenuate those
frequencies that are bound and defined by the
bottom of the notch. Available Q's for D68 BP
models are 1, 2, 5, or 10 and D68BR filters are 3 or
10.
Features/Benefits: U.S. Selling Price (1-9) $270.00 ea.
· Compact 32-pin footprint minimizes board space Orders for Export U.S. Selling Price + 20%
Minimum Order Value $150.00 F.O.B. Haverhill, MA
requirements. Lead-Time: 2-4 weeks A.R.O. Accept Visa, Mcard, Amex
· Plug-in ready-to-use, reducing engineering design
and manufacturing cycle time.
· Factory tuned, no external clocks or adjustments Available Band-Pass Models: . . . . . . . . . . . . .Page
needed D68BP4 4 pole pair . . . . . . . . . . . . . . . . . . .2
· Broad range of center frequencies to meet a wide
range of applications. Available Band-Reject Models:
D68BR4 4-pole pair . . . . . . . . . . . . . . . . . . .2
Applications
· Power line interference rejection General Specifications:
· Transducer output filtering Ordering Information . . . . . . . . . . . . . . . . . . . . . . .3
Pin-Out/Package Data . . . . . . . . . . . . . . . . . . . . . .3
· Production test instrumentation
· Medical electronics equipment and research
· Comb filtering and equalization
· Noise and harmonic analysis
· RMS measurements
· Frequency spectrum analysis
1
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
D68BP & D68BR Series
Fixed Frequency
Band-Pass & Band-Reject 4-Pole Pair Filters
Model D68BP4 Model D68BR4
Product Specifications Band-Pass Product Specifications Band-Reject
Size 1.8" x 0.8" x 0.3" Size 1.8" x 0.8" x 0.3"
Range fo 1 Hz to 100 kHz Range fo 1 Hz to 100 kHz
Available "Q's"1 1, 2, 5, 10 Available "Q's"1 3, 10
"Q" Accuracy ±10 % "Q" Accuracy ±10 %
Theoretical Transfer Appendix A Theoretical Transfer Appendix A
Characteristics Pages 41 & 42 Characteristics Pages 43
Notch Attenuation 45 db typ.
Pass-Band Gain 0 ± 0.2 dB typ Pass-Band Gain 0 ± 0.2 dB typ.
(non-inverting) 0 ± 0.4 dB max. (non-inverting) 0 ± 0.4 dB max.
Attenuation Rate 24 dB/octave Attenuation Rate 24 dB/octave
Center Frequency fo ±2% max. Center Frequency fo ±2% max.
Stability ±0.01%/°C Stability ±0.01%/°C
Filter Mounting FMA-01A Filter Mounting FMA-01A
Assembly Assembly
1. Q Quality Factor for band-pass and band-reject filters. Q = fO/(fH-fL) fO = fHfL
2
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
D68BP & D68BR Series
Specification Pin-Out and Package Data
(25°C and Vs ±15Vdc) Ordering Information
Analog Input Characteristics1 Pin-Out & Package Data
Impedance 10 k min.
Voltage Range ± 10 Vpeak 0.80
Max. Safe Voltage ±Vs
Side View
Analog Output Characteristics All dimensions are in inches
All case dimensions ± 0.01"
Impedance (Closed Loop) 11 typ. 0.025 dia.
10 max.
Linear Operating Range ±10V 1.80
2
Maximum Current ±2 mA
3 Front View 0.30
Offset Voltage 22 mV typ.
20 mV max. 0.15 (min)
Offset Temp. Coeff. 50 µV/°C
Power Supply (±V)
0.80
Rated Voltage ±15 Vdc 0.70
Operating Range ±5 to ±18 Vdc OUT +VS -VS OS4
Maximum Safe Voltage ±18 Vdc Bottom View
Quiescent Current ±25 mA typ.
GND IN
±40 mA max.
0.10
Temperature 0.00
0.00
0.15
0.45
0.55
1.55
1.65
1.80
Operating -20 to +70°C
Storage -25 to +85°C
Ordering Information
DC Offset Adjustment Filter Type
± Vs BP - Band Pass
BR - Band Reject
Do not connect
if trim is not D68BP4/10-849 Hz
required.
"Q"
20 k BP - 1, 2, 5, 10
(Cermet) OS BR - 3, 10 (fo) Center Frequency5
e.g., 849 Hz
2.50 kHz
33.3 kHz
Notes:
- Vs
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. Units operate with or with out offset pin connected.
5. How to Specify Center Frequency:
Center frequencies are specified by attaching a three digit frequency
designator to the basic model number. Center frequencies can range from
1.00 Hz to 100 kHz.
We hope the information given here will be helpful. The information is based on data and our best knowledge, and we consider the information to be true and accurate. Please read all statements,
recommendations or suggestions herein in conjunction with our conditions of sale which apply to all goods supplied by us. We assume no responsibility for the use of these statements,
recommendations or suggestions, nor do we intend them as a recommendation for any use which would infringe any patent or copyright. IN-D68BP/BR-04
3
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
Band-Pass
4-Pole Pair
Appendix A
Amplitude Response Curves
0 0
Q1
-10
Q1
-20 -1
-30
Q2 Q2
Amp (dB)
Amp (dB)
-40 -2
Q5
-50
-60 -3
Q5
-70
-80 -4
Q10
-90
Q10
-100 -5
2 3 4 5 6 7 8 2 3 4 5 6 7 8 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6
0.1 1.0 10.0
Normalized Frequency (f/fo) Normalized Frequency (f/fo)
Normalized Theoretical Amplitude Data
Q=1 Q=2 Q=5 Q = 10
Amp fL < fO < fH fL < fO < fH fL < fO < fH fL < fO < fH
(dB) f/fo f/fo f/fo f/fo f/fo f/fo f/fo f/fo
-0.10 0.735 1.360 0.856 1.168 0.939 1.064 0.969 1.032
-0.25 0.709 1.411 0.840 1.191 0.932 1.073 0.965 1.036
-0.50 0.687 1.456 0.826 1.211 0.926 1.080 0.962 1.039
-1.00 0.663 1.508 0.811 1.233 0.919 1.088 0.959 1.043
-1.50 0.648 1.543 0.801 1.249 0.914 1.094 0.956 1.046
-2.00 0.636 1.571 0.793 1.261 0.911 1.098 0.954 1.048
-2.50 0.627 1.596 0.787 1.271 0.908 1.102 0.953 1.050
-3.00 0.618 1.618 0.781 1.281 0.905 1.105 0.951 1.051
-5.00 0.591 1.692 0.762 1.313 0.896 1.116 0.946 1.057
-10.00 0.539 1.855 0.724 1.382 0.877 1.140 0.936 1.068
-15.00 0.493 2.027 0.688 1.454 0.858 1.165 0.926 1.080
-20.00 0.449 2.225 0.650 1.538 0.838 1.193 0.915 1.093
-25.00 0.407 2.459 0.611 1.637 0.816 1.226 0.903 1.108
-30.00 0.365 2.737 0.570 1.755 0.791 1.265 0.888 1.126
-35.00 0.326 3.065 0.527 1.896 0.763 1.311 0.872 1.146
-40.00 0.290 3.452 0.484 2.065 0.733 1.365 0.854 1.171
-45.00 0.256 3.908 0.441 2.267 0.699 1.430 0.834 1.199
-50.00 0.225 4.442 0.399 2.507 0.664 1.507 0.811 1.233
-55.00 0.197 5.067 0.358 2.793 0.625 1.599 0.786 1.273
-60.00 0.173 5.796 0.319 3.131 0.585 1.710 0.758 1.320
-65.00 0.151 6.644 0.283 3.530 0.543 1.842 0.727 1.376
-70.00 0.131 7.630 0.250 4.000 0.500 2.000 0.693 1.443
-75.00 0.114 8.774 0.220 4.550 0.457 2.189 0.657 1.523
-80.00 0.099 10.01 0.193 5.193 0.414 2.414 0.618 1.618
41
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
Band-Pass
4-Pole Pair
Appendix A
Phase Response Curves
360 360
Q10 270
270
Phase (deg)
Phase (deg)
180 180
90 90
0 0
-90 Q1 -90 Q1
Q2 Q2
-180 -180
Q5 Q5
-270 -270
Q10
-360 -360
0.6 0.7 0.8 0.9
0.1 2 3 4 5 6 78
1.0 2 3 4 5 6 7 8 10.0 1.0 1.1 1.2 1.3 1.4 1.5 1.6
Normalized Frequency (f/fo) Normalized Frequency (f/fo)
Normalized Theoretical Phase Data
Phase Q=1 Q=2 Q=5 Q = 10
Mag (+) (-) (+) (-) (+) (-) (+) (-)
(deg) f /f o f /f o f /f o f /f o f /f o f /f o f /f o f /f o
1.0 0.997 1.003 0.998 1.002 0.999 1.001 1.000 1.000
2.5 0.992 1.008 0.996 1.004 0.998 1.002 0.999 1.001
5.0 0.983 1.017 0.992 1.008 0.997 1.003 0.998 1.002
10.0 0.967 1.034 0.983 1.017 0.993 1.007 0.997 1.003
15.0 0.951 1.051 0.975 1.025 0.990 1.010 0.995 1.005
20.0 0.936 1.069 0.967 1.034 0.987 1.013 0.993 1.007
25.0 0.920 1.087 0.959 1.042 0.984 1.017 0.992 1.008
30.0 0.905 1.105 0.951 1.051 0.980 1.020 0.990 1.010
35.0 0.891 1.123 0.944 1.060 0.977 1.023 0.988 1.012
40.0 0.876 1.141 0.936 1.068 0.974 1.027 0.987 1.013
45.0 0.863 1.159 0.929 1.077 0.971 1.030 0.985 1.015
50.0 0.849 1.178 0.921 1.086 0.968 1.033 0.984 1.017
60.0 0.823 1.215 0.907 1.103 0.962 1.040 0.981 1.020
70.0 0.799 1.252 0.893 1.120 0.956 1.046 0.978 1.023
80.0 0.776 1.288 0.880 1.136 0.950 1.052 0.975 1.026
90.0 0.755 1.324 0.868 1.152 0.945 1.058 0.972 1.029
120.0 0.701 1.426 0.835 1.198 0.930 1.075 0.964 1.037
150.0 0.657 1.521 0.807 1.239 0.917 1.090 0.958 1.044
180.0 0.618 1.618 0.781 1.281 0.905 1.105 0.951 1.051
210.0 0.577 1.734 0.752 1.330 0.891 1.122 0.944 1.060
240.0 0.525 1.904 0.713 1.403 0.872 1.147 0.933 1.071
270.0 0.452 2.210 0.653 1.532 0.840 1.191 0.916 1.092
300.0 0.345 2.899 0.548 1.825 0.777 1.288 0.880 1.136
330.0 0.192 5.211 0.350 2.859 0.617 1.621 0.780 1.282
42
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
Band-Reject
4-Pole Pair
Appendix A
Amplitude Response Curves Phase Response Curves
360
0
Q3 Q10 270
-10
Phase (deg)
180
Amp (dB)
-20 Q3
90
-30
0
Q10
-40 -90
-50 -180
-60 1 -270
-70 -360
.8 .9 1.1 1.2 0.1 2 3 4 5 6 7 8 1.0 2 3 4 5 6 7 810.0
Normalized Frequency (f/fo) Normalized Frequency (f/fo)
Normalized Theoretical Amplitude Data Normalized Theoretical Phase Data
Q=3 Q = 10 Phase Q=3 Q = 10
Amp fL