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
Applications
Power line interference rejection
Transducer output filtering
Production test instrumentation
Medical electronics equipment and research
Comb filtering and equalization
Noise and harmonic analysis
RMS measurements
Frequency spectrum analysis
Features/Benefits:
Compact 32-pin footprint minimizes board space
requirements.
Plug-in ready-to-use, reducing engineering design
and manufacturing cycle time.
Factory tuned, no external clocks or adjustments
needed
Broad range of center frequencies to meet a wide
range of applications.
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.
Band Pass and Band Reject
D68BP & D68BR Series
Fixed Frequency
4-Pole Pair Filters
1
U.S. Selling Price (1-9)
$270.00 ea.
Orders for Export
U.S. Selling Price + 20%
Minimum Order Value $150.00
F.O.B. Haverhill, MA
Lead-Time: 2-4 weeks A.R.O.
Accept Visa, Mcard, Amex
Available Band-Pass Models:
. . . . . . . . . . . . .
Page
D68BP4
4 pole pair . . . . . . . . . . . . . . . . . . .2
Available Band-Reject Models:
D68BR4
4-pole pair . . . . . . . . . . . . . . . . . . .2
General Specifications:
Ordering Information . . . . . . . . . . . . . . . . . . . . . . .3
Pin-Out/Package Data . . . . . . . . . . . . . . . . . . . . . .3
Band-Pass & Band-Reject
D68BP & D68BR Series
Fixed Frequency
4-Pole Pair Filters
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
2
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 f
o
1 Hz to 100 kHz
Range f
o
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
f
o
2% max.
Center Frequency
f
o
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 = f
O
/(f
H
-f
L
)
f
O
=
f
H
f
L
D68BP & D68BR Series
Pin-Out and Package Data
Ordering Information
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
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
3
Specification
(25C and Vs 15Vdc)
DC Offset Adjustment
Vs
- Vs
20 k
(Cermet)
Do not connect
if trim is not
required.
OS
Analog Input Characteristics
1
Impedance
10 k
min.
Voltage Range
10 Vpeak
Max. Safe Voltage
Vs
Analog Output Characteristics
Impedance (Closed Loop)
1
1
typ.
10
max.
Linear Operating Range
10V
Maximum Current
2
2 mA
Offset Voltage
3
2
2 mV typ.
20 mV max.
Offset Temp. Coeff.
50
V/C
Power Supply (
V)
Rated Voltage
15 Vdc
Operating Range
5 to
18 Vdc
Maximum Safe Voltage
18 Vdc
Quiescent Current
25 mA typ.
40 mA max.
Temperature
Operating
-2
0 to +70C
Storage
-25 to +85C
Side View
0.80
0.025 dia.
All dimensions are in inches
All case dimensions
0.01"
Bottom View
+VS
OUT
-VS
IN
GND
0.80
0.70
0.10
0.00
0.00
0.15
0.45
0.55
1.55
1.65
1.80
OS
4
0.15 (min)
Front View
0.30
1.80
D68BP4/10-849 Hz
e.g.,
849 Hz
2.50 kHz
33.3 kHz
(fo) Center Frequency
5
Filter Type
BP - Band Pass
BR - Band Reject
Ordering Information
"Q"
BP - 1, 2, 5, 10
BR - 3, 10
Pin-Out & Package Data
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. 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.
Band-Pass
4-Pole Pair
Appendix A
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
Fax on Demand: 978/521-5178
Amplitude Response Curves
Normalized Theoretical Amplitude Data
Q = 1
Q = 2
Q = 5
Q = 10
Amp
f
L
< f
O
<
f
H
f
L
< f
O
<
f
H
f
L
< f
O
<
f
H
f
L
< f
O
<
f
H
(dB)
f / f
o
f / f
o
f / f
o
f / f
o
f / f
o
f / f
o
f / f
o
f / f
o
-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
0.1
1.0
10.0
2
3
4
5
6
7 8
2
3
4
5
6
7 8
Normalized Frequency (f/fo)
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
Amp (dB)
Normalized Frequency (f/fo)
1.0
0.9
0.8
0.7
0.6
-5
-4
-3
-2
-1
0
Amp (dB)
1.1
1.2
1.4
1.3
1.5 1.6
Q1
Q2
Q5
Q10
Q1
Q2
Q5
Q10
41
Band-Pass
4-Pole Pair
Appendix A
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
Fax on Demand: 978/521-5178
Phase Response Curves
Normalized Frequency (f/fo)
1.0
0.9
0.8
0.7
0.6
-360
-270
-180
-90
0
90
180
270
360
Phase (deg)
1.1 1.2
1.4
1.3
1.5 1.6
0.1
1.0
10.0
2
3 4 5 6 7 8
2
3 4 5 6 7 8
Normalized Frequency (f/fo)
-360
-270
-180
-90
0
90
180
270
360
Phase (deg)
Normalized Theoretical Phase Data
Q = 1
Q = 2
Q = 5
Q = 10
(+)
(-)
(+)
(-)
(+)
(-)
(+)
(-)
Phase
Mag
(deg)
f /fo
f /fo
f /fo
f /fo
f /fo
f /fo
f /fo
f /fo
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
Q1
Q2
Q5
Q10
Q1
Q2
Q5
Q10
42
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