ETC 824BP

824BP Series
8 Bit Programmable
2-Pole Pair Filters
Band Pass
Description:
The 824BP Series is a 2-pole-pair digitally
programmable precision band-pass active filter that
provides high performance in a compact 2" x 2"
footprint. These new filters take advantage of the
company’s proprietary designs using surface-mount
technology to provide a low profile, compact package
in minimal board space. 824BP filters are factory
tuned to one of three factory set tuning ranges or 8bit custom ranges from 1 Hz to 25.6 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 center frequency,
band-pass 824BP filters pass all frequencies lying
between the upper and lower -3dB points of the
amplitude response curve. Available Q’s for 824BP
models are 1, 2, 5, or 10.
Features/Benefits:
• Compact 2.0"L x 2.0"W 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.
Applications
• Power line interference rejection
Programmable Specifications: . . . . . . . . . . . .Page
Digital Tuning & Control . . . . . . . . . . . . . . . . . . . . .2
Available Band-Pass Models:
824BP2
2 pole pair . . . . . . . . . . . . . . . . . . .3
General Specifications:
Ordering Information . . . . . . . . . . . . . . . . . . . . . . .4
Pin-Out/package data . . . . . . . . . . . . . . . . . . . . . .4
• Transducer output filtering
• Production test instrumentation
• Medical electronics equipment and research
• Comb filtering and equalization
• Noise and harmonic analysis
• RMS measurements
• Frequency spectrum analysis
1
25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839
e-mail: [email protected] • Web Address: http://www.freqdev.com
824BP Series
Digital Tuning &
Control Characteristics
8-Bit Programmable Filters
Digital Tuning Characteristics
Pin-Out Key
The digital tuning interface circuits are a parallel set of eight
(8) 4053 CMOS switches which accept CMOS compatible
inputs for the eight tuning bits (D0 - D7).
IN
OUT
GND
+Vs
-Vs
Os
Filter tuning follows the tuning equation given below:
7
6
5
4
fc = ( fmax/256 ) [ 1 + D7 x 2 + D6 x 2 + D5 x 2 + D4 x 2 +
3
2
1
Analog Input Signal
Analog Output Signal
Power and Signal Return
Supply Voltage, Positive
Supply Voltage, Negative
Offset Adjustment
D7 Tuning
D6 Tuning
D5 Tuning
D4 Tuning
D3 Tuning
D2 Tuning
D1 Tuning
D0 Tuning
0
D3 x 2 + D2 x 2 + D1 x 2 + D0 x 2 ]
where D1 - D7 = "0" or "1", and
fmax = Maximum tuning frequency;
fc = corner frequency;
Minimum tunable frequency = fmax/256 (D0 thru D7 = 0);
Minimum frequency step (Resolution) = fmax/256
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
7 (MSB)
6
5
4
3
2
1
0 (LSB)
OUT +Vs -Vs
D7
D6
D5
D4
GND
2.00
Data Input Specifications
D3
Input Data Levels
(CMOS Logic)
Input Voltage (Vs = 15 Vdc)
Low Level In
0 Vdc min.
High Level In
11 Vdc min.
D2
D1
D0
4 Vdc max.
15 Vdc max.
IN Os
Input Current
High Level In
Low Level In
- 10 mA typ.
-5
+10 mA typ.
-1 mA max..
+1 mA max.
Input Capacitance
5 pF typ
7.5 pF max.
Input Data Format
Frequency Select Bits
Positive Logic
Logic "1" = +Vs
Logic "0" = Gnd
Bit Weighting
D0
D7
(Binary-Coded)
LSB (least significant bit)
MSB (most significant bit)
Frequency Range
256 : 1, Binary Weighted
-5
4
Bottom View
MSB
7
--6
--5
--4
--3
--2
--1
LSB
0
Bit
Weight
2
2
2
2
2
2
2
2
fc
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
fmax/256
0
0
0
0
0
0
0
1
fmax/128
0
0
0
0
0
0
1
1
fmax/64
0
0
0
0
0
1
1
1
fmax/32
0
0
0
0
1
1
1
1
fmax/16
0
0
0
1
1
1
1
1
fmax/8
0
0
1
1
1
1
1
1
fmax/4
0
1
1
1
1
1
1
1
fmax/2
1
1
1
1
1
1
1
1
fmax
Corner
Frequency
2
25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839
e-mail: [email protected] • Web Address: http://www.freqdev.com
824BP Series
8-Bit Programmable
2-Pole Pair Filters
Band-Pass
Model
Product Specifications
824BP2
Band-Pass
Size Model 2
Model 3 & 4
2.0" x 2.0" x 0.5"
2.0" x 2.0" x 0.4"
Range fo
1 Hz to 25.6 kHz
Available "Q’s"1
1, 2, 5, 10
"Q" Accuracy
±10 %
Theoretical Transfer
Characteristics
Appendix A
Pages 39 & 40
Pass-Band Gain
(non-inverting)
0 ± 0.25 dB typ
0 ± 0.50 dB max.
Attenuation Rate
12 dB/octave
Center Frequency
fo
Stability
±0.01%/°C
Filter Mounting
Assembly
FMA-02A
±2% max.
1. Q – Quality Factor for band-pass filters. Q = fO/(fH-fL)
fO =
√ fHfL
3
25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839
e-mail: [email protected] • Web Address: http://www.freqdev.com
824BP Series
Pin-Out and Package Data
Ordering Information
Specification
(25°C and Vs ±15Vdc)
Analog Input Characteristics1
Impedance
Voltage Range
Max. Safe Voltage
Analog Output Characteristics
Impedance (Closed Loop)
Linear Operating Range
2
Maximum Current
3
Offset Voltage
Offset Temp. Coeff.
Power Supply (±V)
Rated Voltage
Operating Range
Maximum Safe Voltage
Pin-Out & Package Data
10 k W min.
± 10 Vpeak
±Vs
2.00
G-3
0.5 0.4
11 W typ.
10 W max.
±10V
±2 mA
22 mV typ.
20 mV max.
50 mV/°C
G-1
0.15 min.
Side View
0.025 Dia.
All dimensions are in inches
All Case Dimensions ± 0.02"
Grid Dimensions 0.1" x 0.1"
OUT +Vs -Vs
D7
±15 Vdc
±12 to ±18 Vdc
±18 Vdc
D6
D5
D4
GND
2.00
±13 mA typ.
±20 mA max.
Quiescent Current
Temperature
Operating
Storage
D3
D2
D1
-20 to +70°C
-25 to +85°C
D0
IN Os
Notes:
4
Bottom View
1. Input and output signal voltage referenced to supply common.
2. Output is short circuit protected to common.
DO NOT CONNECT TO ±Vs.
Filter Mounting Assembly-See FMA-02A
3. Adjustable to zero.
Ordering Information
4. Units operate with or without offset pin connected.
DC Offset Adjustment
824BP2/10-3
± Vs
“Q”
1, 2, 5, 10
Do not connect
if trim is not
required.
20 k W
(Cermet)
Model
OS
Model
Number
2
3
4
Tuning
Range (Hz)
1.0 to 256
10 to 2560
100 to 25.6k
Minimum
Step(Hz)
1.0
10
100
Case
G-3
G-1
G-1
- Vs
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.
PR-824BP-01
4
25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839
e-mail: [email protected] • Web Address: http://www.freqdev.com
Product Handling
Procedure
Programmable Filter Modules Power Sequence & ESD
November 2000
Programmable Filters Modules
818, 824, 828, 828BP, 828BR, 854, 858, R854, R858
I. Scope
The following precautions are necessary when handling and installing Frequency Devices
programmable filter modules.
II. Digital Circuit Description
The digital input pins connect directly to 4000 series CMOS logic, such as the 4053 analog switch. The
power supply (Vss) for the digital logic on the module comes directly from the +15 Volt pin on the
module. This sets the threshold voltage at 11.0 V minimum to 15.0 V maximum for a "1" (High) level
and 0.0 V minimum to 4.0 V maximum for a "0" (Low) level. Applying a voltage between 4.0 and 11.0
V will produce unpredictable operation. Connecting 5 Volt or 3.3 V logic devices directly to the filter
module without using a voltage translator will result in erratic operation of the filter.
III. (VERY IMPORTANT) Power-Up and Power-Down Sequence
Do not plug-in or un-plug module while power is applied. It is imperative that power is
supplied to the + 15 V pin on the filter module before or at the same instance that any digital pin is
pulled High (> 0.0 V). Failure to do this will result in excessive current flowing through the digital input
pin and through a protection diode internal to the 4000 logic, which will result in damage to the module.
The proper power-up and power-down sequence is:
1. Connect filter module ground.
2. Connect filter module +15 V.
3. Connect filter module -15 V.
4. Connect the input signal.
All four of the above steps can also occur simultaneously. Power-down should occur in the reverse
order.
IV. ESD Issues
Like most modern electronic equipment, the modules can be damaged by electrostatic discharge (ESD).
The modules are shipped from the factory in sealed, anti-static packaging and should be kept in the
sealed package prior to mounting on a circuit board. The following additional rules should also be
observed when handling the modules after they are removed from the factory packaging:
1. Only a person wearing a properly grounded wrist strap should handle the modules.
2. Any work surface that the modules are placed on must be properly ESD grounded.
3. Any insulating materials capable of generating static charge (such as paper) should be kept
away from the modules.
Static generating clothing should be covered with an ESD-protective smock.
1
25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839
e-mail: [email protected] • Web Address: http://www.freqdev.com
Band-Pass
2-Pole Pair
Appendix A
0
-10
-20
-30
-40
-50
-60
-70
-80
0.1
0
Q1
Q2
Amp (dB)
Amp (dB)
Amplitude Response Curves
Q5
Q10
Q1
-1
Q2
-2
Q5
-3
-4
Q10
2
3 4 5 6 78
1.0 2 3 4 5 6 7 8 10.0
Normalized Frequency (f/fo)
Q=1
Amp
(dB)
-0.10
-0.25
-0.50
-1.00
-1.50
-2.00
-2.50
-3.00
-5.00
-10.00
-15.00
-20.00
-25.00
-30.00
-35.00
-40.00
-45.00
-50.00
-55.00
-60.00
-65.00
-70.00
-75.00
-80.00
fL < fO < fH
f /fO
0.824
0.783
0.747
0.705
0.677
0.654
0.635
0.618
0.563
0.457
0.368
0.290
0.225
0.173
0.131
0.099
0.075
0.056
0.042
0.032
0.024
0.018
0.013
0.010
f /fO
1.214
1.277
1.338
1.418
1.478
1.529
1.574
1.617
1.776
2.189
2.720
3.445
4.439
5.795
7.630
10.09
13.41
17.83
23.75
31.65
42.19
56.25
75.00
100.0
Q=2
0.7
0.8
Q=5
fL < fO < fH
f /fO
0.907
0.884
0.863
0.837
0.820
0.805
0.792
0.781
0.742
0.657
0.572
0.485
0.399
0.319
0.250
0.193
0.147
0.111
0.084
0.063
0.047
0.036
0.027
0.020
-5
0.6
fL < fO < fH
f /fO
1.102
1.131
1.159
1.194
1.220
1.242
1.262
1.280
1.348
1.523
1.748
2.062
2.506
3.130
3.999
5.192
6.814
9.002
11.94
15.87
21.13
28.15
37.52
50.01
39
f /fO
0.962
0.952
0.943
0.931
0.923
0.916
0.910
0.905
0.886
0.842
0.792
0.733
0.664
0.585
0.500
0.414
0.333
0.262
0.202
0.154
0.117
0.088
0.066
0.050
f /fO
1.040
1.051
1.061
1.074
1.083
1.091
1.098
1.105
1.129
1.188
1.263
1.364
1.507
1.709
2.000
2.414
3.001
3.819
4.945
6.479
8.552
11.33
15.06
20.05
0.9
1.0 1.1 1.2 1.3 1.4 1.5 1.6
Normalized Frequency (f/fo)
Q = 10
fL < fO < fH
f /fO
0.981
0.976
0.971
0.965
0.961
0.957
0.954
0.951
0.941
0.917
0.889
0.855
0.811
0.758
0.693
0.618
0.535
0.449
0.365
0.290
0.225
0.172
0.131
0.099
f /fO
1.020
1.025
1.030
1.036
1.041
1.045
1.048
1.051
1.062
1.090
1.125
1.170
1.233
1.320
1.443
1.618
1.869
2.228
2.737
3.453
4.443
5.798
7.632
10.10
25 Locust St., Haverhill, Massachusetts 01830 ∑Tel:800/252-7074, 978/374-0761 ∑FAX:978/521-1839
e-mail: [email protected] ∑Web Address: http://www.freqdev.com ∑Fax on Demand: 978/521-5178
Band-Pass
2-Pole Pair
Appendix A
Phase Response Curves
180
180
Phase (deg)
Phase (deg)
Q10
90
0
Q1
Q2
-90
90
0
Q1
Q2
-90
Q5
Q10
-180
0.1
2
3 4 5 6 78
1.0 2 3 4 5 6 7 8 10.0
Normalized Frequency (f/fo)
-180
0.6
0.7
0.8
Q5
0.9
1.0 1.1 1.2 1.3 1.4 1.5 1.6
Normalized Frequency (f/fo)
Normalized Theoretical Phase Data
Phase
Mag
(deg)
1.0
2.5
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
60.0
70.0
80.0
90.0
105.0
120.0
135.0
150.0
165.0
180.0
Q=1
(+)
(-)
f /fO f /fO
0.994 1.006
0.985 1.016
0.970 1.031
0.940 1.063
0.913 1.096
0.886 1.128
0.861 1.161
0.838 1.194
0.815 1.227
0.794 1.259
0.774 1.292
0.755 1.324
0.719 1.391
0.685 1.460
0.652 1.535
0.618 1.618
0.564 1.772
0.502 1.991
0.424 2.356
0.320 3.126
0.177 5.639
0
inf
Q=2
(+)
(-)
f /fO f /fO
0.997 1.003
0.992 1.008
0.985 1.016
0.970 1.031
0.955 1.047
0.941 1.062
0.928 1.078
0.915 1.093
0.902 1.108
0.891 1.123
0.879 1.138
0.868 1.152
0.846 1.182
0.825 1.212
0.803 1.245
0.781 1.281
0.743 1.346
0.695 1.439
0.628 1.594
0.520 1.923
0.327 3.058
0
inf
40
Q=5
(+)
(-)
f /fO f /fO
0.999 1.001
0.997 1.003
0.994 1.006
0.988 1.012
0.982 1.018
0.976 1.025
0.970 1.030
0.965 1.036
0.960 1.042
0.955 1.048
0.950 1.053
0.945 1.059
0.935 1.069
0.925 1.081
0.916 1.092
0.905 1.105
0.887 1.128
0.862 1.160
0.825 1.212
0.758 1.319
0.593 1.686
0
inf
Q = 10
(+)
(-)
f /fO f /fO
0.999 1.001
0.998 1.002
0.997 1.003
0.994 1.006
0.991 1.009
0.988 1.012
0.985 1.015
0.982 1.018
0.980 1.021
0.977 1.024
0.974 1.026
0.972 1.029
0.967 1.034
0.962 1.040
0.957 1.045
0.951 1.051
0.941 1.062
0.928 1.077
0.908 1.101
0.869 1.150
0.764 1.310
0
inf
25 Locust St., Haverhill, Massachusetts 01830 ∑Tel:800/252-7074, 978/374-0761 ∑FAX:978/521-1839
e-mail: [email protected] ∑Web Address: http://www.freqdev.com ∑Fax on Demand: 978/521-5178