828 Series
1.0 Hz to 102.4 kHz
8-Bit Programmable
Description
The 828 Series are digitally programmable low-pass
and high-pass active filters that are tunable over a
256:1 frequency range. 828 filters are available with
any one of five standard factory-set tuning ranges or
8-bit custom ranges from 1.0 Hz to 102.4 kHz.
These units contain 8 CMOS logic inputs.
All 828 Series models are convenient, low profile,
easy to use fully finished filters which require no
external components or adjustments. They feature
low harmonic distortion, and near theoretical phase
and amplitude characteristics. 828 filters operate
from non-critical ± 12 to ± 18 Vdc power supplies,
have a 10 kΩ (min.) input and a 10
Ω
(max.) output
impedance.
2" x 2"
8-Pole Filters
Features/Benefits:
•
Compact 2" x 2" design minimizes board space
requirements.
•
Low harmonic distortion and wide signal-to-noise
ratio to 16 bit resolution.
•
Digitally programmable corner frequency allows
selecting cut-off frequencies specific to each
application.
•
Plug-in ready-to-use, reducing engineering
design and manufacturing cycle time.
• Factory-set tuning range, no external clocks or
adjustments needed
• Broad range of transfer characteristics and corner
frequencies 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
Programmable Specifications:.
. . . . . . . . . . . .
Page
Digital Tuning & Control . . . . . . . . . . . . . . . . . . . . . 2
Available Low-Pass Models:
. . . . . . . . . . . . . . . . . .
828L8B
8-pole Butterworth . . . . . . . . . . . . . . . . . 3
828L8E
8-pole, 6 zero elliptic, 1.77 (-80dB) . . . . 3
828L8EX
8-pole, 6 zero elliptic, 1.56 (-80dB) . . . . 3
828L8EY
8-pole, 6 zero elliptic, 2.00 (-100dB) . . . 3
828L8L
8-pole Bessel. . . . . . . . . . . . . . . . . . . . . 4
828L8D60
8-pole constant delay (-60dB) . . . . . . . . 4
828L8D80
8-pole constant delay (-80dB) . . . . . . . . 4
828L8D10
8-pole constant delay (-100dB) . . . . . . . . 4
Available High-Pass Models:
. . . . . . . . . . . . . . . . . .
828H8B
8-pole Butterworth . . . . . . . . . . . . . . . . . 5
828H8E
8-pole, 6 zero elliptic, 1.77 (-80dB) . . . . . 5
828H8EX
8-pole, 6 zero elliptic, 1.56 (-80dB) . . . . . 5
828H8EY
8-pole, 6 zero elliptic, 2.00 (-100dB) . . . . 5
General Specifications:
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin-out/package data . . . . . . . . . . . . . . . . . . . . . . . . 6
1784 Chessie Lane, Ottawa, IL 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176
e-mail: sales@freqdev.com • Web Address: http://www.freqdev.com
828 Series
8-Bit Programmable Filters
Digital Tuning Characteristics
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 (D
0
- D
7
).
Filter tuning follows the tuning equation given below:
f
c
= ( f
max
/256 ) [ 1 + D
7
x 2 + D
6
x 2 + D
5
x 2 + D
4
x 2 +
D
3
x 2 + D
2
x 2 + D
1
x 2 + D
0
x 2 ]
where D
1
- D
7
= "0" or "1", and
f
max
= Maximum tuning frequency;
f
c
= corner frequency;
Minimum tunable frequency = f
max
/256 (D
0
thru D
7
= 0);
Minimum frequency step (Resolution) = f
max
/256
2.00
OUT +Vs -Vs
D
7
D
6
D
5
D
4
GND
D
3
D
2
D
1
D
0
IN Os
4
3
2
1
0
7
6
5
4
Digital Tuning &
Control Characteristics
Pin-Out Key
IN
OUT
GND
+Vs
-Vs
Os
Analog Input Signal
Analog Output Signal
Power and Signal Return
Supply Voltage, Positive
Supply Voltage, Negative
Offset Adjustment
D
7
Tuning
D
6
Tuning
D
5
Tuning
D
4
Tuning
D
3
Tuning
D
2
Tuning
D
1
Tuning
D
0
Tuning
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
7 (MSB)
6
5
4
3
2
1
0 (LSB)
Data Input Specifications
Input Data Levels
(CMOS Logic)
4 Vdc max.
15 Vdc max.
-1
µA
max.
.
+1
µA
max.
7.5 pF max.
Input Voltage (Vs = 15 Vdc)
Low Level In
0 Vdc min.
High Level In
11 Vdc min.
Input Current
High Level In
Low Level In
Input Capacitance
Input Data Format
Positive Logic
Bit Weighting
D
0
D
7
Frequency Range
- 10
µA
typ.
-5
+10
µA
typ
.
5 pF typ
-5
Bottom View
MSB
2
7
---
2
6
---
2
5
---
2
4
---
2
3
---
2
2
---
2
1
LSB
2
0
Bit
Weight
Corner
Frequency
Frequency Select Bits
Logic "1" = +Vs
Logic "0" = Gnd
(Binary-Coded)
LSB (least significant bit)
MSB (most significant bit)
256 : 1, Binary Weighted
fc
D
7
0
0
0
0
0
0
0
0
1
D
6
0
0
0
0
0
0
0
1
1
D
5
0
0
0
0
0
0
1
1
1
D
4
0
0
0
0
0
1
1
1
1
D
3
0
0
0
0
1
1
1
1
1
D
2
0
0
0
1
1
1
1
1
1
D
1
0
0
1
1
1
1
1
1
1
D
0
0
1
1
1
1
1
1
1
1
f
max
/256
f
max
/128
f
max
/64
f
max
/32
f
max
/16
f
max
/8
f
max
/4
f
max
/2
fmax
2
1784 Chessie Lane, Ottawa, IL 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176
e-mail: sales@freqdev.com • Web Address: http://www.freqdev.com
828 Series
8-Bit Programmable
Model
Product Specifications
Transfer Function
Size
Range f
c
, f
r
Theoretical Transfer
Characteristics
Passband Ripple
(theoretical)
8-Pole
Low-Pass Filters
828L8E
828L8EX
828L8EY
828L8B
8-Pole
Butterworth
2.0” x 2.0” x 0.5”
1.0 Hz to 102.4 kHz
Appendix A
Page 9
0.0 dB
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
48 dB/octave
f
c
± 0.01% /°c
-3 dB
-360°
0.12 dB
3.01 dB
60.0 dB
80.0 dB
0 - 0.8 f
c
± 2% max.
8-Pole, 6 zero
Elliptic
2.0” x 2.0” x 0.5”
1.0 Hz to 102.4 kHz
Appendix A
Page 24
± 0.035 dB
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
80 dB min.
f
r
± 0.01% /°c
-0.035 dB
-323.5°
0.035 dB
3.01 dB
60.0 dB
80.0 dB
0 - 0.8 f
r
± 2% max.
8-Pole, 6 zero
Elliptic
2.0” x 2.0” x 0.5”
1.0 Hz to 102.4 kHz
Appendix A
Page 23
- 0.05 dB
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
80 dB min.
f
r
± 0.01% /°c
-0.05dB
-414°
0.05 dB
3.01 dB
60.0 dB
80.0 dB
0 - 0.8 f
r
± 2% max.
8-Pole, 6 zero
Elliptic
2.0” x 2.0” x 0.5”
1.0 Hz to 102.4 kHz
Appendix A
Page 25
- 0.05 dB
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
100 dB min.
f
r
± 0.01% /°c
-0.05 dB
-419°
0.05 dB
3.01 dB
80.0 dB
100.0 dB
0 - 0.8 f
r
0.8 f
r
- 1.0 f
r
0 - 0.8 f
r
0.8 f
r
- 1.0 f
r
± 2% max.
DC Voltage Gain
(non-inverting)
Stopband
Attenuation Rate
Cutoff Frequency
Stability
Amplitude
Phase
Filter Attenuation
(theoretical)
0.80 f
c
1.00 f
c
2.37 f
c
3.16 f
c
1.00 f
r
1.13 f
r
1.67 f
r
1.77 f
r
1.00 f
r
1.05 f
r
1.45 f
r
1.56 f
r
1.00 f
r
1.06 f
r
1.83 f
r
2.00 f
r
± 3° max.
± 1.5° typ.
± 4° max.
± 2° typ.
± 0.2 dB max.
± 0.1 dB typ.
± 0.5 dB max.
± 0.25 dB typ.
Phase Match
1
± 2° max.
± 1° typ.
0.8 fc - 1.0 f
c
± 3° max.
± 1.5° typ.
0 - 0.8 f
c
± 0.2 dB max.
± 0.1 dB typ.
0.8 f
c
- 1.0 f
c
± 0.3 dB max.
± 0.15 dB typ.
± 2° max.
± 1° typ.
0.8 f
r
- 1.0 f
r
± 4° max.
± 2° typ.
± .2 dB max.
± .1 dB typ.
0.8 f
r
- 1.0 f
r
± .3 dB max.
± .15 dB typ.
< - 88 dB typ.
200
µVrms
typ.
50
µVrms
typ.
0 - 0.8 f
r
± 3° max.
± 1.5° typ.
0.8 f
r
- 1.0 f
r
± 4° max.
± 2° typ.
0 - 0.8 f
r
± 0.2 dB max.
± 0.1 dB typ.
0.8 f
r
- 1.0 f
r
± 0.5 dB max.
± 0.25 dB typ.
< - 88 dB typ.
250
µVrms
typ.
75
µVrms
typ.
Amplitude Accuracy
(theoretical)
Total Harmonic
Distortion @ 1kHz
Wide Band Noise
(5 Hz - 2 MHz)
< - 100 dB typ.
200
µVrms
typ.
50
µVrms
typ.
< - 88 dB typ.
250
µVrms
typ.
75
µVrms
typ.
Narrow Band Noise
(5 Hz - 100 kHz)
Filter Mounting
Assembly
FMA-02A
FMA-02A
FMA-02A
FMA-02A
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
1784 Chessie Lane, Ottawa, IL 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176
e-mail: sales@freqdev.com • Web Address: http://www.freqdev.com
828 Series
8-Bit Programmable
Model
Product Specifications
Transfer Function
Size
Range f
c
Theoretical Transfer
Characteristics
Passband Ripple
(theoretical)
8-Pole
Low-Pass Filters
828L8D60
828L8D80
828L8D10
828L8L
8-Pole
Bessel
2.0” x 2.0” x 0.5”
1.0 Hz to 102.4 kHz
Appendix A
Page 4
0.0 dB
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
48 dB/octave
f
c
± 0.01% /°c
-3 dB
-182°
1.91 dB
3.01 dB
60.0 dB
80.0 dB
0 - f
c
0 - f
c
± 2% max.
8-Pole, 6 zero
Constant Delay
2.0” x 2.0” x 0.5”
1.0 Hz to 102.4 kHz
Appendix A
Page 20
0.15 dB
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
60 dB min.
f
c
± 0.01% /°c
-3 dB
-306°
3.01 dB
40.0 dB
60.0 dB
0 - f
c
0 - 0.8 f
c
± 2% max.
8-Pole, 6 zero
Constant Delay
2.0” x 2.0” x 0.5”
1.0 Hz to 102.4 kHz
Appendix A
Page 21
0.15 dB
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
80 dB min.
f
c
± 0.01% /°c
-3 dB
-306°
3.01 dB
60.0 dB
80.0 dB
0 - f
c
0 - 0.8 f
c
± 2% max.
8-Pole, 6 zero
Constant Delay
2.0” x 2.0” x 0.5”
1.0 Hz to 102.4 kHz
Appendix A
Page 22
0.15 dB
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
100 dB min.
f
c
± 0.01% /°c
-3 dB
-311°
3.01 dB
80.0 dB
100.0 dB
0 - f
c
0 - 0.8 f
c
0.8 f
c
- 1.0 f
c
± 2% max.
DC Voltage Gain
(non-inverting)
Stopband
Attenuation Rate
Cutoff Frequency
Stability
Amplitude
Phase
Filter Attenuation
(theoretical)
0.80 f
c
1.00 f
c
4.52 f
c
6.07 f
c
± 2° max.
± 1° typ.
± 0.2 dB max.
± 0.1 dB typ.
1.00 f
c
2.28 f
c
2.64 f
c
± 2° max.
± 1° typ.
1.00 f
c
3.08 f
c
3.57 f
c
± 2° max.
± 1° typ.
1.00 f
c
4.45 f
c
5.20 f
c
± 2° max.
± 1° typ.
± 0.2 dB max.
± 0.1 dB typ.
± 0.3 dB max.
± 0.15 dB typ.
Phase Match
1
Amplitude Accuracy
(theoretical)
± 0.2 dB max.
± 0.1 dB typ.
0.8 f
c
- 1.0 f
c
± 0.3 dB max.
± 0.15 dB typ.
< - 100 dB typ.
200
µVrms
typ.
50
µVrms
typ.
± 0.2 dB max.
± 0.1 dB typ.
0.8 f
c
- 1.0 f
c
± 0.3 dB max.
± 0.15 dB typ.
< - 100 dB typ.
200
µVrms
typ.
50
µVrms
typ.
Total Harmonic
Distortion @ 1kHz
Wide Band Noise
(5 Hz - 2 MHz)
< - 100 dB typ.
200
µVrms
typ.
50
µVrms
typ.
< - 100 dB typ.
200
µVrms
typ.
50
µVrms
typ.
Narrow Band Noise
(5 Hz - 100 kHz)
Filter Mounting
Assembly
FMA-02A
FMA-02A
FMA-02A
FMA-02A
1.Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
4
1784 Chessie Lane, Ottawa, IL 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176
e-mail: sales@freqdev.com • Web Address: http://www.freqdev.com
828 Series
8-Bit Programmable
Model
Product Specifications
Transfer Function
Size
Range f
c,
f
r
Theoretical Transfer
Characteristics
Passband Ripple
(theoretical)
8-Pole
High-Pass Filters
828H8E
828H8EX
828H8EY
828H8B
8-Pole
Butterworth
2.0” x 2.0” x 0.5”
1.0 Hz to 102.4 kHz
Appendix A
Page 29
0.0 dB
0 ± 0.2 dB to 100 kHz
0 ± 0.5 dB to 120 kHz
120 kHz
(-6 dB) 1 MHz
8-Pole, 6 zero
Elliptic
2.0” x 2.0” x 0.5”
1.0 Hz to 102.4 kHz
Appendix A
Page 37
± 0.035 dB
0 ± 0.2 dB to 100 kHz
0 ± 0.5 dB to 120 kHz
120 kHz
(-6 dB) 1 MHz
8-Pole, 6 zero
Elliptic
2.0” x 2.0” x 0.5”
1.0 Hz to 102.4 kHz
Appendix A
Page 36
- 0.05 dB
0 ± 0.2 dB to 100 kHz
0 ± 0.5 dB to 120 kHz
120 kHz
(-6 dB) 1 MHz
8-Pole, 6 zero
Elliptic
2.0” x 2.0” x 0.5”
1.0 Hz to 102.4 kHz
Appendix A
Page 38
- 0.05 dB
0 ± 0.2 dB to 100 kHz
0 ± 0.5 dB to 120 kHz
120 kHz
(-6 dB) 1 MHz
Voltage Gain
(non-inverting)
Power Bandwidth
Small Signal
Bandwidth
Stopband
Attenuation Rate
Cutoff Frequency
Stability
Amplitude
Phase
Filter Attenuation
(theoretical)
48 dB/octave
f
c
± 0.01% /°c
-3 dB
-360°
80 dB
60.0 dB
3.01 dB
0.00 dB
± 2% max.
80 dB
f
r
± 0.01% /°c
-0.035 dB
-323.5°
80 dB
60.0 dB
3.01 dB
0.03 dB
0.00 dB
f
r
- 1.25 f
r
± 2% max.
80 dB
f
r
± 0.01% /°c
-0.05dB
-414°
80 dB
60.0 dB
3.01 dB
0.03 dB
0.00 dB
f
r
- 1.25 f
r
± 2% max.
100 dB
f
r
± 0.01% /°c
-0.05 dB
-419°
100 dB
80.0 dB
3.01 dB
0.03 dB
0.00 dB
f
r
- 1.25 f
r
± 2% max.
0.31 f
c
0.42 f
c
1.00 f
c
2.00 f
c
0.56 f
r
0.60 f
r
0.88 f
r
1.00 f
r
2.00 f
r
0.64 f
r
0.69 f
r
0.95 f
r
1.00 f
r
2.00 f
r
0.50 f
r
0.55 f
r
0.94 f
r
1.00 f
r
2.00 f
r
Phase Match
1
f
c
- 100 kHz ± 3° max.
± 1.5° typ.
± 4° max.
± 2° typ.
1.25 f
r
-100 kHz ± 2° max.
± 1° typ.
± 4° max.
± 2° typ.
1.25f
r
-100 kHz ± 2° max.
± 1° typ.
± 4° max.
± 2° typ.
1.25 f
r
-100 kHz ± 3° max.
± 1.5° typ.
± 0.5 dB max.
± 0.25 dB typ.
± 0.2 dB max.
± 0.1 dB typ.
Amplitude Accuracy
(theoretical)
± 0.3 dB max. f
r
-1.25 f
r
± 0.15 dB typ.
1.25 f
c
-100kHz± 0.2 dB max. 1.25 f
r
-100 kHz
± 0.1 dB typ.
< - 100 dB typ.
400
µVrms
typ.
100
µVrms
typ.
< - 88 dB typ.
f
c
-1.25 f
c
± 0.3 dB max. f
r
-1.25 f
r
± 0.15 dB typ.
± 0.2 dB max. 1.25 f
r
-100 kHz
± 0.1 dB typ.
< - 88 dB typ.
± 0.5 dB max. f
r
-1.25 f
r
± 0.25 dB typ.
± 0.2 dB max. 1.25 f
r
-100 kHz
± 0.1 dB typ.
< - 88 dB typ.
Total Harmonic
Distortion @ 1kHz
Wide Band Noise
(5 Hz - 2 MHz)
400
µVrms
typ.
100
µVrms
typ.
500
µVrms
typ.
150
µVrms
typ.
500
µVrms
typ.
150
µVrms
typ.
Narrow Band Noise
(5 Hz - 100 kHz)
Filter Mounting
Assembly
FMA-02A
FMA-02A
FMA-02A
FMA-02A
1.Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
5
1784 Chessie Lane, Ottawa, IL 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176
e-mail: sales@freqdev.com • Web Address: http://www.freqdev.com
