854 Series
0.1 Hz to 102.4 kHz
8-Bit Programmable
Description
The 854 Series are digitally programmable low-pass
and high-pass active filters that are tunable over a
256:1 frequency range. 854 filters are available with
any one of six standard factory-set tuning ranges up
to 102.4 kHz. These units contain 8 CMOS logic
inputs that can be operated in a transparent or
latching mode.
All 854 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. 854 filters operate
from non-critical ±12 to ±18 Vdc power supplies,
have a 10 kΩ (min.) input impedance, a 10
Ω
(max.)
output impedance and offer dc voltage offset
adjustment.
Features/Benefits:
• 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.
• Low profile design, ideal for rack mount
installations.
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:
. . . . . . . . . . . . . . . . . . .
854L4B 4-pole Butterworth . . . . . . . . . . . . . . . . . . 3
854L4L
4-pole Bessel . . . . . . . . . . . . . . . . . . . . . . 3
854L8Y2 4-pole Cheby (0.2 dB Ripple) . . . . . . . . . . 3
854L8Y5 4-pole Cheby (0.5 dB Ripple) . . . . . . . . . . 3
Available High-Pass Models:
. . . . . . . . . . . . . . . . . .
854H8B 4-pole Butterworth . . . . . . . . . . . . . . . . . . 4
854H8Y2 4-pole Cheby (0.2 dB Ripple) . . . . . . . . . . 4
854H8Y5 4-pole Cheby (0.5 dB Ripple) . . . . . . . . . . 4
General Specifications:
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin-out/package data. . . . . . . . . . . . . . . . . . . . . . . . . 5
2" x 4"
4-Pole 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
854 Series
8-Bit Programmable Filters
Digital Tuning Characteristics
The digital tuning interface circuits are two 4042 quad CMOS
latches which accept the following CMOS-compatible inputs:
eight tuning bits (D
0
- D
7
), a latch strobe bit (C), and a transition
polarity bit (P).
Filter tuning follows the tuning equation given below:
f
c
= ( f
max
/256 ) [ 1 + D
7
x 2
7
+ D
6
x 2
6
+ D
5
x 2
5
+ D
4
x 2
4
+ D
3
x 2
3
+ D
2
x 2
2
+ D
1
x 2
1
+ D
0
x 2
0
]
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
Pin-Out Key
IN
OUT
GND
"P"
"C"
+Vs
-Vs
Os
Analog Input Signal
Analog Output Signal
Power and Signal Return
Transition Polarity Bit
Tuning Strobe Bit
Supply Voltage, Positive
Supply Voltage, Negative
Optional 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)
Digital Tuning &
Control Characteristics
OUT +Vs -Vs
D
7
D
6
D
5
D
4
GND
D
3
D
2
D
1
D
0
IN Os
Data Control Specifications
Data Control Lines
Functions
Data Control Modes
Mode 1
Mode 2
Input Data Levels
Latch Strobe (C)
Transition Polarity (P)
P = 0; C = 0
P = 0; C = 0›
P = 1; C = 1
P = 1; C = 1fl
(CMOS Logic)
0 Vdc min.
11 Vdc min.
-1
mA
max.
+1
mA
max.
7.5 pF max.
0
25 nS
50 nS
80 nS min.
Frequency Select Bits
Logic "1" = +Vs
Logic "0" = Gnd
(Binary-Coded)
LSB (least significant bit)
MSB (most significant bit)
256 : 1, Binary Weighted
0
0
0
0
1
0
0
0
0
1
1
0
0
0
1
1
1
0
0
1
1
1
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4 Vdc max.
15 Vdc max.
frequency follows input codes
frequency latched on rising edge
frequency follows input codes
frequency latched on falling edge
Bottom View
---
2
5
D
5
0
0
0
---
2
4
D
4
0
0
0
---
2
3
D
3
0
0
0
---
2
2
D
2
0
0
0
---
2
1
D
1
0
0
1
P C
MSB
2
7
D
7
0
0
0
---
2
6
D
6
0
0
0
LSB
2
0
D
0
0
1
1
Bit
Weight
fc
Corner
Frequency
Input Voltage (Vs = 15 Vdc)
Low Level In
High Level In
Input Current
High Level In
Low Level In
Input Capacitance
Latch Response
1
Data Set Up Time
2
Data Hold Time
Strobe Pulse Width
Input Data Format
Positive Logic
Bit Weighting
D
0
D
7
Frequency Range
- 10
-5
mA
typ.
+10
-5
mA
typ
.
5 pF typ
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
Notes:
1. Frequency data must be present before occurrence of strobe edge.
2. Frequency data must be present after occurrence of strobe edge.
2
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
854 Series
8-Bit Programmable
Model
Product Specifications
Transfer Function
Size, Model 1 & 2
Model 3 thru 6
Range f
c
Theoretical Transfer
Characteristics
Passband Ripple
(theoretical)
4-Pole
Low-Pass Filters
854L8L
854L8Y2
854L8Y5
854L8B
4-Pole,
Butterworth
4.0” x 2.0” x 0.6”
4.0” x 2.0” x 0.4”
0.1 Hz to 102.4 kHz
Appendix A
Page 7
0.0 dB
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
24 dB/octave
f
c
± 0.01% /°C
-3 dB
-180°
0.67 dB
3.01 dB
30.0 dB
40.0 dB
0 - 0.8 f
c
± 2% max.
4-Pole,
Bessel
4.0” x 2.0” x 0.6”
4.0” x 2.0” x 0.4”
0.1 Hz to 102.4 kHz
Appendix A
Page 2
0.0 dB
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
24 dB/octave
f
c
± 0.01% /°C
-3 dB
-121°
1.86 dB
3.01 dB
30.0 dB
40.0 dB
0 - f
c
± 2% max.
4-Pole, Chebychev,
0.2 dB Ripple
4.0” x 2.0” x 0.6”
4.0” x 2.0” x 0.4”
0.1 Hz to 102.4 kHz
Appendix A
Page 12
0.20 dB
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
24 dB/octave
f
c
± 0.01% /°C
-3 dB
-231°
-0.20 dB
3.01 dB
30.0 dB
40.0 dB
0 - 0.8 f
c
± 2% max.
4-Pole, Chebychev,
0.5 dB Ripple
4.0” x 2.0” x 0.6”
4.0” x 2.0” x 0.4”
0.1 Hz to 102.4 kHz
Appendix A
Page 15
0.05 dB
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
24 dB/octave
f
c
± 0.01% /°C
-3 dB
-245°
-0.43 dB
3.01 dB
30.0 dB
40.0 dB
0 - 0.8 f
c
0.8 f
c
- 1.0 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
2.37 f
c
3.16 f
c
0.80 f
c
1.00 f
c
3.50 f
c
4.72 f
c
± 2° max.
± 1° typ.
0.80 f
c
1.00 f
c
1.89 f
c
2.46 f
c
0.80 f
c
1.00 f
c
1.80 f
c
2.33 f
c
± 2° max.
± 1° typ.
± 3° max.
± 1.5° typ.
± 0.2 dB max.
± 0.1 dB typ.
± 0.3 dB max.
± 0.15 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
c
- 1.0 f
c
± 3° max.
± 1.5° 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.
< - 88 dB typ.
200
mVrms
typ.
50
mVrms
typ.
0 - 0.8 f
c
Amplitude Accuracy
(theoretical)
0 - f
c
± 0.2 dB max.
± 0.1 dB typ.
Total Harmonic
Distortion @ 1 kHz
Wide Band Noise
(5 Hz - 2 MHz)
< - 100 dB typ.
200
mVrms
typ.
50
mVrms
typ.
< - 100 dB typ.
200
mVrms
typ.
50
mVrms
typ.
< - 88 dB typ.
200
mVrms
typ.
50
mVrms
typ.
Narrow Band Noise
(5 Hz - 100 kHz)
Filter Mounting
Assembly
FMA-03A
FMA-03A
FMA-03A
FMA-03A
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
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
854 Series
8-Bit Programmable
Model
Product Specifications
Transfer Function
Size, Model 1 & 2
Model 3 thru 6
Range f
c
Theoretical Transfer
Characteristics
Passband Ripple
(theoretical)
4-Pole
High-Pass Filters
854H8Y2
854H8Y5
854H8B
4-Pole,
Butterworth
4.0” x 2.0” x 0.6”
4.0” x 2.0” x 0.4”
0.1 Hz to 102.4 kHz
Appendix A
Page 27
0.0 dB
0 ± 0.2 dB to 100 kHz
0 ± 0.5 dB to 120 kHz
120 kHz
(-6 dB) 1 MHz
24 dB/octave
f
c
± 0.01% /°C
-3 dB
-180°
40 dB
30 dB
3.01 dB
0.02 dB
± 2% max.
4-Pole, Chebychev,
0.2 dB Ripple
4.0” x 2.0” x 0.6”
4.0” x 2.0” x 0.4”
0.1 Hz to 102.4 kHz
Appendix A
Page 31
0.20 dB
0 ± 0.2 dB to 100 kHz
0 ± 0.5 dB to 120 kHz
120 kHz
(-6 dB) 1 MHz
24 dB/octave
f
c
± 0.01% /°C
-3 dB
-231°
40.0 dB
30.0 dB
3.01 dB
-0.07 dB
± 2% max.
4-Pole, Chebychev,
0.5 dB Ripple
4.0” x 2.0” x 0.6”
4.0” x 2.0” x 0.4”
0.1 Hz to 102.4 kHz
Appendix A
Page 33
0.50 dB
0 ± 0.2 dB to 100 kHz
0 ± 0.5 dB to 120 kHz
120 kHz
(-6 dB) 1 MHz
24 dB/octave
f
c
± 0.01% /°C
-3 dB
-245°
40.0 dB
30.0 dB
3.01 dB
-0.25 dB
± 2% max.
Voltage Gain
(non-inverting)
Power Bandwidth
Small Signal Bandwidth
Stopband
Attenuation Rate
Cutoff Frequency
Stability
Amplitude
Phase
Filter Attenuation
(theoretical)
0.31 f
c
0.42 f
c
1.00 f
c
2.00 f
c
0.41 f
c
0.53 f
c
1.00 f
c
2.00 f
c
0.43 f
c
0.56 f
c
1.00 f
c
2.00 f
c
Phase Match
1
f
c
- 100 kHz ± 3° max.
± 1.5° typ.
f
c
- 100 kHz ± 3° max.
± 1.5° typ.
f
c
- 100 kHz ± 3° max.
± 1.5° typ.
Amplitude Accuracy
(theoretical)
1.00 - 1.25 f
c
± 0.3 dB max.
± 0.15 dB typ.
1.25 f
c
-100 kHz± 0.2 dB max.
± 0.1 dB typ.
< - 100 dB typ.
400
mVrms
typ.
100
mVrms
typ.
1.00 - 1.25 f
c
± 0.3 dB max.
± 0.15 dB typ.
1.25 f
c
-100 kHz ± 0.2 dB max.
± 0.1 dB typ.
< - 88 dB typ.
400
mVrms
typ.
100
mVrms
typ.
1.00 - 1.25 f
c
± 0.3 dB max.
± 0.15 dB typ.
1.25 f
c
-100 kHz± 0.2 dB max.
± 0.1 dB typ.
< - 88 dB typ.
400
mVrms
typ.
100
mVrms
typ.
Total Harmonic
Distortion @ 1 kHz
Wide Band Noise
Narrow Band Noise
(5 Hz - 100 kHz)
Filter Mounting
Assembly
FMA-03A
FMA-03A
FMA-03A
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
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
854 Series
Specification
(25°C and Vs ± 15 Vdc)
Analog Input Characteristics
1
Impedance
Voltage Range
Max. Safe Voltage
Analog Output Characteristics
Impedance (Closed Loop)
Linear Operating Range
Maximum Current
2
Offset Voltage
3
Offset Temp. Coeff.
Power Supply (
±
V)
Rated Voltage
Operating Range
Maximum Safe Voltage
Quiescent Current
4-Pole
Temperature
Operating
Storage
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 without offset pin connected.
Pin-Out and Package Data
Ordering Information
Pin-Out & Package Data
4.00
10 k
W
min.
±
10 Vpeak
±
Vs
0.6
M-2
0.4
11
W
typ.
10
W
max.
±
10V
±
2 mA
22
mV typ.
20 mV max.
50
mV/°C
M-1
Side View
0.2 min
0.04 Dia.
OUT +Vs -Vs
D
7
D
6
D
5
D
4
2.00
GND
D
3
D
2
D
1
D
0
4
IN Os
±
15 Vdc
±
12 to
±
18 Vdc
±
18 Vdc
±
13 mA typ.
±
20 mA max.
-20
to +70°C
-25 to +85°C
Bottom View
P C
Filter Mounting Assembly-See FMA-03A
Ordering Information
Filter Type
L
- Low Pass
H
- High Pass
Transfer Function
B
- Butterworth
L
- Bessel
Y2
- Chebychev (0.2 dB Ripple)
Y5
- Chebychev (0.2 dB Ripple)
DC Offset Adjustment
± Vs
Do not connect
if trim is not
required.
20 k
W
(Cermet)
OS
854L8B-3
Model Number
e.g.,
Model
- Vs
Number
1
2
3
4
5
6
Tuning
Range (Hz)
0.1 to 25.6
1.0 to 256
10 to 2560
100 to 25.6k
200 to 51.2k
400 to 102.4k
Minimum
Step(Hz)
0.1
1.0
10
100
200
400
Case
M-2
M-2
M-1
M-1
M-1
M-1
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-00854-01
5
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
