Filters > D78

D78 & DP78 Series

1.0 Hz to 100 kHZ
32-Pin DIP
Footprint

Specifications

Pin-out and package data

Ordering Information


Download PDF File

Download Adobe Acrobat Reader
Download Acrobat Reader

D78 & DP78 Series
Fixed Frequency
8-Pole Filters
 

 

Purchase

 

 

Description

The D78 and DP78 Series of low-power, fixed-frequency, linear active filters are high performance, 8-pole filters in a compact package. These Butterworth and Bessel low-pass and Butterworth high-pass filters (D78 only) combine linear active filter design with the space savings of a 32-pin dual in-line package (DIP). Each model comes factory tuned to a user-specified corner frequency between 1.00 Hz and 100 kHz (DP78, 1.00 Hz to 5.00kHz). These fully self-contained units require no external components or adjustments and operate with dynamic input voltage range from non-critical ±5V to ±18V power supplies.

Features/Benefits:

  • Low cost solution for low frequency signal conditioning
  • Compact DIP design minimizes board space requirements
  • Plug-in ready-to-use, reducing engineering design and manufacturing time
  • Factory tuned, no external clocks or adjustments needed saving time and labor of other discrete assembly solutions
  • Low harmonic distortion and wide signal-to-noise ratio to 12 bit resolution

 

Available High-Pass Models:

D78H8B 8-pole Butterworth
 

Applications

  • Anti-alias filtering
  • Vibration & shock analysis
  • Automatic test equipment
  • Aerospace, navigation and sonar
  • Communication systems
  • Medical electronics
  • Sound and vibration testing
  • Noise elimination
  • Process control

Available Low-Pass Models:

D78L8B 8-pole Butterworth
DP78L8B 8-pole Butterworth
(Low Power)
D78L8L 8-pole Bessel
DP78L8L 8-pole Bessel
(Low Power)
 


Fixed Frequency
8-Pole
Low-Pass and High-Pass Filters
Model D78L8B & DP78L8B D78L8L & DP78L8L   Model D78H8B
Product Specifications
 
Low-Pass
 
High-Pass
Transfer Function

Size
   D78   
1.00 Hz to 1.00 kHz
   D78   
1.01 kHz to 100 kHz
   DP78 
1.00 Hz to 5.00 kHz

Range fc
   D78
   DP78
8-Pole, Butterworth


1.8” x 0.8” x 0.5”
1.8” x 0.8” x 0.3”
1.8” x 0.8” x 0.5”


1 Hz to 100 kHz
1 Hz to 5 kHz

8-Pole, Bessel


1.8” x 0.8” x 0.5”
1.8” x 0.8” x 0.3”
1.8” x 0.8” x 0.5”


1 Hz to 100 kHz
1 Hz to 5 kHz

  Transfer Function

Size
   D78  
1.00 Hz to 1.00 kHz
   D78  
1.01 kHz to 100 kHz

Range fc
   D78
8-Pole, Butterworth


1.8” x 0.8” x 0.5”
1.8” x 0.8” x 0.3”



1 Hz to 100 kHz
Theoretical Transfer
Characteristics
Click to view
Click to view
  Theoretical Transfer
Characteristics
Click to view
Passband Ripple
   (theoretical)
0.0 dB 0.0 dB   Passband Ripple
   (theoretical)
0.0 dB
DC Voltage Gain
   
(non-inverting)
0 ± 0.1 dB typ. 0 ± 0.1 dB typ.   Voltage Gain
   
(non-inverting)
0 ± 0.1 dB to 100 kHz
Stopband
Attenuation Rate
48 dB/octave 48 dB/octave   Stopband
Attenuation Rate
48 dB/octave
        Power Bandwidth 120 kHz
        Small Signal Bandwidth (-6 dB) 1 MHz
Cutoff Frequency
Stability
Amplitude
Phase
fc          ± 2% max.
± 0.03% /°c
-3 dB
-360°
fc          ± 2% max.
± 0.03% /°c
-3 dB
-182°
  Cutoff Frequency
Stability
Amplitude
Phase
fc          ± 2% max.
± 0.03% /°c
-3 dB
-360°
Filter Attenuation
   
(theoretical)
0.12 dB       0.80 fc
3.01 dB       1.00 fc
60.0 dB       2.37 fc
80.0 dB       3.16 fc
1.91 dB       0.80 fc
3.01 dB       1.00 fc
60.0 dB       4.52 fc
80.0 dB       6.07 fc
  Filter Attenuation
   
(theoretical)
80.0 dB       0.31 fc
60.0 dB       0.42 fc
3.01 dB       1.00 fc
0.00 dB       2.00 fc
Total Harmonic
Distortion @ 1 kHz
   D78
   DP78
< - 70 dB
< - 70 dB
< - 70 dB
< - 70 dB
  Total Harmonic
Distortion @ 1 kHz
   D78   
< - 70 dB
Wide Band Noise
   
(5 Hz - 2 MHz)
200 µVrms typ. 200 µVrms typ.   Wide Band Noise
   
(5 Hz - 2 MHz)
400 µVrms typ.
Narrow Band Noise
  
(20 Hz - 100 kHz)
50 µVrms typ. 50 µVrms typ.   Narrow Band Noise
  
(20 Hz - 100 kHz)
100 µVrms typ.
Filter Mounting
Assembly
FMA-01S FMA-01S   Filter Mounting
Assembly
FMA-01S


Specifications

(@ 25°C and Vs ±15 Vdc)

Analog Input Characteristics1
  • Impedance: 10 kΩ min.
  • Voltage Range: ± 10 Vpeak
  • Max. Safe Voltage: ± Vs

Analog Output Characteristics

  • Impedance(Closed Loop): 1 W
  • Linear Operating Range: ± 10 V
  • Maximum Current2:
      D78 ± 10 mA

      DP78 ± 5 mA
  • Offset Voltage:
    3 mV typ., 20 mV max.
  • Offset Temp. Coeff.: 20 µV / °C

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. How to Specify Corner Frequency:
    Corner frequencies are specified by attaching a three digit frequency designator to the basic model number. Corner frequencies can range from 1.00 Hz to 100 kHz.
Power Supply (+/-V)
  • Rated Voltage: ± 15 Vdc
  • Operating Range: ± 5 to ± 18 Vdc
  • Maximum Safe Voltage: ± 18 Vdc
  • Quiescent Current D78:
    12 mA max., 8 mA typ.
  • Quiescent Current DP78:
    3.0 mA max., 1.5 mA typ.

Temperature

  • Operating: 0 to + 70°C
  • Storage: -25 to+85°C


Pin-Out and Package Data

Filter Mounting Assembly-See FMA-01S


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.


Frequency Devices, Inc.
Your engineering partner for signal conditioning
  1784 Chessie Lane
Ottawa, IL 61350

Fax: (815) 434-8176
e-mail: sales@freqdev.com

 

Phone: (815) 434-7800
or (800) 252-7074 (U.S. only)

Copyright © 2001-2014 Frequency Devices
All Rights Reserved