Filters > D68

D68 & DP68 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

D68 & DP68 Series
Fixed Frequency
8-Pole
Low-Pass Filters
 

 

Purchase

 

 

Description

The D68 and DP68 Series of small 8-pole fixed-frequency, precision active filters provide high performance linear active filtering in a compact 32-pin DIP package, with a broad range of corner frequencies and a choice of transfer functions. Individual D68 filters can serve in low-pass or high-pass applications (DP68, low-pass only) or be combined to create custom band-pass or band-reject filters. These fully self-contained units require no external components or adjustments. Each model comes factory tuned to a user-specified corner frequency between 1 Hz and 100 kHz (DP68, 1 Hz to 5 kHz) and operate with low total harmonic distortion over a wide dynamic input voltage range from non-critical +/-5V to +/-18V power supplies.

Features/Benefits:

  • Low harmonic distortion and wide signal–to–noise ratio to 16 bit resolution
  • Compact 1.8"L x 0.8"W x 0.3"H 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 transfer characteristics and corner frequencies to meet a wide range of applications

 

Available High-Pass Models:

D68H8B
8-pole Butterworth
D68H8E
8-pole, 6 zero elliptic, 1.77 (-80dB)
D68H8EX
8-pole, 6 zero elliptic, 1.56 (-80dB)
D68H8EY
8-pole, 6 zero elliptic, 2.00 (-100dB)
 

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
  • Acoustic and vibration analysis and control
  • Noise elimination
  • Signal reconstruction

Available Low-Pass Models:

D68L8B & DP68L8B
8-pole Butterworth
D68L8E & DP68L8E
8-pole, 6 zero elliptic, 1.77 (-80dB)
D68L8EX & DP68L8EX
8-pole, 6 zero elliptic, 1.56 (-80dB)
D68L8EY & DP68L8EY
8-pole, 6 zero elliptic, 2.00 (-100dB)
D68L8L & DP68L8L
8-pole Bessel
D68L8D60 & DP68L8D60
8-pole constant delay (-60 dB)
D68L8D & DP68L8D
8-pole constant delay (-80dB)
D68L8D10 & DP68L8D10
8-pole constant delay (-100dB)


Fixed Frequency
8-Pole
Low-Pass Filters

Model D68L8B & DP68L8B D68L8E & DP68L8E D68L8EX & DP68L8EX D68L8EY & DP68L8EY
Product Specifications
Transfer Function


Size

Range fc, fr
   D68
   DP68

8-Pole
Butterworth

1.8” x 0.8” x 0.3”


1 Hz to 100 kHz
1 Hz to 5 kHz

8-Pole, 6 zero
Elliptic

1.8” x 0.8” x 0.3”


1 Hz to 100 kHz
1 Hz to 5 kHz

8-Pole, 6 zero
Elliptic

1.8” x 0.8” x 0.3”


1 Hz to 100 kHz
1 Hz to 5 kHz

8-Pole, 6 zero
Elliptic

1.8” x 0.8” x 0.3”


1 Hz to 100 kHz
1 Hz to 5 kHz

Theoretical Transfer
Characteristics
Click to view
Click to view
Click to view
Click to view
Passband Ripple
   (theoretical)
0.0 dB  ± 0.035 dB  -0.05 dB  -0.05 dB
DC Voltage Gain
   
(non-inverting)
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
Stopband
Attenuation Rate
48 dB/octave 80 dB min. 80 dB min. 100 dB min.
Cutoff Frequency
Stability
Amplitude
Phase
fc         ± 1% max.
± 0.01% /°c
-3 dB
-360°
fr         ± 1% max.
± 0.01% /°c
-0.035 dB
-323.5°
fr         ± 1% max.
± 0.01% /°c
-0.05 dB
-414°
fr         ± 2% max.
± 0.01% /°c
-0.05 dB
-419°
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
0.035 dB     1.00 fr
3.01 dB       1.13 fr
60.0 dB       1.67 fr
80.0 dB       1.77 fr
0.05 dB       1.00 fr
3.01 dB       1.05 fr
60.0 dB       1.45 fr
80.0 dB       1.56 fr
0.05 dB       1.00 fr
3.01 dB       1.06 fr
80.0 dB       1.83 fr
100.0 dB     2.00 fr
Phase Match1
0 - 0.8 fc
± 2° max.
± 1° typ.
0.8 fc - 1.0 fc
± 3° max.
± 1.5° typ.
0 - 0.8 fr
± 2° max.
± 1° typ.
0.8 fr - 1.0 fr
± 4° max.
± 2° typ.
0 - 0.8 fr
± 3° max.
± 1.5° typ.
0.8 fr - 1.0 fr
± 4° max.
± 2° typ.
0 - 0.8 fr
± 3° max.
± 1.5° typ.
0.8 fr - 1.0 fr
± 4° max.
± 2° typ.
Amplitude Accuracy
   
(theoretical)
0 - 0.8 fc
± 0.2 dB max.
± 0.1 dB typ.
0.8 fc - 1.0 fc
± 0.3 dB max.
± 0.15 dB typ.
0 - 0.8 fr
± 0.2 dB max.
± 0.1 dB typ.
0.8 fr - 1.0 fr
± 0.3 dB max.
± 0.15 dB typ.
0 - 0.8 fr
± 0.2 dB max.
± 0.1 dB typ.
0.8 fr - 1.0 fr
± 0.5 dB max.
± 0.25 dB typ.
0 - 0.8 fr
± 0.2 dB max.
± 0.1 dB typ.
0.8 fr - 1.0 fr
± 0.5 dB max.
± 0.25 dB typ.
Total Harmonic
Distortion @ 1 kHz
   D68
   DP 68
< - 100 dB typ.
< - 80 dB typ.
< - 88 dB typ.
< - 80 dB typ.
< - 88 dB typ.
< - 80 dB typ.
< - 88 dB typ.
< - 80 dB typ.
Wide Band Noise
   
(5 Hz - 2 MHz)
200 µVrms typ. 200 µVrms typ. 250 µVrms typ. 250 µVrms typ.
Narrow Band Noise
(20 Hz - 100 kHz)
50 µVrms typ. 50 µVrms typ. 75 µVrms typ. 75 µVrms typ.
Filter Mounting
Assembly
FMA-01S FMA-01S FMA-01S FMA-01S
 

1. Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot


Fixed Frequency
8-Pole
Low-Pass Filters
Model D68L8L & DP68L8 D68L8D60 & DP68L8D60 D68L8D & DP68L8D D68L8D10 & DP68L8D10
Product Specifications
Transfer Function


Size

Range fc
   D68
   DP68

8-Pole
Bessel

1.8” x 0.8” x 0.3”


1 Hz to 100 kHz
1 Hz to 5 kHz

8-Pole, 6 zero
Constant Delay

1.8” x 0.8” x 0.3”


1 Hz to 100 kHz
1 Hz to 5 kHz

8-Pole, 6 zero
Constant Delay

1.8” x 0.8” x 0.3”


1 Hz to 100 kHz
1 Hz to 5 kHz

8-Pole, 6 zero
Constant Delay

1.8” x 0.8” x 0.3”


1 Hz to 100 kHz
1 Hz to 5 kHz

Theoretical Transfer
Characteristics
Click to view
Click to view
Click to view
Click to view
Passband Ripple
   (theoretical)
0.0 dB 0.15 dB 0.15 dB 0.15 dB
DC Voltage Gain
   
(non-inverting)
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
0 ± 0.1 dB max.
0 ± 0.05 dB typ.
Stopband
Attenuation Rate
48 dB/octave 60 dB min. 80 dB min. 100 dB min.
Cutoff Frequency
Stability
Amplitude
Phase
fc        ± 1% max.
± 0.01% /°c
-3 dB
-182°
fc        ± 1% max.
± 0.01% /°c
-3 dB
-306°
fc        ± 1% max.
± 0.01% /°c
-3 dB
-306°
fc        ± 2% max.
± 0.01% /°c
-3 dB
-311°
Filter Attenuation
   
(theoretical)
1.91 dB       0.80 fc
3.01 dB       1.00 fc
60.0 dB       4.52 fc
80.0 dB       6.07 fc
3.01 dB      1.00 fc
40.0 dB       2.28 fc
60.0 dB       2.64 fc
3.01 dB       1.00 fc
60.0 dB       3.08 fc
80.0 dB       3.57 fc
3.01 dB       1.00 fc
80.0 dB       4.45 fc
100.0 dB     5.20 fc
Phase Match1
0 - fc
± 2° max.
± 1° typ.
0 - fc
± 2° max.
± 1° typ.
0 - fc
± 2° max.
± 1° typ.
0 - fc
± 2° max.
± 1° typ.
Amplitude Accuracy
   
(theoretical)
0 - fc
± 0.2 dB max.
± 0.1 dB typ.
0 - 0.8 fc
± 0.2 dB max.
± 0.1 dB typ.
0.8 fc - 1.0 fc
± 0.3 dB max.
± 0.15 dB typ.
0 - 0.8 fc
± 0.2 dB max.
± 0.1 dB typ.
0.8 fc - 1.0 fc
± 0.3 dB max.
± 0.15 dB typ.
0 - 0.8 fc
± 0.2 dB max.
± 0.1 dB typ.
0.8 fc - 1.0 fc
± 0.3 dB max.
± 0.15 dB typ.
Total Harmonic
Distortion @ 1 kHz
   D68
   DP 68
< - 100 dB typ.
< - 80 dB typ.
< - 100 dB typ.
< - 80 dB typ.
< - 100 dB typ.
< - 80 dB typ.
< - 100 dB typ.
< - 80 dB typ.
Wide Band Noise
   
(5 Hz - 2 MHz)
200 µVrms typ. 200 µVrms typ. 200 µVrms typ. 200 µVrms typ.
Narrow Band Noise
(5 Hz - 100 kHz)
50 µVrms typ. 50 µVrms typ. 50 µVrms typ. 50 µVrms typ.
Filter Mounting
Assembly
FMA-01S FMA-01S FMA-01S FMA-01S
 

1. Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot


Fixed Frequency
8-Pole
High-Pass Filters

Model D68H8B D68H8E D68H8EX D68H8EY
Product Specifications
Transfer Function


Size

Range fc, fr
   D68
   DP68

8-Pole
Butterworth

1.8” x 0.8” x 0.3”


1 Hz to 100 kHz
Not Available

8-Pole, 6 zero
Elliptic

1.8” x 0.8” x 0.3”


1 Hz to 100 kHz
Not Available

8-Pole, 6 zero
Elliptic

1.8” x 0.8” x 0.3”


1 Hz to 100 kHz
Not Available

8-Pole, 6 zero
Elliptic

1.8” x 0.8” x 0.3”


1 Hz to 100 kHz
Not Available

Theoretical Transfer
Characteristics
Click to view
Click to view
Click to view
Click to view
Passband Ripple
   (theoretical)
0.0 dB ± 0.035 dB -0.05 dB -0.05 dB
Voltage Gain
   
(non-inverting)
0 ± 0.2 dB to 100 kHz
0 ± 0.5 dB to 120 kHz
0 ± 0.2 dB to 100 kHz
0 ± 0.5 dB to 120 kHz
0 ± 0.2 dB to 100 kHz
0 ± 0.5 dB to 120 kHz
0 ± 0.2 dB to 100 kHz
0 ± 0.5 dB to 120 kHz
Power Bandwidth 120 kHz 120 kHz 120 kHz 120 kHz
Small Signal
Bandwidth
(-6 dB) 1 MHz (-6 dB) 1 MHz (-6 dB) 1 MHz (-6 dB) 1 MHz
Stopband
Attenuation Rate
48 dB/octave 80 dB 80 dB 100 dB
Cutoff Frequency
Stability
Amplitude
Phase
fc        ± 1% max.
± 0.01% /°c
-3 dB
-360°
fr        ± 1% max.
± 0.01% /°c
-0.035 dB
-323.5°
fr        ± 1% max.
± 0.01% /°c
-0.05 dB
-414°
fr        ± 2% max.
± 0.01% /°c
-0.05 dB
-419°
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
80.0 dB       0.56 fr
60.0 dB       0.60 fr
3.01 dB       0.88 fr
0.03 dB       1.00 fr
0.00 dB       2.00 fr
80.0 dB       0.64 fr
60.0 dB       0.69 fr
3.01 dB       0.95 fr
0.05 dB       1.00 fr
0.00 dB       2.00 fr
100 dB        0.50 fr
80.0 dB       0.55 fr
3.01 dB       0.94 fr
0.03 dB       1.00 fr
0.00 dB       2.00 fr
Phase Match1
fc - 100 kHz
± 3° max.
± 1.5° typ.
fr - 1.25 fr
± 4° max.
± 2° typ.
1.25 fr-100 kHz
± 2° max.
± 1° typ.
fr - 1.25 fr
± 4° max.
± 2° typ.
1.25 fr-100 kHz
± 2° max.
± 1° typ.
fr - 1.25 fr
± 4° max.
± 2° typ.
1.25 fr-100 kHz
± 3° max.
± 1.5° typ.
Amplitude Accuracy
   
(theoretical)
1.0 - 1.25 fc
± 0.3 dB max.
± 0.15 dB typ.
1.25 fc-100kHz
± 0.2 dB max.
± 0.1 dB typ.
1.00 - 1.25 fr
± 0.3 dB max.
± 0.15 dB typ.
1.25 fr-100kHz
± 0.2 dB max.
± 0.1 dB typ.
1.00 - 1.25 fr
± 0.5 dB max.
± 0.25 dB typ.
1.25 fr-100kHz
± 0.2 dB max.
± 0.1 dB typ.
1.00 - 1.25 fr
± 0.5 dB max.
± 0.25 dB typ.
1.25 fr-100kHz
± 0.2 dB max.
± 0.1 dB typ.
Total Harmonic
Distortion @ 1 kHz
   D68
   
< - 88 dB typ. < - 88 dB typ. < - 88 dB typ. < - 88 dB typ.
Wide Band Noise
   
(5 Hz - 2 MHz)
400 µVrms typ. 400 µVrms typ. 500 µVrms typ. 500 µVrms typ.
Narrow Band Noise
(20 Hz - 100 kHz)
100 µVrms typ. 100 µVrms typ. 150 µVrms typ. 150 µVrms typ.
Filter Mounting
Assembly
FMA-01S FMA-01S FMA-01S FMA-01S
 

1. Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot


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 Ω typ., 10 Ω max.
  • Linear Operating Range: ± 10 V
  • Maximum Current2: ± 2 mA
  • Offset Voltage3:
    2 mV typ., 20 mV max.
    Offset Temp. Coeff.: 50 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. Adjustable to zero.
  4. Units operate with or without offset pin connected.
  5. 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:
    D68: ± 25 mA typ., ± 40 mA max.
    DP68: ± 7 mA typ. ± 10 mA max.

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