Filters > D64BP


1 Hz to 100 kHz
32 Pin DIP


Pin-out and package data

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D64BP Series
Fixed Frequency
2-Pole Pair
Band-Pass Filters






The D64BP Series of small 2-pole-pair fixed-frequency, precision band-pass active filter that provides high performance in a compact 32-pin DIP package, with a broad range of fixed center frequencies (fo) from 1 Hz to 100 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 fixed, user specified center frequency, band-pass D64BP filters pass all frequencies lying between the upper and lower -3dB points of the amplitude response curve. Available Q’s for D64BP models are 1, 2, 5, or 10.


  • 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


  • Power line interference rejection
  • Transducer output filtering
  • Production test instrumentation
  • Medical electronics equipment and research
  • Comb filtering and equalization
  • Noise and harmonic analysis
  • RMS measurements
  • Frequency spectrum analysis

Available Band-Pass Models:

D64BP2 2 Pole Pair

D64BP Series
Fixed Frequency
2-Pole Pair Filters
Model D64BP2
Product Specifications

Range fo

Available "Q’s"1

Q Accuracy

1.8" x 0.8" x 0.3"

1 Hz to 100 kHz

1, 2, 5, 10


Theoretical Transfer
Click to view
Pass-Band Gain
0± 0.2 dB typ.
0± 0.4 dB max.
Attenuation Rate 12 dB/octave
Center Frequency fo     ±2% max.
Stability ±0.01%/°C
Filter Mounting

Notes 1: Q – Quality Factor for band-pass filters. Q = fo / (fH - fL)

fo=sq.rt.(fH x fL)


(@ 25°C and Vs ±15 Vdc)

Analog Input Characteristics 1
  • 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


  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 Center Frequency:
    Centwer frequencies are specified by attaching a three digit frequency designator to the basic model number. Center frequencies can range from 1 Hz to 100 kHz.
Power Supply (+/-Vs)
  • Rated Voltage: ± 15 Vdc
  • Operating Range: ± 5 to ± 18 Vdc
  • Maximum Safe Voltage: ± 18 Vdc
  • Quiescent Current:
    ± 12.5 mA typ., ± 20 mA max.


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

Pin-Out and Package Data

Ordering Information

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Frequency Devices, Inc.
Your engineering partner for signal conditioning
  927 Fosse Rd
Ottawa, IL 61350



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