Filters > D100B
Low Pass D100L

D100B Series

Fixed Frequency
Low Noise
100 Hz to 100 kHz


Pin-out and package data

Ordering Information

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D100B Series
2 - Pole Pair Band - Pass Filters






The D100B Series are low noise and distortion 2-pole-pair, fixed center frequency (fo) band-pass filters. These filters feature near theoretical low noise and distortion performance, by providing up to -120 dB noise floors (20-Bit). D100B's take advantage of FDI’s design expertise utilizing high performance amplifiers and surface-mount technology to provide design engineers with precision signal conditioning solutions in a compact package. These fully self-contained units require no external components or adjustments. Each D100B comes factory tuned to a user specified corner frequency between 100 Hz to 100 kHz. Available Q's for D100B models are 1, 2 or 5 and operate with low harmonic distortion over an input voltage range to ±10 V.


  • Small 32-pin DIP (1.8"L x 0.8"W) footprint 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 center frequencies to meet a wide range of applications.




  • Transducer output filtering:
  • Production test instrumentation
  • Medical electronics equipment and research
  • Noise and harmonic analysis
  • Frequency spectrum analysis

Available Band-Pass Models:

2-Pole Pair

100 Hz to 100 kHz
Low Noise
D100B Series
Fixed Frequency
2 - Pole Pair
Band-Pass Filters

Model D100BP2
Product Specifications

Range fo

1.8" x 0.8" x 0.3"

100 Hz to 100 kHz

Available “Q’s” 1 1, 2 or 5
“Q” Accuracy ± 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             ± 1% max.
± 0.01% /°C
Total Harmonic
Distortion @
Fc <=100 Hz
Fc <=20 kHz
Fc <=100 kHz
<-120 dB max.
<-117 dB max.
<-100 dB max.
Narrow Band Noise
(100 kHz BW @ 20Vp-p)
Fc <=100 Hz
Fc <=20 kHz
Fc <=100 kHz

7.0 typ., 12 max.
22 typ., 40 max.
70 typ., 100 max.

Filter Mounting
1. Q - Quality Factor for band-pass and band-reject filters. Q = fO/(fH-fL),
fo = sq.rt.(fH x fL) = (fH x fL)1/2
2. Use I/O jumpers to bypass input and output buffers, for low noise operation. With FMA, D100B distortion specs at 50k to 100kHz may degrade slightly.


(@ 25°C and Vs ± 5 Vdc)

Analog Input Characteristics 1
Impedance: 1.0 kΩ min.
Voltage Range: ± 10 Vpeak
Max. SafeVoltage: ± Vs

Analog Output Characteristics

Load impedance 1.0 kΩ min.
Linear Operating Range for THD ± 5V
Operating Range for low Noise ± 10V
Current 2 @ (Vs @ ± 15V) 10 mA max.
Offset Voltage 3 2 mV typ.
20 mV max.
Offset Temp. Coefficient 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.
Power Supply (± Vs)
Rated Voltage ± 15 V
Operating Range ± 5 V min.
± 18 V max.
Quiescent Current
40 mA max.

Temperature Range

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


Pin-Out and Package Data

Ordering Information


How to specify Center Frequency F0. Center frequency is specified by attaching a three-digit frequency designator to the basic model number. Center frequencies can range from 100 Hz to 100 kHz.

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
  927 Fosse Rd
Ottawa, IL 61350



Phone: (815) 434-7800

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