Filters > D101H

D101H Series

Fixed Frequency
Low Noise
1.0 kHz to 500 kHz


Pin-out and package data

Ordering Information

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D101H Series
4- and 8- Pole High-Pass Filters


U.S. Selling Price (1-9) D101H4 ... $320.00 ea.
D101H8 ... $490.00 ea.
Orders for Export U.S. Selling Price + 20%
Minimum Order Value $150.00 F.O.B. Ottawa, IL
Lead-Time: 2 weeks A.R.O. Accept Visa, Mcard, Amex
(No Longer Available)
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D101H Series are low noise 4- and 8-pole, Butterworth fixed frequency high-pass filters. These filters feature near theoretical low noise performance, by providing typically -110 dB noise floors (19-Bit). D101H’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 D101H comes factory tuned to a user specified corner frequency between 1.0 kHz to 500 kHz and operate 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 corner 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 High-Pass Models:

4-pole Butterworth
8-pole Butterworth

1.0 kHz to 500 kHz
Low Noise
D101H Series
Fixed Frequency
4- and 8- Pole
High-Pass Filters

Model D101H4B D101H8B
Product Specifications
Transfer Function


Range fc


1.8" x 0.8" x 0.3"

1.0 kHz to 500 kHz


1.8" x 0.8" x 0.3"

1.0 kHz to 500 kHz

Theoretical Transfer
Click to view
Click to view
Passband Ripple
0.0 dB 0.0 dB
DC Voltage Gain @ 5MHz
5 Vpeak 
0 ± 0.2 dB typ.
0 ± 0.4 dB max.
0 ± 0.2 dB typ.
0 ± 0.4 dB max.
Attenuation Rate
24 dB/octave 48 dB/octave
Cutoff Frequency
fc             ± 1% max.
± 0.01% /°C
- 3 dB
fc             ± 1% max.
± 0.01% /°C
- 3 dB
Filter Attenuation
40 dB        0.31 fc
30 dB        0.42 fc
3.01 dB       1.00 fc
0.02 dB       2.00 fc
80 dB         0.31 fc
60 dB         0.42 fc
3.01 dB       1.00 fc
0.00 dB       2.00 fc
Power Bandwidth 5 MHz max 5 MHz max
Wide Band Noise
To 10 MHz
< 130 µVrms < 130 µVrms
Noise Density
(Out of Band)
< 50 nV/ < 50 nV/
Narrow Band Noise
(@Fc & 10Vp-p)
< 300 nV/
< 300 nV/
Filter Mounting
1. Use I/O jumpers to bypass input and output buffers, for low noise operation. With FMA-01S, D101H distortion specs above 100kHz will degrade.


(@ 25°C and Vs ± 5 Vdc)

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

Analog Output Characteristics

Load impedance 2 k min.
Linear Operating Range for THD ± 5V
Operating Range for low Noise ± 10V
Current 2 @ (Vs @ ± 15V) 5.0 mA max.
Offset Voltage 10 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.
Power Supply (± Vs)
Rated Voltage ± 15 V
Operating Range ± 5 V min.
± 18 V max.
Quiescent Current
20 mA typ.
30 mA max.
40 mA typ.
60 mA max.

Temperature Range

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

Pin-Out and Package Data

Ordering Information


How to specify Corner Frequency. Corner frequency is specified by attaching a three-digit frequency designator to the basic model number. Corner frequencies can range from 1.0 kHz to 500 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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