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: Input and output signal voltage referenced to supply common. Output is short circuit protected to common. DO NOT CONNECT TO +/-Vs. 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.