Description The D68BP and D68BR Series of small 4-pole-pair fixed-frequency, precision band-pass and band-reject (notch) active filters provide 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 D68BP filters pass all frequencies lying between the upper and lower -3 dB points of the amplitude response curve, while D68BR band-reject (notch) filters sharply attenuate those frequencies that are bound and defined by the bottom of the notch. Available Q's for D68BP models are 1, 2, 5, or 10 and D68BR filters are 3 or 10. Features/Benefits: Compact 32-pin 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 transfer characteristics and corner frequencies to meet a wide range of applications   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: D68BP4 4-pole pair Available Band-Reject Models: D68BR4 4-pole pair Band-Pass & Band-Reject D68BP & D68BR Series Fixed Frequency 4-Pole Pair Filters Model D68BP4   Model D68BR4 Product Specifications   Band-Pass   Band-Reject Size 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 ±10%   Size Range fo Available "Q’s"1 Q Accuracy 1.8" x 0.8" x 0.3" 1 Hz to 100 kHz 3, 10 ±10% Theoretical Transfer Characteristics Click to view    Theoretical Transfer Characteristics Click to view       Notch Attenuation 45 db typ. Pass-Band Gain    (non-inverting) 0± 0.2 dB typ. 0± 0.4 dB max.   Pass-Band Gain    (non-inverting) 0± 0.2 dB typ. 0± 0.4 dB max. Attenuation Rate 24 dB/octave   Attenuation Rate 24 dB/octave Center Frequency fo     ±2% max.   Center Frequency fo     ±2% max. Stability ±0.01%/°C   Stability ±0.01%/°C Filter Mounting Assembly FMA-01S   Filter Mounting Assembly FMA-01S Notes: 1 Q – Quality Factor for band-pass and band-reject filters. Q = fo / (fH - fL) fo=sq.rt(fH xX fL) Specifications (@ 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 Current(2): ± 2 mA Offset Voltage(3): 2 mV typ., 20 mV max. Offset Temp. Coeff.: 50 µV / °C Notes: Input and output signal voltage referenced to supply common. Output is short circuit protected to common. DO NOT CONNECT TO +/-Vs. Adjustable to zero. Units operate with or without offset pin connected. How to Specify Center Frequency: Center 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: ± 25 mA typ., ± 40 mA max. Temperature Operating: 0 to + 70°C Storage: -25 to+85°C Pin-Out and Package Data 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.