Details, datasheet, quote on part number: 824L8Y2
Description2" x 2" 4-pole Filters
CompanyFrequency Devices, Inc.
DatasheetDownload 824L8Y2 datasheet


Features, Applications

The 824 Series are digitally programmable low pass and high pass active filters that are tunable over a 256:1 frequency range. 824 filters are available with any one of five standard factory-set tuning ranges to 102.4 kHz. These units contain 8 CMOS logic inputs. All 824 Series models are convenient, low profile, easy to use fully finished filters which require no external components or adjustments. They feature low harmonic distortion, and near theoretical phase and amplitude characteristics. 824 filters operate from non-critical 18 Vdc power supplies, have 10 kW (min.) input impedance, 10 W (max.) output.

Compact x 2" design minimizes board space requirements. Digitally programmable corner frequency allows selecting cut-off frequencies specific to each application. Plug-in ready-to-use, reducing engineering design and manufacturing cycle time. Factory-set tuning range, no external clocks or adjustments needed. Broad range of transfer characteristics and corner frequencies to meet a wide range of applications.


Programmable Specifications. Page Digital Tuning & Control. 2 Available Low-Pass Models:. 824L8B 4-pole Butterworth. 824L8L 4-pole Bessel. 824L8Y2 4-pole Cheby (0.2 dB Ripple). 824L8Y5 4-pole Cheby (0.5 dB Ripple). 3 Available High-Pass Models:. 824H8B 4-pole Butterworth. 824H8Y2 4-pole Cheby (0.2 dB Ripple). 824H8Y5 4-pole Cheby (0.5 dB Ripple). 4 General Specifications: Ordering information. 5 Pin-out/package data. 5

Anti-alias filtering Data acquisition systems Communication systems and electronics Medical electronics equipment and research Aerospace, navigation and sonar applications Sound and vibration testing Real and compressed time data analysis Noise elimination Signal reconstruction

1784 Chessie Lane, Ottawa, IL 61350 Tel: 800/252-7074, 815/434-7800 FAX: 815/434-8176 e-mail: Web Address:

The digital tuning interface circuits are a parallel set of eight (8) 4053 CMOS switches which accept CMOS compatible inputs for the eight tuning bits - D7). Filter tuning follows the tuning equation given below: 20 ] where or "1", and fmax = Maximum tuning frequency; fc = corner frequency; Minimum tunable frequency fmax/256 (D0 thru = 0); Minimum frequency step (Resolution) = fmax/256

Pin-Out Key IN OUT GND +Vs -Vs Os Analog Input Signal Analog Output Signal Power and Signal Return Supply Voltage, Positive Supply Voltage, Negative Offset Adjustment D7 Tuning D6 Tuning D5 Tuning D4 Tuning D3 Tuning D2 Tuning D1 Tuning D0 Tuning Bit 7 (MSB) (LSB)

Input Data Levels (CMOS Logic) 4 Vdc max. 15 Vdc max. -1 mA max.. +1 mA max. 7.5 pF max. MSB 27 D7 Input Voltage (Vs = 15 Vdc) Low Level In 0 Vdc min. High Level In 11 Vdc min. Input Current High Level In Low Level In Input Capacitance Input Data Format Positive Logic Bit Weighting D0 D7 Frequency Range -5 mA typ. -5 mA typ. 5 pF typ

Frequency Select Bits Logic "1" = +Vs Logic "0" = Gnd (Binary-Coded) LSB (least significant bit) MSB (most significant bit) : 1, Binary Weighted

Model Product Specifications Transfer Function Size, Model 2 Model 3 thru 6 Range fc Theoretical Transfer Characteristics Passband Ripple

Stopband Attenuation Rate Cutoff Frequency Stability Amplitude Phase Filter Attenuation
Total Harmonic Distortion @ 1 kHz Wide Band Noise

1. Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.


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