Details, datasheet, quote on part number: 858L8EY
Description2" x 4" 8-pole Filters
CompanyFrequency Devices, Inc.
DatasheetDownload 858L8EY datasheet


Features, Applications

The 858 Series are digitally programmable low pass and high-pass active filters that are tunable over a 256:1 frequency range. 858 filters are available with any one of six standard factory-set tuning ranges to 102.4 kHz. These units contain 8 CMOS logic inputs that can be operated in a transparent or latching mode. All 858 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. 858 filters operate from non-critical 18 Vdc power supplies, have 10 kW (min.) input impedance, 10 W (max.) output impedance and offer dc voltage offset adjustment.

Features/Benefits: Lower cost, high precision replacement for 848 and 878 series products.

Low harmonic distortion and wide signal-to-noise ratio to 16 bit resolution. 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.

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

Programmable Specifications:. Page Digital Tuning & Control. 2 Available Low-Pass Models:. 858L8B 8-pole Butterworth. 8-pole, 6 zero elliptic, 8-pole, 6 zero elliptic, 8-pole, 6 zero elliptic, 858L8L 8-pole Bessel. 858L8D60 8-pole constant delay 858L8D80 8-pole constant delay 858L8D10 8-pole constant delay (-100dB). 4 Available High-Pass Models:. 858H8B 8-pole Butterworth. 8-pole, 6 zero elliptic, 8-pole, 6 zero elliptic, 8-pole, 6 zero elliptic, (-100dB). 5 General Specifications: Ordering information. 6 Pin-out/package data. 6

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 two 4042 quad CMOS latches which accept the following CMOS-compatible inputs: eight tuning bits D7), a latch strobe bit (C), and a transition polarity bit (P). Filter tuning follows the tuning equation given below: 2 ] 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

IN OUT GND "P" "C" +Vs -Vs Os Analog Input Signal Analog Output Signal Power and Signal Return Transition Polarity Bit Tuning Strobe Bit 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)

Data Control Lines Functions Latch Strobe (C) Transition Polarity (P)

frequency follows input codes frequency latched on rising edge frequency follows input codes frequency latched on falling edge

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 10 mA typ. +10 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

Notes: 1. Frequency data must be present before occurrence of strobe edge. 2. Frequency data must be present after occurrence of strobe edge.

Model Product Specifications Transfer Function Size, Model 2 Model 3 thru 6 Range fc, fr 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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