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UAF42 - UAF 42 UAF42 UAF 42 UNIVERSAL ACTIVE FILTER...

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© 1990 Burr-Brown Corporation PDS-1070H Printed in U.S.A. January, 1998 FEATURES VERSATILE— LOW-PASS, HIGH-PASS BAND-PASS, BAND-REJECT SIMPLE DESIGN PROCEDURE ACCURATE FREQUENCY AND Q — INCLUDES ON CHIP 1000pF ± 0.5% CAPACITORS APPLICATIONS TEST EQUIPMENT COMMUNICATIONS EQUIPMENT MEDICAL INSTRUMENTATION DATA ACQUISITION SYSTEMS MONOLITHIC REPLACEMENT FOR UAF41 UNIVERSAL ACTIVE FILTER DESCRIPTION The UAF42 is a universal active filter which can be configured for a wide range of low-pass, high-pass, and band-pass filters. It uses a classical state-variable analog architecture with an inverting amplifier and two integrators. The integrators include on-chip 1000pF capacitors trimmed to 0.5%. This solves one of the most difficult problems of active filter design— obtaining tight tolerance, low-loss capacitors. A DOS-compatible filter design program allows easy implementation of many filter types such as Butterworth, Bessel, and Chebyshev. A fourth, un- committed FET-input op amp (identical to the other three) can be used to form additional stages, or for special filters such as band-reject and Inverse Chebyshev. The classical topology of the UAF42 forms a time- continuous filter, free from the anomalies and switch- ing noise associated with switched-capacitor filter types. The UAF42 is available in 14-pin plastic DIP and SOL-16 surface-mount packages, specified for the – 25 ° C to +85 ° C temperature range. UAF42 International Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111 Twx: 910-952-1111 Internet: http://www.burr-brown.com/ FAXLine: (800) 548-6133 (US/Canada Only) Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132 High-Pass Out R R R 1000pF (1) In 2 In 3 In 1 R 1000pF (1) Band-Pass Out Low-Pass Out GND V+ V– NOTE: (1) ±0.5% R = 50k ±0.5% UAF42 UAF42 SBFS002
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UAF42 2 SPECIFICATIONS ELECTRICAL At T A = +25 ° C, V S = ± 15V, unless otherwise noted. UAF42AP, AU PARAMETER CONDITIONS MIN TYP MAX UNITS FILTER PERFORMANCE Frequency Range, fn 0 to 100 kHz Frequency Accuracy f = 1kHz 1 % vs Temperature 0.01 %/ ° C Maximum Q 400 Maximun (Q • Frequency) Product 500 kHz Q vs Temperature (f O • Q) < 10 4 0.01 %/ ° C (f O • Q) < 10 5 0.025 %/ ° C Q Repeatability (f O • Q) < 10 5 2 % Offset Voltage, Low-Pass Output ± 5 mV Resistor Accuracy 0.5 1% % OFFSET VOLTAGE (1) Input Offset Voltage ± 0.5 ± 5 mV vs Temperature ± 3 μ V/ ° C vs Power Supply V S = ± 6 to ± 18V 80 96 dB INPUT BIAS CURRENT (1) Input Bias Current V CM = 0V 10 50 pA Input Offset Current V CM = 0V 5 pA NOISE Input Voltage Noise Noise Density: f = 10Hz 25 nV/ Hz f = 10kHz 10 nV/ Hz Voltage Noise: BW = 0.1 to 10Hz 2 μ Vp-p Input Bias Current Noise Noise Density: f = 10kHz 2 fA/ Hz INPUT VOLTAGE RANGE (1) Common-Mode Input Range ± 11.5 V Common-Mode Rejection V CM = ± 10V 80 96 dB INPUT IMPEDANCE (1) Differential 10 13 || 2 || pF Common-Mode 10 13 || 6 || pF OPEN-LOOP GAIN (1) Open-Loop Voltage Gain V O = ± 10V, R L = 2k 90 126
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