OPA2111 - OPA2111 Dual Low Noise Precision Difet...

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Dual Low Noise Precision Difet ® OPERATIONAL AMPLIFIER FEATURES LOW NOISE: 100% Tested, 8nV/ Hz max at 10kHz LOW BIAS CURRENT: 4pA max LOW OFFSET: 500 μ V max LOW DRIFT: 2.8 μ V/ ° C HIGH OPEN-LOOP GAIN: 114dB min HIGH COMMON-MODE REJECTION: 96dB min APPLICATIONS PRECISION INSTRUMENTATION DATA ACQUISITION TEST EQUIPMENT PROFESSIONAL AUDIO EQUIPMENT MEDICAL EQUIPMENT DETECTOR ARRAYS 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 Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132 BIFET ® National Semiconductor Corp., ® Burr-Brown Corp. Noise-Free Cascode* OPA2111 Simplified Circuit (Each Amplifier) 8 4 Output +V CC –V CC –In +In *Patented OPA2111 ® DESCRIPTION The OPA2111 is a high precision monolithic dielectrically isolated FET ( ) operational ampli- fier. Outstanding performance characteristics allow its use in the most critical instrumentation applications. Noise, bias current, voltage offset, drift, open-loop gain, common-mode rejection, and power supply re- jection are superior to BIFET ® amplifiers. Very low bias current is obtained by dielectric isola- tion with on-chip guarding. Laser trimming of thin-film resistors gives very low offset and drift. Extremely low noise is achieved with patented circuit design techniques. A cascode design allows high precision input specifications and reduced susceptibility to flicker noise. Standard dual op amp pin configuration allows up- grading of existing designs to higher performance levels. © 1984 Burr-Brown Corporation PDS-540E Printed in U.S.A. October, 1993
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® OPA2111 2 SPECIFICATIONS ELECTRICAL At V CC = ± 15VDC and T A = +25 ° C unless otherwise noted . OPA2111AM OPA2111BM OPA2111SM OPA2111KM, KP PARAMETER CONDITION MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS INPUT NOISE Voltage, f O = 10Hz 100% Tested 40 80 30 60 40 80 40 nV/ Hz f O = 100Hz 100% Tested 15 40 11 30 15 40 15 nV/ Hz f O = 1kHz 100% Tested 8 15 7 12 8 15 8 nV/ Hz f O = 10kHz (1) 6 8 68 6 n V / Hz f B = 10Hz to 10kHz (1) 0.7 1.2 0.6 1 0.7 1.2 0.7 μ Vrms f B = 0.1Hz to 10Hz (1) 1.6 3.3 1.2 2.5 1.6 3.3 1.6 μ Vp-p Current, f B = 0.1Hz to 10Hz (1) 15 24 12 19 15 24 15 fAp-p f O = 0.1Hz to 20kHz (1) 0.8 1.3 0.6 1 0.8 1 0.8 fA/ Hz OFFSET VOLTAGE (2) Input Offset Voltage V CM = 0VDC ± 0.1 ± 0.75 ± 0.05 ± 0.5 ± 0.1 ± 0.75 ± 0.3 ± 2m V Average Drift T A = T MIN to T MAX ± 2 ± 6 ± 0.5 ± 2.8 ± 2 ± 6 ± 8 ± 15 μ V/ ° C Match ± 1 ± 0.5 2 2 μ V/ ° C Supply Rejection 90 110 96 110 90 110 86 110 dB ± 3 ± 31 ± 3 ± 16 ± 3 ± 31 ± 3 ± 50 μ V/V Channel Separation 100Hz, R L = 2k 136 136 136 136 dB BIAS CURRENT (2) Input Bias Current V CM = 0VDC ± 2 ± 8 ± 1.2 ± 4 ± 2 ± 8 ± 3 ± 15 pA Match ± 1 ± 0.5 ± 12 p A OFFSET CURRENT (2) Input Offset Current V CM = 0VDC ± 1.2 ± 6 ± 0.6 ± 3 ± 1.2 ± 6 ± 3 ± 12 pA IMPEDANCE Differential 10 13 || 1 10 13 || 1 10 13 || 1 10 13 || 1 || pF Common-Mode 10 14 || 3 10 14 || 3 10 14 || 3 10 14 || 3 || pF VOLTAGE RANGE Common-Mode Input Range ± 10 ± 11 ± 10 ± 11 ± 10 ± 11 ± 10 ± 11 V Common-Mode Rejection V IN = ± 10VDC 90 110 96 110 90 110 82 110 dB OPEN-LOOP GAIN, DC Open-Loop Voltage Gain R L 2k 110 125 114
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OPA2111 - OPA2111 Dual Low Noise Precision Difet...

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