PDF INA122 Data sheet ( Hoja de datos )

Número de pieza	INA122
Descripción	Single Supply/ MicroPower INSTRUMENTATION AMPLIFIER
Fabricantes	Burr-Brown Corporation
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No Preview Available ! ® INA122 INA122 INA122 Single Supply, MicroPower INSTRUMENTATION AMPLIFIER FEATURES q LOW QUIESCENT CURRENT: 60µA q WIDE POWER SUPPLY RANGE Single Supply: 2.2V to 36V Dual Supply: –0.9/+1.3V to ±18V q COMMON-MODE RANGE TO (V–)–0.1V q RAIL-TO-RAIL OUTPUT SWING q LOW OFFSET VOLTAGE: 250µV max q LOW OFFSET DRIFT: 3µV/°C max q LOW NOISE: 60nV/√ Hz q LOW INPUT BIAS CURRENT: 25nA max q 8-PIN DIP AND SO-8 SURFACE-MOUNT VI+N 3 8 RG 1 VI–N 2 V+ 7 INA122 100kΩ 25kΩ 25kΩ 6 VO VO = (VI+N – VI–N) G G = 5 + 200k RG 100kΩ 5 Ref APPLICATIONS q PORTABLE, BATTERY OPERATED SYSTEMS q INDUSTRIAL SENSOR AMPLIFIER: Bridge, RTD, Thermocouple q PHYSIOLOGICAL AMPLIFIER: ECG, EEG, EMG q MULTI-CHANNEL DATA ACQUISITION DESCRIPTION The INA122 is a precision instrumentation amplifier for accurate, low noise differential signal acquisition. Its two-op-amp design provides excellent performance with very low quiescent current, and is ideal for portable instrumentation and data acquisition systems. The INA122 can be operated with single power sup- plies from 2.2V to 36V and quiescent current is a mere 60µA. It can also be operated from dual supplies. By utilizing an input level-shift network, input common- mode range extends to 0.1V below negative rail (single supply ground). A single external resistor sets gain from 5V/V to 10000V/V. Laser trimming provides very low offset voltage (250µV max), offset voltage drift (3µV/°C max) and excellent common-mode rejection. Package options include 8-pin plastic DIP and SO-8 surface-mount packages. Both are specified for the –40°C to +85°C extended industrial temperature range. 4 V– 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 ©1997 Burr-Brown Corporation PDS-1388B Printed in U.S.A. October, 1997 1 page TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C and VS = ±5V, unless otherwise noted. 1000 VOLTAGE and CURRENT NOISE DENSITY vs FREQUENCY (RTI) 100 10 1 VN IN 10 100 Frequency (Hz) 1k 10k SETTLING TIME vs GAIN 10 10V Step 1 0.01% 0.1% 0.1 1 10 100 Gain (V/V) 1k 10 8 6 4 2 0 –2 –4 –6 –8 –10 0 INPUT-REFERRED OFFSET VOLTAGE WARM-UP Turn-on time ≤ 1ms. Settling time to final value depends on Gain—see settling time. (Noise) 1 2 3 4 5 6 7 8 9 10 Time After Turn-On (ms) QUIESCENT CURRENT vs TEMPERATURE 80 60 40 20 0 –75 –50 –25 0 25 50 Temperature (°C) 75 100 125 TOTAL HARMONIC DISTORTION+NOISE vs FREQUENCY 1 0.1 G = 100 0.01 0.001 10 G=5 100 1k Frequency (Hz) RL = ∞ RL = 25kΩ 10k V+ (V+)–1 (V+)–2 (V–)+2 (V–)+1 V– 0 OUTPUT VOLTAGE SWING vs OUTPUT CURRENT Sourcing Current Sinking Current 5 10 15 20 Output Current (mA) 25 ® 5 INA122 5 Page

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