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AD704ARZ-16-REEL 데이터시트(PDF) 1 Page - Analog Devices |
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AD704ARZ-16-REEL 데이터시트(HTML) 1 Page - Analog Devices |
1 / 16 page Picoampere Input Current Quad Bipolar Op Amp AD704 Rev. E Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 © 2001-2010 Analog Devices, Inc. All rights reserved. FEATURES High dc precision 150 µV maximum offset voltage 1.5 µV/°C maximum offset voltage drift 270 pA maximum input bias current 0.3 pA/°C typical IB drift Low noise: 0.5 µV p-p Typical noise: 0.1 Hz to 10 Hz Low power: 600 µA maximum supply current per amplifier Dual version: AD706 APPLICATIONS Industrial/process controls Weigh scales ECG/EKG instrumentation Low frequency active filters GENERAL DESCRIPTION The AD704 is a quad, low power bipolar op amp that has the low input bias current of a BiFET amplifier and offers a signifi- cantly lower IB drift over temperature. It uses superbeta bipolar input transistors to achieve picoampere input bias current levels (similar to FET input amplifiers at room temperature), while its IB typically increases only by 5× at 125°C (unlike a BiFET amp, for which IB doubles every 10°C, resulting in a 1000× increase at 125°C). In addition, the AD704 achieves 150 μV offset voltage and the low noise characteristics of a precision bipolar input op amp. Because it has only 1/20 the input bias current of an OP07, the AD704 does not require the commonly used balancing resistor. Furthermore, the current noise is 1/5 that of the OP07, which makes the AD704 usable with much higher source impedances. At 1/6 the supply current (per amplifier) of the OP07, the AD704 is better suited for today’s higher density circuit boards and battery-powered applications. The AD704 is an excellent choice for use in low frequency active filters in 12- and 14-bit data acquisition systems, in precision instrumentation, and as a high quality integrator. The AD704 is internally compensated for unity gain stability. The AD704J is rated over the commercial temperature range of 0°C to 70°C. The AD704A is rated over the industrial temperature of −40°C to +85°C. The AD704S is rated over the military temperature range of −55°C to +125°C, processed to MIL-STD-883B. CONNECTION DIAGRAMS OUTPUT 1 –IN 2 +IN 3 +VS 4 OUTPUT 14 –IN 13 +IN 12 –VS 11 +IN 5 –IN 6 OUTPUT 7 +IN 10 –IN 9 OUTPUT 8 1 4 2 3 AD704 TOP VIEW (Not to Scale) OUTPUT 1 –IN 2 +IN 3 +VS 4 OUTPUT 16 –IN 15 +IN 14 –VS 13 +IN 5 –IN 6 OUTPUT 7 8 +IN 12 –IN 11 OUTPUT NC NC 10 9 1 4 2 3 AD704 TOP VIEW (Not to Scale) NC = NO CONNECT Figure 1. 14-Lead Plastic DIP (N) Figure 2. 16-Lead SOIC (R) Package 4 +IN1 5 NC 6 +VS 7 NC 8 +IN2 NC = NO CONNECT 18 +IN4 17 NC 16 –VS 15 NC 14 +IN3 13 12 11 10 9 19 20 1 2 3 1 4 2 3 AD704 TOP VIEW (Not to Scale) Figure 3. 20-Terminal LCC (E-20-1) Package 100 10 1 0.1 0.01 –55 25 125 TEMPERATURE (°C) TYPICAL JFET AMP AD704 Figure 4. Input Bias Current Over Temperature Table 1. Low IB @ 125°C Model 30V 16V 1.3 to 5V Next Generation Single N/A AD8663 AD8603 N/A Dual AD706 AD8667 AD8607 AD8622 Quad AD704 AD8669 AD8609 AD8624 |
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