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AD8628AUJ-REEL 데이터시트(PDF) 1 Page - Analog Devices |
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AD8628AUJ-REEL 데이터시트(HTML) 1 Page - Analog Devices |
1 / 20 page Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier AD8628/AD8629 Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. FEATURES Lowest auto-zero amplifier noise Low offset voltage: 1 µV Input offset drift: 0.002 µV/°C Rail-to-rail input and output swing 5 V single-supply operation High gain, CMRR, and PSRR: 120 dB Very low input bias current: 100 pA max Low supply current: 1.0 mA Overload recovery time: 10 µs No external components required APPLICATIONS Automotive sensors Pressure and position sensors Strain gage amplifiers Medical instrumentation Thermocouple amplifiers Precision current sensing Photodiode amplifier PIN CONFIGURATIONS OUT 1 V– 2 +IN 3 V+ 5 –IN 4 AD8628 TOP VIEW (Not to Scale) Figure 1. 5-Lead TSOT (UJ-5) and 5-Lead SOT-23 (RT-5) NC 1 –IN 2 +IN 3 V– 4 NC 8 V+ 7 OUT 6 NC 5 NC = NO CONNECT AD8628 TOP VIEW (Not to Scale) Figure 2. 8-Lead SOIC (R-8) OUT A 1 –IN A 2 +IN A 3 V– 4 V+ 8 OUT B 7 –IN B 6 +IN B 5 AD8629 TOP VIEW (Not to Scale) Figure 3. 8-Lead SOIC (R-8) OUT A 1 –IN A 2 +IN A 3 V– 4 V+ 8 OUT B 7 –IN B 6 +IN B 5 AD8629 TOP VIEW (Not to Scale) Figure 4. 8-Lead MSOP (RM-8) GENERAL DESCRIPTION This new breed of amplifier has ultralow offset, drift, and bias current. The AD8628/AD8629 are wide bandwidth auto-zero amplifiers featuring rail-to-rail input and output swings and low noise. Operation is fully specified from 2.7 V to 5 V single supply (±1.35 V to ±2.5 V dual supply). The AD8628/AD8629 provide benefits previously found only in expensive auto-zeroing or chopper-stabilized amplifiers. Using Analog Devices’ new topology, these zero-drift amplifiers combine low cost with high accuracy and low noise. (No exter- nal capacitor is required.) In addition, the AD8628/AD8629 greatly reduce the digital switching noise found in most chopper-stabilized amplifiers. With an offset voltage of only 1 µV, drift of less than 0.005 µV/°C, and noise of only 0.5 µV p-p (0 Hz to 10 Hz), the AD8628/AD8629 are perfectly suited for applications in which error sources cannot be tolerated. Position and pressure sensors, medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift over their operating temperature range. Many systems can take advantage of the rail-to-rail input and output swings provided by the AD8628/AD8629 to reduce input biasing complexity and maximize SNR. The AD8628/AD8629 are specified for the extended industrial temperature range (−40°C to +125°C). The AD8628 is available in tiny TSOT-23, SOT-23, and the popular 8-lead narrow SOIC plastic packages. The AD8629 is available in the standard 8-lead narrow SOIC and MSOP plastic packages. |
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