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AD8639ACPZ-REEL7 Datasheet(PDF) 1 Page - Analog Devices |
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AD8639ACPZ-REEL7 Datasheet(HTML) 1 Page - Analog Devices |
1 / 20 page 16 V Auto-Zero, Rail-to-Rail Output Operational Amplifiers AD8638/AD8639 Rev. F Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother 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 ©2007–2010 Analog Devices, Inc. All rights reserved. FEATURES Low offset voltage: 9 μV maximum Offset drift: 0.04 μV/°C maximum Rail-to-rail output swing 5 V to 16 V single-supply or ±2.5 V to ±8 V dual-supply operation High gain: 136 dB typical High CMRR: 133 dB typical High PSRR: 143 dB typical Very low input bias current: 40 pA maximum Low supply current: 1.3 mA maximum AD8639: qualified for automotive applications APPLICATIONS Pressure and position sensors Strain gage amplifiers Medical instrumentation Thermocouple amplifiers Automotive sensors Precision references Precision current sensing GENERAL DESCRIPTION The AD8638/AD8639 are single and dual wide bandwidth, auto-zero amplifiers featuring rail-to-rail output swing and low noise. These amplifiers have very low offset, drift, and bias current. Operation is fully specified from 5 V to 16 V single supply (±2.5 V to ±8 V dual supply). The AD8638/AD8639 provide benefits previously found only in expensive zero-drift or chopper-stabilized amplifiers. Using the Analog Devices, Inc., topology, these auto-zero amplifiers combine low cost with high accuracy and low noise. No exter- nal capacitors are required. In addition, the AD8638/AD8639 greatly reduce the digital switching noise found in most chopper- stabilized amplifiers. With a typical offset voltage of only 3 μV, drift of 0.01 μV/°C, and noise of 1.2 μV p-p (0.1 Hz to 10 Hz), the AD8638/AD8639 are 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 ranges. Many systems can take advantage of the rail-to-rail output swing provided by the AD8638/AD8639 to maximize signal-to-noise ratio (SNR). PIN CONFIGURATIONS OUT 1 V– 2 +IN 3 V+ 5 –IN 4 AD8638 TOP VIEW (Not to Scale) Figure 1. 5-Lead SOT-23 (RJ-5) NC 1 –IN 2 +IN 3 V– 4 NC 8 V+ 7 OUT 6 NC 5 NC = NO CONNECT AD8638 TOP VIEW (Not to Scale) Figure 2. 8-Lead SOIC_N (R-8) OUT A 1 –IN A 2 +IN A 3 V– 4 V+ 8 OUT B 7 –IN B 6 +IN B 5 AD8639 TOP VIEW (Not to Scale) Figure 3. 8-Lead MSOP (RM-8) 8-Lead SOIC_N (R-8) PIN 1 INDICATOR NOTES 1. PIN 4 AND THE EXPOSED PAD MUST BE CONNECTED TO V–. AD8639 1 OUT A 2 –IN A 3 +IN A 4 v– 7OUT B 8V+ 6 –IN B 5 +IN B TOP VIEW (Not to Scale) Figure 4. 8-Lead LFCSP_WD (CP-8-5) The AD8638/AD8639 are specified for the extended industrial temperature range (−40°C to +125°C). The single AD8638 is available in tiny 5-lead SOT-23 and 8-lead SOIC packages. The dual AD8639 is available in 8-lead MSOP, 8-lead SOIC, and 8-lead LFCSP packages. See the Ordering Guide for automotive grades. The AD8638/AD8639 are members of a growing series of auto- zero op amps offered by Analog Devices (see Table 1). Table 1. Auto-Zero Op Amps Supply 2.7 V to 5 V 2.7 V to 5 V Low Power 5 V to 16 V Single AD8628 AD8538 AD8638 Dual AD8629 AD8539 AD8639 Quad AD8630 |
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