30 V Zero-Drift, Rail-to-Rail Output Precision Amplifier Data Sheet ADA4638-1 FEATURES PIN CONFIGURATIONS ADA4638-1 Single supply operation: 4.5 V to 30 V NC 1 8 NC Dual supply operation: 2.25 V to 15 V IN 2 7 V+ TOP VIEW Low offset voltage: 4 V maximum (Not to Scale) +IN 3 6 OUT Input offset voltage drift: 0.05 V/C maximum V 4 5 NC High gain: 130 dB minimum High PSRR: 120 dB minimum NOTES 1. NC = NO CONNECT. DO NOT High CMRR: 130 dB minimum CONNECT TO THIS PIN. Input common-mode range includes lower supply rail Figure 1. 8-Lead SOIC Rail-to-rail output ADA4638-1 Low supply current: 0.95 mA maximum NC 1 8NC IN 2 7V+ APPLICATIONS TOP VIEW (Not to Scale) 6OUT +IN 3 Electronic weigh scale V 4 5NC Pressure and position sensors Strain gage amplifiers NOTES 1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN. Medical instrumentation 2. IT IS RECOMMENDED THAT THE EXPOSED PAD BE Thermocouple amplifiers CONNECTED TO V. Figure 2. 8-Lead LFCSP GENERAL DESCRIPTION The ADA4638-1 is a high voltage, high precision, zero-drift Table 1. Analog Devices, Inc., Zero-Drift Op Amp Portfolio amplifier featuring rail-to-rail output swing. It is guaranteed to Offset Offset operate from 4.5 V to 30 V single supply or 2.25 V to 15 V Operating Voltage Voltage Drift dual supplies while consuming less than 0.95 mA of supply Voltage Type Product (V) Max (V/C) Max current at 5 V. 30 V Single ADA4638-1 4.5 0.08 16 V Single AD8638 9 0.06 With an offset voltage of 4 V, offset drift less than 0.05 V/C, Dual AD8639 9 0.06 no 1/f noise, and input voltage noise of only 1.2 V p-p (0.1 Hz 5 V Single ADA4528-1 2.5 0.015 to 10 Hz), the ADA4638-1 is suited for high precision applications AD8628 5 0.02 where large error sources cannot be tolerated. Pressure sensors, AD8538 13 0.1 medical equipment, and strain gage amplifiers benefit greatly ADA4051-1 15 0.1 from nearly zero drift over the wide operating temperature range. Many applications can take advantage of the rail-to-rail Dual AD8629 5 0.02 output swing provided by the ADA4638-1 to maximize the signal- AD8539 13 0.1 to-noise ratio (SNR). ADA4051-2 15 0.1 Quad AD8630 5 0.02 The ADA4638-1 is specified for the extended industrial (40C to +125C) temperature range and is available in 8-lead LFCSP (3 mm 3 mm) and SOIC packages. Rev. 0 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 10072-001 10072-002ADA4638-1 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................7 Applications....................................................................................... 1 Applications Information .............................................................. 16 Pin Configurations ........................................................................... 1 Differentiation ............................................................................ 16 General Description ......................................................................... 1 Theory of Operation .................................................................. 17 Revision History ............................................................................... 2 Input Protection ......................................................................... 17 Specifications..................................................................................... 3 No Output Phase Reversal ........................................................ 17 Electrical Characteristics30 V Operation ............................. 3 Noise Considerations................................................................. 18 Electrical Characteristics10 V Operation ............................. 4 Comparator Operation.............................................................. 18 Electrical Characteristics5 V Operation................................ 5 Precision Low-Side Current Shunt Sensor.............................. 20 Absolute Maximum Ratings............................................................ 6 Printed Circuit Board Layout ................................................... 20 Thermal Resistance ...................................................................... 6 Outline Dimensions....................................................................... 21 ESD Caution.................................................................................. 6 Ordering Guide .......................................................................... 21 REVISION HISTORY 10/11Revision 0: Initial Version Rev. 0 Page 2 of 24