Very Low Distortion, Precision Difference Amplifier AD8274 FEATURES FUNCTIONAL BLOCK DIAGRAM +V S Very low distortion 7 0.00025% THD + N (20 kHz) 0.0015% THD + N (100 kHz) 12k 6k 2 5 Drives 600 loads Excellent gain accuracy 0.03% maximum gain error 6 2 ppm/C maximum gain drift Gain of or 2 12k 6k 3 1 AC specifications 20 V/s minimum slew rate 4 800 ns to 0.01% settling time V S High accuracy dc performance Figure 1. 83 dB minimum CMRR 700 V maximum offset voltage 8-lead SOIC and MSOP packages Supply current: 2.6 mA maximum Table 1. Difference Amplifiers by Category Supply range: 2.5 V to 18 V Low High Single-Supply Single-Supply APPLICATIONS Distortion Voltage Unidirectional Bidirectional ADC driver AD8270 AD628 AD8202 AD8205 High performance audio AD8273 AD629 AD8203 AD8206 Instrumentation amplifier building blocks AD8274 AD8216 Level translators AMP03 Automatic test equipment Sine/cosine encoders GENERAL DESCRIPTION The AD8274 is a difference amplifier that delivers excellent ac With no external components, the AD8274 can be configured and dc performance. Built on Analog Devices, Inc., proprietary as a G = or G = 2 difference amplifier. For single-ended iPolar process and laser-trimmed resistors, AD8274 achieves a applications that need high gain stability or low distortion breakthrough in distortion vs. current consumption and has performance, the AD8274 can also be configured for several excellent gain drift, gain accuracy, and CMRR. gains ranging from 2 to +3. Distortion in the audio band is an extremely low 0.00025% The excellent distortion and dc performance of the AD8274, (112 dB) at a gain of and 0.00035% (109 dB) at a gain of 2 along with its high slew rate and bandwidth, make it an excellent while driving a 600 load ADC driver. Because of the parts high output drive, it also makes a very good cable driver. With supply voltages up to 18 V (+36 V single supply), the AD8274 is well suited for measuring large industrial signals. The AD8274 only requires 2.6 mA maximum supply current. It Additionally, the parts resistor divider architecture allows it to is specified over the industrial temperature range of 40C to measure voltages beyond the supplies. +85C and is fully RoHS compliant. For the dual version, see the AD8273 data sheet. 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 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 20082011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 07362-001AD8274 TABLE OF CONTENTS Features .............................................................................................. 1 Pin Configurations and Function Description..............................5 Applications....................................................................................... 1 Typical Performance Characteristics ..............................................6 Functional Block Diagram .............................................................. 1 Theory of Operation ...................................................................... 12 General Description ......................................................................... 1 Circuit Information.................................................................... 12 Revision History ............................................................................... 2 Driving the AD8274................................................................... 12 Specifications..................................................................................... 3 Power Supplies............................................................................ 12 Absolute Maximum Ratings............................................................ 4 Input Voltage Range................................................................... 12 Thermal Resistance ...................................................................... 4 Configurations............................................................................ 13 Maximum Power Dissipation ..................................................... 4 Driving Cabling .......................................................................... 14 Short-Circuit Current .................................................................. 4 Outline Dimensions....................................................................... 15 ESD Caution.................................................................................. 4 Ordering Guide .......................................................................... 15 REVISION HISTORY 8/11Rev. B to Rev. C Changes to Input Voltage Range Parameter, Table 2 ................... 3 1/11Rev. A to Rev. B Changes to Impedance/Differential Parameter, Table 2.............. 3 Changes to Figure 17........................................................................ 8 Updated Outline Dimensions ....................................................... 15 12/08Rev. 0 to Rev. A Changes to Figure 8 and Figure 10................................................. 6 7/08Revision 0: Initial Version Rev. C Page 2 of 16