Precision Dual-Channel Difference Amplifier Data Sheet AD8270 FEATURES FUNCTIONAL BLOCK DIAGRAM With no external resistors Difference amplifier: gains of 0.5, 1, or 2 Single ended amplifiers: over 40 different gains Set reference voltage at midsupply Excellent ac specifications 10k 10k 10k 10k IN1A 1 12 IN1B 15 MHz bandwidth 30 V/s slew rate 10k 10k IN2A 2 11 IN2B High accuracy dc performance 0.08% maximum gain error 10k 10k +IN2A 3 10 +IN2B + + 10 ppm/C maximum gain drift AD8270 10k 10k 80 dB minimum CMRR (G = 2) +IN1A49 +IN1B Two channels in small 4 mm 4 mm LFCSP Supply current: 2.5 mA per channel 20k 20k 20k 20k Supply range: 2.5 V to 18 V APPLICATIONS Instrumentation amplifier building blocks Level translators Figure 1. Automatic test equipment High performance audio Sine/cosine encoders The AD8270 operates on both single and dual supplies and GENERAL DESCRIPTION requires only 2.5 mA maximum supply current for each ampli- The AD8270 is a low distortion, dual-channel amplifier with fier. It is specified over the industrial temperature range of internal gain setting resistors. With no external components, 40C to +85C and is fully RoHS compliant. it can be configured as a high performance difference amplifier with gains of 0.5, 1, or 2. It can also be configured in over 40 single- Table 1. Difference Amplifiers by Category ended configurations, with gains ranging from 2 to +3. High Single-Supply Single-Supply The AD8270 is the first dual-difference amplifier in the small High Speed Voltage Unidirectional Bidirectional 4 mm 4 mm LFCSP. It requires the same board area as a typical AD8270 AD628 AD8202 AD8205 single-difference amplifier. The smaller package allows a 2 AD8273 AD629 AD8203 AD8206 increase in channel density and a lower cost per channel, all AMP03 AD8216 with no compromise in performance. Rev. A Document Feedback 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 20082016 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. REF1A +V S REF2A OUTA REF2B OUTB REF1B V S 06979-001 5 16 6 15 7 14 8 13AD8270 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Circuit Information .................................................................... 13 Applications ....................................................................................... 1 Driving the AD8270 ................................................................... 13 Functional Block Diagram .............................................................. 1 Package Considerations ............................................................. 13 General Description ......................................................................... 1 Power Supplies ............................................................................ 13 Revision History ............................................................................... 2 Input Voltage Range ................................................................... 14 Specifications ..................................................................................... 3 Applications Information .............................................................. 15 Difference Amplifier Configurations ........................................ 3 Difference Amplifier Configurations ...................................... 15 Absolute Maximum Ratings ............................................................ 5 Single-Ended Configurations ................................................... 15 Thermal Resistance ...................................................................... 5 Differential Output .................................................................... 17 Maximum Power Dissipation ..................................................... 5 Driving an ADC ......................................................................... 18 ESD Caution .................................................................................. 5 Driving Cabling .......................................................................... 18 Pin Configuration and Function Descriptions ............................. 6 Outline Dimensions ....................................................................... 19 Typical Performance Characteristics ............................................. 7 Ordering Guide .......................................................................... 19 Theory of Operation ...................................................................... 13 REVISION HISTORY 5/2016Rev. 0 to Rev. A Changes to Figure 3 and Table 6 ..................................................... 6 Updated Outline Dimensions ....................................................... 19 Changes to Ordering Guide .......................................................... 19 1/2008Revision 0: Initial Version Rev. A Page 2 of 20