Dual Very Low Noise Precision Operational Amplifier Data Sheet OP270 FEATURES FUNCTIONAL BLOCK DIAGRAMS Very low noise density of 5 nV/Hz at 1 kHz maximum IN A 1 16 OUT A Excellent input offset voltage of 75 V maximum +IN A 2 15 NC NC 3 14 NC Low offset voltage drift of 1 V/C maximum V 4 13 V+ Very high gain of 1500 V/mV minimum OP270 NC 5 12 NC Outstanding CMR of 106 dB minimum +IN B 6 11 NC Slew rate of 2.4 V/s typical IN B 7 10 OUT B Gain bandwidth product of 5 MHz typical NC 8 9 NC Industry-standard 8-lead dual pinout NC = NO CONNECT Figure 1. 16-Lead SOIC (S-Suffix) OUT A 1 8 V+ AB IN A 2 7 OUT B +IN A 3 6 IN B 4 5 V +IN B OP270 Figure 2. 8-Lead PDIP (P-Suffix) 8-Lead CERDIP (Z-Suffix) GENERAL DESCRIPTION The OP270 is a high performance, monolithic, dual operational consumption of the dual OP270 is one-third less than two OP27 amplifier with exceptionally low voltage noise density (5 nV/Hz devices, a significant advantage for power conscious applications. maximum at 1 kHz). It offers comparable performance to the The OP270 is unity-gain stable with a gain bandwidth product industry-standard OP27 from Analog Devices, Inc. of 5 MHz and a slew rate of 2.4 V/s. The OP270 features an input offset voltage of less than 75 V The OP270 offers excellent amplifier matching, which is and an offset drift of less than 1 V/C, guaranteed over the full important for applications such as multiple gain blocks, low military temperature range. Open-loop gain of the OP270 is more noise instrumentation amplifiers, dual buffers, and low noise than 1,500,000 into a 10 k load, ensuring excellent gain accuracy active filters. and linearity, even in high gain applications. The input bias The OP270 conforms to the industry-standard 8-lead CERDIP current is less than 20 nA, which reduces errors due to signal and PDIP pinouts. source resistance. With a common-mode rejection (CMR) of For higher speed applications, the ADA4004-2 or the AD8676 greater than 106 dB and a power supply rejection ratio (PSRR) are recommended. For a quad op amp, see the OP470 data sheet. of less than 3.2 V/V, the OP270 significantly reduces errors due to ground noise and power supply fluctuations. The power Rev. F 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 20012015 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. 00325-001 00325-002OP270 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Voltage and Current Noise ........................................................ 12 Functional Block Diagrams ............................................................. 1 Total Noise and Source Resistance ........................................... 12 General Description ......................................................................... 1 Noise Measurements .................................................................. 14 Revision History ............................................................................... 2 Capacitive Load Driving and Power Supply Considerations .... 15 Specif icat ions ..................................................................................... 3 Unity-Gain Buffer Applications ............................................... 15 Electrical Specifications ............................................................... 4 Low Phase Error Amplifier ....................................................... 16 Absolute Maximum Ratings ............................................................ 5 Five-Band, Low Noise, Stereo Graphic Equalizer .................. 16 ESD Caution .................................................................................. 5 Digital Panning Control ............................................................ 17 Typical Performance Characteristics ............................................. 6 Dual Programmable Gain Amplifier ....................................... 17 Test Circuits ..................................................................................... 11 Outline Dimensions ....................................................................... 19 Applications Information .............................................................. 12 Ordering Guide .......................................................................... 20 REVISION HISTORY 10/15Rev. E to Rev. F 4/03Rev. B to Rev. C Changes to General Description Section ...................................... 1 Deletion of OP270A model ............................................... Universal Changes to Supply Voltage Parameter and Differential Input Edits to Features ................................................................................. 1 Voltage Parameter, Table 3 .............................................................. 5 Changes to Specifications ................................................................. 2 Deleted Table 4 Renumbered Sequentially .................................. 5 Deletion of Wafer Limits and Dice Characteristics ...................... 4 Changes to Absolute Maximum Ratings ........................................ 4 2/10Rev. D to Rev. E Changes to Ordering Guide ............................................................. 4 Change to Input Noise Current Density Parameter, Table 1 ...... 3 Changes to Equations in Noise Measurements section ............. 10 Change to Figure 18 ......................................................................... 8 Change to Figure 10 ....................................................................... 11 Updated Outline Dimensions ....................................................... 14 2/09Rev. C to Rev. D Updated Format .................................................................. Universal 11/02Rev. A to Rev. B Reorganized Layout ............................................................ Universal Updated Ordering Guide .............................................................. 15 Changes to Figure 7 .......................................................................... 6 9/02Rev. 0 to Rev. A Changes to Figure 22 ........................................................................ 9 Deleted Applications Heading ...................................................... 11 Edits to Absolute Maximum Ratings .............................................. 5 Changes to Figure 44 ...................................................................... 17 Edits to Ordering Guide ................................................................ 15 Changes to Figure 46 ...................................................................... 18 Updated Outline Dimensions ....................................................... 19 2/01Revision 0: Initial Version Changes to Ordering Guide .......................................................... 20 Rev. F Page 2 of 20