Micropower Single-Supply Rail-to-Rail Input/Output Op Amps OP191/OP291/OP491 FEATURES PIN CONFIGURATIONS Single-supply operation: 2.7 V to 12 V NC 1 8 NC OUTA 1 8 +V Wide input voltage range INA 2 7 +V INA 2 7 OUTB OP291 OP191 Rail-to-rail output swing +INA 3 6 OUTA +INA 3 6 INB V 4 5 NC V 4 5 +INB Low supply current: 300 A/amp Wide bandwidth: 3 MHz NC = NO CONNECT Slew rate: 0.5 V/s Figure 1. 8-Lead Narrow-Body SOIC Figure 2. 8-Lead Narrow-Body SOIC Low offset voltage: 700 V No phase reversal OUTA 1 14 OUTD OUTA 1 14 OUTD INA 2 13 IND INA 2 13 IND - + APPLICATIONS +INA 3 12 +IND +INA 3 12 +IND +V 4 11 V Industrial process control OP491 +V 4 OP491 11 V +INB 5 10 +INC Battery-powered instrumentation +INB 5 10 +INC INB 6 9 INC - + INB 6 9 INC Power supply control and protection OUTB 7 8 OUTC OUTB 7 8 OUTC Telecommunications Remote sensors Figure 3. 14-Lead Narrow-Body SOIC Figure 4. 14-Lead PDIP Low voltage strain gage amplifiers DAC output amplifiers OUTA 1 14 OUTD INA 2 13 IND +INA 3 12 +IND +V 4 11 V OP491 +INB 5 10 +INC INB 6 9 INC OUTB 7 8 OUTC Figure 5. 14-Lead TSSOP GENERAL DESCRIPTION The OP191, OP291, and OP491 are single, dual, and quad The ability to swing rail-to-rail at both the input and output micropower, single-supply, 3 MHz bandwidth amplifiers enables designers to build multistage filters in single-supply featuring rail-to-rail inputs and outputs. All are guaranteed to systems and to maintain high signal-to-noise ratios. operate from a +3 V single supply as well as 5 V dual supplies. The OP191/OP291/OP491 are specified over the extended Fabricated on Analog Devices CBCMOS process, the OPx91 industrial 40C to +125C temperature range. The OP191 family has a unique input stage that allows the input voltage to single and OP291 dual amplifiers are available in 8-lead plastic safely extend 10 V beyond either supply without any phase SOIC surface-mount packages. The OP491 quad is available in a inversion or latch-up. The output voltage swings to within 14-lead PDIP, a narrow 14-lead SOIC package, and a 14-lead millivolts of the supplies and continues to sink or source TSSOP. current all the way to the supplies. Applications for these amplifiers include portable tele- communications equipment, power supply control and protection, and interface for transducers with wide output ranges. Sensors requiring a rail-to-rail input amplifier include Hall effect, piezo electric, and resistive transducers. Rev. E 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 19942010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 00294-001 00294-003 00294-005 00294-002 00294-004 - + - +OP191/OP291/OP491 TABLE OF CONTENTS Features .............................................................................................. 1 Overdrive Recovery ................................................................... 18 Applications ....................................................................................... 1 Applications Information .............................................................. 19 Pin Configurations ........................................................................... 1 Single 3 V Supply, Instrumentation Amplifier ....................... 19 General Description ......................................................................... 1 Single-Supply RTD Amplifier ................................................... 19 Revision History ............................................................................... 2 A 2.5 V Reference from a 3 V Supply ...................................... 20 Specif icat ions ..................................................................................... 3 5 V Only, 12-Bit DAC Swings Rail-to-Rail ............................. 20 Electrical Specifications ............................................................... 3 A High-Side Current Monitor .................................................. 20 Absolute Maximum Ratings ............................................................ 7 A 3 V, Cold Junction Compensated Thermocouple Amplifier ....................................................................................................... 21 Thermal Resistance ...................................................................... 7 Single-Supply, Direct Access Arrangement for Modems ...... 21 ESD Caution .................................................................................. 7 3 V, 50 Hz/60 Hz Active Notch Filter with False Ground ..... 22 Typical Performance Characteristics ............................................. 8 Single-Supply, Half-Wave, and Full-Wave Rectifiers ............. 22 Theory of Operation ...................................................................... 17 Outline Dimensions ....................................................................... 23 Input Overvoltage Protection ................................................... 18 Ordering Guide .......................................................................... 24 Output Voltage Phase Reversal ................................................. 18 REVISION HISTORY 3/04Rev. B to Rev. C. 4/10Rev. D to Rev. E Changes to OP291 SOIC Pin Configuration ................................. 1 Changes to Input Voltage Parameter, Table 4 ............................... 7 11/03Rev. A to Rev. B. 4/06Rev. C to Rev. D Edits to General Description ........................................................... 1 Changes to Noise Performance, Voltage Density, Table 1 ........... 3 Edits to Pin Configuration ............................................................... 1 Changes to Noise Performance, Voltage Density, Table 2 ........... 4 Changes to Ordering Guide ............................................................. 5 Changes to Noise Performance, Voltage Density, Table 3 ........... 5 Updated Outline Dimensions ....................................................... 19 Changes to Figure 23 and Figure 24 ............................................. 10 Changes to Figure 42 ...................................................................... 13 12/02Rev. 0 to Rev. A. Changes to Figure 43 ...................................................................... 14 Edits to General Description ........................................................... 1 Changes to Figure 57 ...................................................................... 16 Edits to Pin Configuration ............................................................... 1 Added Figure 58 .............................................................................. 16 Changes to Ordering Guide ............................................................. 5 Changed Reference from Figure 47 to Figure 12 ........................ 17 Edits to Dice Characteristics ............................................................ 5 Updated Outline Dimensions ....................................................... 23 Changes to Ordering Guide .......................................................... 24 Rev. E Page 2 of 24