OP481GRU-REEL

Ultralow Power, Rail-to-Rail Output Operational Amplifiers OP281/OP481 OUT A 1 –IN A 2 TOP VIEW +IN A 3 (Not to Scale) V– 4 Fabricated on Analog Devices’ CBCMOS process, the OP281/OP481 feature a precision bipolar input and an output that swings to within millivolts of the supplies, continuing to sink or source current up to a voltage equal to the supply voltage. Applications for these amplifiers include safety monitoring, portable equipment, battery and power supply control, and signal conditioning and interfacing for transducers in very low power systems. The output’s ability to swing rail-to-rail and not increase supply current when the output is driven to a supply voltage enables the OP281/OP481 to be used as comparators in very low power systems. This is enhanced by their fast saturation recovery time. Propagation delays are 250 μs. The OP281/OP481 are specified over the extended industrial temperature range (−40°C to +85°C). The OP281 dual amplifier is available in 8-lead SOIC surface-mount and TSSOP packages. The OP481 quad amplifier is available in narrow 14-lead SOIC and TSSOP packages. V+ 7 OUT B 6 –IN B 5 +IN B 1 8 V+ –IN A 2 OP281 7 OUT B +IN A 3 TOP VIEW (Not to Scale) 6 –IN B V– 4 5 +IN B 00291-002 OUT A Figure 2. 8-Lead TSSOP (RU Suffix) GENERAL DESCRIPTION The OP281 and OP481 are dual and quad ultralow power single-supply amplifiers featuring rail-to-rail outputs. Each operates from supplies as low as 2.0 V and is specified at +3 V and +5 V single supplies as well as ±5 V dual supplies. 8 Figure 1. 8-Lead Narrow-Body SOIC (R Suffix) APPLICATIONS Comparator Battery-powered instrumentation Safety monitoring Remote sensors Low voltage strain gage amplifiers OP281 00291-001 PIN CONFIGURATIONS OUT A 1 14 OUT D –IN A 2 13 –IN D 12 +IN D +IN A 3 OP481 11 V– TOP VIEW (Not to Scale) 10 +IN C +IN B 5 V+ 4 –IN B 6 9 –IN C OUT B 7 8 OUT C 00291-003 Low supply current: 4 μA/amplifier maximum Single-supply operation: 2.7 V to 12 V Wide input voltage range Rail-to-rail output swing Low offset voltage: 1.5 mV No phase reversal Figure 3. 14-Lead Narrow-Body SOIC (R Suffix) OUT A 1 14 OUT D –IN A 2 13 –IN D +IN A 3 V+ 4 +IN B 5 10 +IN C –IN B 6 9 –IN C OUT B 7 8 OUT C OP481 +IN D TOP VIEW 11 V– (Not to Scale) 12 00291-004 FEATURES Figure 4. 14-Lead TSSOP (RU Suffix) Rev. D 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 rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©1996–2008 Analog Devices, Inc. All rights reserved. OP281/OP481 TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation .................................................................. 13 Applications ....................................................................................... 1 Input Overvoltage Protection ................................................... 13 Pin Configurations ........................................................................... 1 Input Offset Voltage ................................................................... 13 General Description ......................................................................... 1 Input Common-Mode Voltage Range ..................................... 13 Revision History ............................................................................... 2 Capacitive Loading..................................................................... 14 Specifications..................................................................................... 3 Micropower Reference Voltage Generator.............................. 14 Electrical Specifications ............................................................... 3 Window Comparator ................................................................. 14 Absolute Maximum Ratings............................................................ 6 Low-Side Current Monitor ....................................................... 15 Thermal Resistance ...................................................................... 6 Low Voltage Half-Wave and Full-Wave Rectifiers ................. 15 ESD Caution .................................................................................. 6 Battery-Powered Telephone Headset Amplifier..................... 15 Typical Performance Characteristics ............................................. 7 Outline Dimensions ....................................................................... 17 Applications ..................................................................................... 13 Ordering Guide .......................................................................... 18 REVISION HISTORY 9/08—Rev. C to Rev. D 2/03—Rev. 0 to Rev. A Changes to Figure 40 ...................................................................... 14 Changes to Low-Side Current Monitor Section ......................... 15 Changes to Figure 42 ...................................................................... 15 Updated Format .................................................................. Universal Deleted OP181 .................................................................... Universal Updated Package Options ................................................. Universal Deleted OP181 Pin Configurations ................................................1 Deleted Epoxy DIP Pin Configurations .........................................1 Changes to Absolute Maximum Ratings ........................................5 Changes to Ordering Guide .............................................................5 Changes to Input Offset Voltage................................................... 10 Deleted Former Figure 33 ............................................................. 10 Deleted Overdrive Recovery Time Section ................................. 11 Deleted Former Figure 36 ............................................................. 11 Deleted 8-Lead and 14-Lead Plastic DIP (N-8 and N-14) Outline Dimensions ....................................................................... 14 Updated Outline Dimensions ....................................................... 14 10/07—Rev. B to Rev. C Updated Format .................................................................. Universal Changes to Offset Voltage Drift Condition .................................. 3 Changes to Slew Rate Symbol ......................................................... 5 Changes to Figure 8 .......................................................................... 7 Deleted SPICE Macro-Model Section ......................................... 13 Updated Outline Dimensions ....................................................... 17 Changes to Ordering Guide .......................................................... 18 3/03—Rev. A to Rev. B Changes to Features.......................................................................... 1 Rev. D | Page 2 of 20 OP281/OP481 SPECIFICATIONS ELECTRICAL SPECIFICATIONS VS = 3.0 V, VCM = 1.5 V, TA = 25°C, unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage 1 Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large-Signal Voltage Gain Symbol Condition Min Typ VOS IB IOS CMRR AVO VCM = 0 V to 2.0 V, −40°C ≤ TA ≤ +85°C RL = 1 MΩ, VO = 0.3 V to 2.7 V −40°C ≤ TA ≤ +85°C −40°C to +85°C 3 0.1 0 65 5 2 Unit 1.5 2.5 10 7 2 mV mV nA nA V dB V/mV V/mV μV/°C pA/°C pA/°C 95 13 Offset Voltage Drift Bias Current Drift Offset Current Drift OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short-Circuit Limit VOH VOL ISC RL = 100 kΩ to GND, −40°C ≤ TA ≤ +85°C RL = 100 kΩ to V+, −40°C ≤ TA ≤ +85°C 2.925 POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier PSRR ISY VS = 2.7 V to 12 V, −40°C ≤ TA ≤ +85°C VO = 0 V −40°C ≤ TA ≤ +85°C 76 SR RL = 100 kΩ, CL = 50 pF AV = 1, VO = 1 V AV = 20, VO = 1 V 25 40 50 65 95 70 V/ms μs μs μs kHz Degrees 0.1 Hz to 10 Hz f = 1 kHz 10 75