AR8609ARU-REEL

Precision Micropower, Low Noise CMOS Rail-to-Rail Input/Output Operational Amplifiers AD8603/AD8607/AD8609 FEATURES Low offset voltage: 50 μV max Low input bias current: 1 pA max Single-supply operation: 1.8 V to 5 V Low noise: 22 nV/√Hz Micropower: 50 μA max Low distortion No phase reversal Unity gain stable PIN CONFIGURATIONS OUT 1 V– 2 +IN 3 AD8603 TOP VIEW (Not to Scale) 5 V+ 4 –IN Figure 1. 5-Lead TSOT-23 (UJ Suffix) OUT A 1 –IN A 2 8 V+ OUT B 04356-002 04356-003 AD8607 TOP VIEW (Not to Scale) 7 6 5 APPLICATIONS Battery-powered instrumentation Multipole filters Sensors Low power ASIC input or output amplifiers +IN A 3 V– 4 –IN B +IN B Figure 2. 8-Lead MSOP (RM Suffix) OUT A 1 8 V+ OUT B GENERAL DESCRIPTION The AD8603/AD8607/AD8609 are single/dual/quad micropower rail-to-rail input and output amplifiers, respectively, that feature very low offset voltage as well as low input voltage and current noise. These amplifiers use a patented trimming technique that achieves superior precision without laser trimming. The parts are fully specified to operate from 1.8 V to 5.0 V single supply or from ±0.9 V to ±2.5 V dual supply. The combination of low offsets, low noise, very low input bias currents, and low power consumption make the AD8603/AD8607/AD8609 especially useful in portable and loop-powered instrumentation. The ability to swing rail-to-rail at both the input and output enables designers to buffer CMOS ADCs, DACs, ASICs, and other wide output swing devices in low power, single-supply systems. The AD8603 is available in a tiny 5-lead TSOT-23 package. The AD8607 is available in 8-lead MSOP and 8-lead SOIC packages. The AD8609 is available in 14-lead TSSOP and 14-lead SOIC packages. –IN A 2 +IN A 3 AD8607 7 6 –IN B TOP VIEW V– 4 (Not to Scale) 5 +IN B Figure 3. 8-Lead SOIC_N (R Suffix) OUT A 1 –IN A 2 14 13 OUT D –IN D +IN D V– +IN C –IN C OUT C 04356-004 +IN A 3 V+ 4 +IN B 5 –IN B 6 OUT B 7 AD8609 TOP VIEW (Not to Scale) 12 11 10 9 8 Figure 4. 14-Lead TSSOP (RU Suffix) OUT A –IN A 1 2 14 OUT D 13 –IN D +IN A 3 V+ 4 +IN B 5 –IN B OUT B 6 7 AD8609 12 +IN D TOP VIEW 11 V– (Not to Scale) 10 +IN C 04356-005 9 8 –IN C OUT C Figure 5. 14-Lead SOIC_N (R Suffix) Rev. B 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 © 2005 Analog Devices, Inc. All rights reserved. 04356-001 AD8603/AD8607/AD8609 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Typical Performance Characteristics ............................................. 6 Applications..................................................................................... 12 No Phase Reversal ...................................................................... 12 Input Overvoltage Protection ................................................... 12 Driving Capacitive Loads.......................................................... 12 Proximity Sensors....................................................................... 13 Composite Amplifiers................................................................ 13 Battery-Powered Applications .................................................. 14 Photodiodes ................................................................................ 14 Outline Dimensions ....................................................................... 15 Ordering Guide .......................................................................... 17 REVISION HISTORY 6/05—Rev. A to Rev. B Updated Figure 49 .......................................................................... 15 Changes to Ordering Guide .......................................................... 17 10/03—Rev. 0 to Rev. A Added AD8607 and AD8609 Parts ..................................Universal Changes to Specifications ................................................................ 3 Changes to Figure 35...................................................................... 10 Added Figure 41.............................................................................. 11 8/03—Revision 0: Initial Version Rev. B | Page 2 of 20 AD8603/AD8607/AD8609 SPECIFICATIONS Electrical Characteristics @ VS = 5 V, VCM = VS/2, TA = 25°C, unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol VOS Conditions VS = 3.3 V @ VCM = 0.5 V and 2.8 V –0.3 V < VCM < +5.2 V –40°C < TA < +125°C, –0.3 V < VCM < +5.2 V –40°C < TA < +125°C –40°C < TA < +85°C –40°C < TA < +125°C Input Offset Current IOS –40°C < TA < +85°C –40°C < TA < +125°C Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain AD8603 AD8607/AD8609 Input Capacitance OUTPUT CHARACTERISTICS Output Voltage High IVR CMRR AVO 0 V < VCM < 5 V –40°C < TA < +125°C RL = 10 kΩ, 0.5 V