AD8603.pdf

1、 Precision Micropower Low Noise CMOS Rail-to-Rail Input/Output Operational Amplifiers AD8603/AD8607/AD8609 FEATURES Low offset voltage:50 V max Low input bias current:1 pA max Single-supply operation:1.8 V to 5 V Low noise:22 nV/Hz Micropower:50 A max Low distortion No phase reversal Unity gain stab

2、le APPLICATIONS Battery-powered instrumentation Multipole filters Sensors Low power ASIC input or output amplifiers GENERAL DESCRIPTION The AD8603/AD8607/AD8609 are,single/dual/quad micro-power rail-to-rail input and output amplifiers,respectively,that features very low offset voltage as well as low

3、 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

4、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

5、single-supply systems.The AD8603 is available in a tiny 5-lead TSOT-23 package.The AD8607 is available in 8-lead MSOP and SOIC packages.The AD8609 is available in 14-lead TSSOP and SOIC packages.PIN CONFIGURATIONS AD8603TOP VIEW(Not to Scale)OUT1V2+IN3V+IN5404356-0-001 Figure 1.5-Lead TSOT-23(UJ Suf

6、fix)IN A+IN AVOUT BIN B+IN BV+1458AD8607OUT A04356-0-045 Figure 2.8-Lead MSOP(RM Suffix)12348765AD8607IN AV+IN AOUT BIN BV+IN BOUT A04356-0-047 Figure 3.8-Lead SOIC(R Suffix)OUT AIN A+IN AV+IN BIN BOUT BIN D+IN DVOUT DIN COUT C+IN C14817AD860904356-0-044 Figure 4.14-Lead TSSOP(RU Suffix)IN A+IN AV+I

7、N BIN BOUT BOUT DIN D+IN DV+IN CIN COUT COUT AAD8609123456714131211109804356-0-046 Figure 5.14-Lead SOIC(R Suffix)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

8、 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 Techn

9、ology Way,P.O.Box 9106,Norwood,MA 02062-9106,U.S.A.Tel:781.329.4700 Fax:781.326.8703 2003 Analog Devices,Inc.All rights reserved.Rev.A AD8603/AD8607/AD8609 TABLE OF CONTENTS Specifications.3 Absolute Maximum Ratings.5 Typical Performance Characteristics.6 Applications.12 No Phase Reversal.12 Input O

10、vervoltage Protection.12 Driving Capacitive Loads.12 Proximity Sensors.13 Composite Amplifiers.13 Battery-Powered Applications.14 Photodiodes.14 Outline Dimensions.15 Ordering Guide.16 REVISION HISTORY 10/03Data Sheet Changed from Rev.0 to Rev.A Change Page Added AD8607 and AD8609 parts.Universal Ch

11、anges to Specifications.3 Changes to Figure 35.10 Added Figure 41.11 Rev.A|Page 2 of 16 AD8603/AD8607/AD8609 SPECIFICATIONS Table 1.Electrical Characteristics VS=5 V,VCM=VS/2,TA=25C,unless otherwise noted Parameter Symbol Conditions Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage VOS VS=3.3 V

12、VCM=0.5 V and 2.8 V 12 50 V 0.3 V VCM +5.2 V 40 300 V 40C TA +125C,0.3 V VCM +5.2 V 700 V Offset Voltage Drift VOS/T 40C TA +125C 1 4.5 V/C Input Bias Current IB 0.2 1 pA 40C TA +85C 50 pA 40C TA +125C 500 pA Input Offset Current IOS 0.1 0.5 pA 40C TA +85C 50 pA 40C TA +125C 250 pA Input Voltage Ran

13、ge IVR 0.3 +5.2 V Common-Mode Rejection Ratio CMRR 0 V VCM 5 V 85 100 dB 40C TA +125C 80 dB Large Signal Voltage Gain AVO RL=10 k,0.5 V VO 4.5 V AD8603 400 1000 V/mV AD8607/AD8609 250 450 V/mV Input Capacitance CDIFF 1.9 pF CCM 2.5 pF OUTPUT CHARACTERISTICS Output Voltage High VOH IL=1 mA 4.95 4.97

14、V 40C to+125C 4.9 V IL=10 mA 4.65 4.97 V 40C to+125C 4.50 V Output Voltage Low VOL IL=1 mA 16 30 mV 40C to+125C 50 mV IL=10 mA 160 250 mV 40C to+125C 330 mV Output Current IOUT 80 mA Closed-Loop Output Impedance ZOUT f=10 kHz,AV=1 36 POWER SUPPLY Power Supply Rejection Ratio PSRR 1.8 V VS 5 V 80 100

15、 dB Supply Current/Amplifier ISY VO=0 V 40 50 A 40C TA +125C 60 A DYNAMIC PERFORMANCE Slew Rate SR RL=10 k 0.1 V/s Settling Time 0.1%tS G=1,2 V Step 23 s Gain Bandwidth Product GBP RL=100 k 400 kHz RL=10 k 316 kHz Phase Margin O RL=10 k,RL=100 k 70 Degrees NOISE PERFORMANCE Peak-to-Peak Noise en p-p

16、 0.1 Hz to 10 Hz 2.3 3.5 V Voltage Noise Density en f=1 kHz 25 nV/Hz f=10 kHz 22 nV/Hz Current Noise Density in f=1 kHz 0.05 pA/Hz Channel Separation Cs f=10 kHz 115 dB f=100 kHz 110 dB Rev.A|Page 3 of 16 AD8603/AD8607/AD8609 Table 2.Electrical Characteristics VS=1.8 V,VCM=VS/2,TA=25C,unless otherwise noted Parameter Symbol Conditions Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage VOS VS=3.3 V VCM=0.5 V and 2.8 V 12 50 V 0.3 V VCM +1.8 V 40 300 V 40C TA +85C,0.3 V VCM +1.8 V 500 V 40C TA