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Precision Micropower Low Noise CMOS Railto-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
5
V+
AD8603
V– 2 +IN 3
4
–IN
Figure 1. 5-Lead TSOT-23 (UJ Suffix)
APPLICATIONS
Battery-powered instrumentation Multipole filters Sensors Low power ASIC input or output amplifiers
AD8607
4 5
Figure 2. 8-Lead MSOP (RM Suffix)
GENERAL DESCRIPTION
The AD8603/AD8607/AD8609 are, single/dual/quad micropower rail-to-rail input and output amplifiers, respectively, that features 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 SOIC packages. The AD8609 is available in 14-lead TSSOP and SOIC packages.
OUT A 1 –IN A 2 +IN A 3 V– 4
8 V+
04356-0-047
04356-0-046
04356-0-044
AD8607
7 OUT B 6 –IN B 5 +IN B
Figure 3. 8-Lead SOIC (R Suffix)
OUT A –IN A +IN A V+ +IN B –IN B OUT B
1
14
AD8609
7 8
OUT D –IN D +IN D V– +IN C –IN C OUT C
Figure 4. 14-Lead TSSOP (RU Suffix)
OUT A 1
14 OUT D 13 –IN D 12 +IN D
–IN A 2
+IN A 3 V+ 4 +IN B 5 –IN B 6 OUT B 7
AD8609
11 V– 10 +IN C 9 –IN C 8 OUT C
Figure 5. 14-Lead SOIC (R Suffix)
Rev. A
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04356-0-045
OUT A –IN A +IN A V–
1
8
V+ OUT B –IN B +IN B
04356-0-001
TOP VIEW (Not to Scale)
AD8603/AD8607/AD8609 TABLE OF CONTENTS
Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 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 .......................................................................... 16
REVISION HISTORY
10/03—Data Sheet Changed from Rev. 0 to Rev. A Change Page
Added AD8607 and AD8609 parts ..............................Universal Changes 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 = 25°C, unless otherwise noted
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 Hig.