AD8608

Precision, Low Noise, CMOS, Rail-to-Rail, Input/Output Operational Amplifiers AD8605/AD8606/AD8608 FEATURES Low offset voltage: 65 μV maximum Low input bias currents: 1 pA maximum Low noise: 8 nV/√Hz Wide bandwidth: 10 MHZ High open-loop gain: 1000 V/mV Unity gain stable Single-supply operation: 2.7 V to 5.5 V 5-ball WLCSP for single (AD8605) and 8-ball WLCSP for dual (AD8606) FUNCTIONAL BLOCK DIAGRAMS BALL A1 CORNER OUTA A1 V+ A2 OUTB A3 –INA B1 –INB B3 +INA OUT 1 V– 2 V– C2 +INB 02731-057 AD8605 TOP VIEW (Not to Scale) 5 V+ C1 C3 +IN 3 4 –IN 02731-001 APPLICATIONS Photodiode amplification Battery-powered instrumentation Multipole filters Sensors Barcode scanners Audio AD8606 TOP VIEW (BALL SIDE DOWN) Figure 1. 5-Lead SOT-23 (RJ Suffix) TOP VIEW (BUMP SIDE DOWN) OUT 1 V– 2 +IN 3 –IN 02731-006 Figure 2. 8-Ball WLCSP (CB Suffix) OUT A 1 –IN A 2 +IN A 3 V+ 4 +IN B 5 –IN B 6 OUT B 7 14 OUT D 13 –IN D V+ 5 AD8608 TOP VIEW (Not to Scale) 12 +IN D 11 V– 10 +IN C 02731-004 GENERAL DESCRIPTION The AD8605, AD8606, and AD8608 1 are single, dual, and quad rail-to-rail input and output, single-supply amplifiers. They feature very low offset voltage, low input voltage and current noise, and wide signal bandwidth. They use the Analog Devices, Inc. patented DigiTrim® trimming technique, which achieves superior precision without laser trimming. The combination of low offsets, low noise, very low input bias currents, and high speed makes these amplifiers useful in a wide variety of applications. Filters, integrators, photodiode amplifiers, and high impedance sensors all benefit from the combination of performance features. Audio and other ac applications benefit from the wide bandwidth and low distortion. Applications for these amplifiers include optical control loops, portable and loop-powered instrumentation, and audio amplification for portable devices. The AD8605, AD8606, and AD8608 are specified over the extended industrial temperature range (−40°C to +125°C). The AD8605 single is available in 5-lead SOT-23 and 5-ball WLCSP packages. The AD8606 dual is available in an 8-lead MSOP, an 8-ball WLSCP, and a narrow SOIC surface-mounted package. The AD8608 quad is available in a 14-lead TSSOP package and a narrow 14-lead SOIC package. The 5-ball and 8-ball WLCSP offer the smallest available footprint for any surface-mounted operational amplifier. The WLCSP, SOT-23, MSOP, and TSSOP versions are available in tape-and-reel only. 1 4 9 –IN C 8 OUT C AD8605 ONLY Figure 3. 5-Ball WLCSP (CB Suffix) Figure 4. 14-Lead SOIC_N (R Suffix) OUT A –IN A +IN A V+ +IN B –IN B OUT B 1 14 OUT D –IN D +IN D V– +IN C –IN C OUT C 7 8 Figure 5. 8-Lead MSOP (RM Suffix), 8-Lead SOIC_N (R Suffix) Figure 6. 14-Lead TSSOP (RU Suffix) Protected by U.S. Patent No. 5,969,657; other patents pending. Rev. H 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 ©2002–2008 Analog Devices, Inc. All rights reserved. 02731-002 OUT A –IN A +IN A V– 1 AD8606 8 TOP VIEW (Not to Scale) 4 5 V+ OUT B –IN B +IN B AD8608 TOP VIEW (Not to Scale) 02731-003 AD8605/AD8606/AD8608 TABLE OF CONTENTS Features .............................................................................................. 1  Applications ....................................................................................... 1  General Description ......................................................................... 1  Functional Block Diagrams ............................................................. 1  Revision History ............................................................................... 3  5 V Electrical Specifications ............................................................ 4  2.7 V Electrical Specifications ......................................................... 6  Absolute Maximum Ratings............................................................ 8  ESD Caution .................................................................................. 8  Typical Performance Characteristics ............................................. 9  Applications Information .............................................................. 15  Output Phase Reversal ............................................................... 15  Maximum Power Dissipation ................................................... 15  Input Overvoltage Protection ................................................... 15  THD + Noise ............................................................................... 15  Total Noise Including Source Resistors ................................... 16  Channel Separation .................................................................... 16  Capacitive Load Drive ............................................................... 16  Light Sensitivity .......................................................................... 17  WLCSP Assembly Considerations ........................................... 17  I-V Conversion Applications ........................................................ 18  Photodiode Preamplifier Applications .................................... 18  Audio and PDA Applications ................................................... 18  Instrumentation Amplifiers ...................................................... 19  DAC Conversion ........................................................................ 19  Outline Dimensions ....................................................................... 20  Ordering Guide .......................................................................... 22  Rev. H | Page 2 of 24 AD8605/AD8606/AD8608 REVISION HISTORY 2/08—Rev. G to Rev. H Changes to Features ..................................................................... 1 Changes to Table 1 ....................................................................... 4 Changes to Table 2 ....................................................................... 6 Changes to Figure 11 ................................................................... 9 Changes to Figure 13, Figure 14, and Figure 16 Captions .... 10 Changes to Figure 15, Figure 17, and Figure 18 ..................... 10 Changes to Figure 34 and Figure 35 Captions........................ 13 Changes to Figure 36 ................................................................. 13 Changes to Figure 37 Caption .................................................. 14 Changes to Figure 38 and Figure 41 ........................................ 14 Changes to Figure 45 ................................................................. 15 Changes to Audio and PDA Applications Section ................. 18 Changes to Figure 52 ................................................................. 18 Changes to Ordering Guide ...................................................... 22 10/07—Rev. F to Rev. G Changes to Figure 2...................................................................... 1 Updated Outline Dimensions ................................................... 20 8/07—Rev. E to Rev. F Added 8-Ball WLCSP Package ..................................... Universal Changes to Features ..................................................................... 1 Changes to Table 1 ....................................................................... 3 Changes to Table 2 ....................................................................... 5 Changes to Table 4 ....................................................................... 7 Updated Outline Dimensions ................................................... 19 Changes to Ordering Guide ...................................................... 21 1/06—Rev. D to Rev. E Changes to Table 1 ....................................................................... 3 Changes to Table 2 ....................................................................... 5 Changes to Table 4 ....................................................................... 6 Changes to Figure 12 Caption .................................................... 8 Changes to Figure 26 and Figure 27 Captions........................ 11 Changes to Figure 33 Caption .................................................. 12 Changes to Figure 44 ................................................................. 14 Updated Outline Dimensions ................................................... 19 Changes to Ordering Guide ...................................................... 20 5/04—Rev. C to Rev. D Updated Format.............................................................. Universal Edit to Light Sensitivity Section ............................................... 16 Updated Outline Dimensions................................................... 19 Changes to Ordering Guide ...................................................... 20 7/03—Rev. B to Rev. C Changes to Features .......................................................................1 Change to General Description....................................................1 Addition to Functional Block Diagrams .....................................1 Addition to Absolute Maximum Ratings ....................................4 Addition to Ordering Guide .........................................................4 Change to Equation in Maximum Power Dissipation Section .......................................................................................... 11 Added Light Sensitivity Section ................................................ 12 Added New Figure 8; Renumbered Subsequently .................. 13 Added New MicroCSP Assembly Considerations Section.... 13 Changes to Figure 9 .................................................................... 13 Change to Equation in Photodiode Preamplifier Applications Section .................................................................. 13 Changes to Figure 12 .................................................................. 14 Change to Equation in D/A Conversion Section.................... 14 Updated Outline Dimensions ................................................... 15 3/03—Rev. A to Rev. B Changes to Functional Block Diagram .......................................1 Changes to Absolute Maximum Ratings.....................................4 Changes to Ordering Guide ........................................................ 4 Changes to Figure 9 ................................................................... 13 Updated Outline Dimensions.................................................... 15 11/02—Rev. 0 to Rev. A Change to Electrical Characteristics............................................2 Changes to Absolute Maximum Ratings.....................................4 Changes to Ordering Guide .........................................................4 Change to TPC 6 ...........................................................................5 Updated Outline Dimensions.................................................... 15 5/02—Revision 0: Initial Version Rev. H | Page 3 of 24 AD8605/AD8606/AD8608 5 V ELECTRICAL SPECIFICATIONS VS = 5 V, VCM = VS/2, TA = 25°C, unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage AD8605/AD8606 (Except WLCSP) AD8608 AD8605/AD8606/AD8608 Input Bias Current AD8605/AD8606 AD8605/AD8606 AD8608 AD8608 Input Offset Current Symbol VOS VS = 3.5 V, VCM = 3 V VS = 3.5 V, VCM = 2.7 V VS = 5 V, VCM = 0 V to 5 V −40°C < TA < +125°C IB −40°C < TA < +85°C −40°C < TA < +125°C −40°C < TA < +85°C −40°C < TA < +125°C IOS −40°C < TA < +85°C −40°C < TA < +125°C Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift AD8605/AD8606 AD8608 INPUT CAPACITANCE Common-Mode Input Capacitance Differential Input Capacitance OUTPUT CHARACTERISTICS Output Voltage High CMRR AVO ΔVOS/ΔT ΔVOS/ΔT CCOM CDIFF VOH I L = 1 mA IL = 10 mA −40°C < TA < +125°C I L = 1 mA IL= 10 mA −40°C < TA < +125°C f = 1 MHz, AV = 1 4.96 4.7 4.6 VCM = 0 V to 5 V −40°C < TA < +125°C RL = 2 kΩ, VO = 0.5 V to 4.5 V −40°C < TA < +125°C −40°C < TA < +125°C 0 85 75 300 100 90 1000 1 1.5 8.8 2.6 4.98 4.79 20 170 ±80 1 40 210 290 4.5 6.0 0.1 20 20 80 0.2 65 75 300 750 1 50 250 100 300 0.5 20 75 5 μV μV μV μV pA pA pA pA pA pA pA pA V dB dB V/mV μV/°C μV/°C pF pF V V V mV mV mV mA Ω Conditions Min Typ Max Unit Output Voltage Low VOL Output Current Closed-Loop Output Impedance POWER SUPPLY Power Supply Rejection Ratio AD8605/AD8606 AD8605/AD8606 WLCSP AD8608 Supply Current/Amplifier DYNAMIC PERFORMANCE Slew Rate Settling Time Unity Gain Bandwidth Product Phase Margin IOUT ZOUT PSRR ISY VS = 2.7 V to 5.5 V VS = 2.7 V to 5.5 V VS = 2.7 V to 5.5 V −40°C < TA < +125°C IOUT = 0 mA −40°C < TA < +125°C RL = 2 kΩ, CL = 16 pF To 0.01%, 0 V to 2 V step, AV = 1 80 75 77 70 95 92 92 90 1 1.2 1.4 dB dB dB dB mA mA V/μs μs MHz Degrees SR tS GBP ΦM 5