Low Power, Rail-to-Rail Output, Precision JFET Amplifiers Data Sheet AD8641/AD8642/AD8643 FEATURES PIN CONFIGURATIONS Low supply current: 250 A max OUT 1 5 VCC Very low input bias current: 1 pA max AD8641 VEE 2 TOP VIEW Low offset voltage: 750 V max (Not to Scale) +IN 3 Single-supply operation: 5 V to 26 V 4 IN Dual-supply operation: 2.5 V to 13 V Figure 1. 5-Lead SC70 (KS-5) Rail-to-rail output Unity-gain stable NIC 1 8 NIC No phase reversal 2 AD8641 7 IN VCC TOP VIEW SC70 package +IN 3 6 OUT (Not to Scale) VEE 4 5 NIC APPLICATIONS NIC = NO INTERNAL CONNECTION. Line-/battery-powered instruments Figure 2. 8-Lead SOIC (R-8) Photodiode amplifiers Precision current sensing OUT A 1 8 V+ AD8642 IN A 2 7 OUT B Medical instrumentation TOP VIEW +IN A 3 6 IN B Industrial controls (Not to Scale) V 4 5 +IN B Precision filters Portable audio Figure 3. 8-Lead SOIC (R-8) ATE OUT A 1 8 V+ AD8642 IN A 2 7 OUT B GENERAL DESCRIPTION TOP VIEW +IN A 3 6 IN B (Not to Scale) The AD8641/AD8642/AD8643 are low power, precision JFET V 4 5 +IN B input amplifiers featuring extremely low input bias current and Figure 4. 8-Lead MSOP (RM-8) rail-to-rail output. The ability to swing nearly rail-to-rail at the input and rail-to-rail at the output enables designers to buffer OUT A 1 14 OUT D complementary metal-oxide semiconductor digital-to-analog IN A 2 13 IN D +IN A 3 12 +IN D converters (CMOS DACs), ASICs, and other wide output swing AD8643 TOP VIEW V+ 4 11 V devices in single-supply systems. The outputs remain stable (Not to Scale) +IN B 5 10 +IN C with capacitive loads of more than 500 pF. IN B 6 9 IN C The AD8641/AD8642/AD8643 are suitable for applications OUT B 7 8 OUT C utilizing multichannel boards that require low power to manage Figure 5. 14-Lead SOIC (R-14) heat. Other applications include photodiodes, ATE reference level drivers, battery management, and industrial controls. PIN 1 INDICATOR The AD8641/AD8642/AD8643 are fully specified over the extended industrial temperature range of 40C to +125C. The AD8641 is available in 5-lead SC70 and 8-lead SOIC lead-free IN A 1 12 IN D +IN A 2 11 +IN D packages. The AD8642 is available in 8-lead MSOP and 8-lead AD8643 TOP VIEW V+ 3 10 V SOIC lead-free packages. The AD8643 is available in 14-lead +IN B 4 9 +IN C SOIC and 16-lead, 3 mm 3 mm, LFCSP lead-free packages. NOTES 1. NIC = NO INTERNAL CONNECTION. 2. EXPOSED PAD SHOULD BE CONNECTED TO V+. Figure 6. 16-Lead LFCSP (CP-16-27) (Not Drawn to Scale) Rev. F Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20042016 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. NIC IN B OUT B OUT A OUT D OUT C IN C NIC 05072-101 05072-064 05072-102 05072-105 05072-103 05072-104 5 16 6 15 7 14 8 13AD8641/AD8642/AD8643 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Absolute Maximum Ratings ............................................................5 Applications ....................................................................................... 1 Thermal Resistance .......................................................................5 General Description ......................................................................... 1 ESD Caution...................................................................................5 Pin Configurations ........................................................................... 1 Typical Performance Characteristics ..............................................6 Revision History ............................................................................... 2 Outline Dimensions ....................................................................... 13 Specifications ..................................................................................... 3 Ordering Guide .......................................................................... 14 Electrical Characteristics ............................................................. 3 REVISION HISTORY 4/16Rev. E to Rev. F 3/05Rev. 0 to Rev. A Changed CP-16-3 to CP-16-27 .................................... Throughout Added AD8642 ................................................................... Universal Changes to Figure 2 and Figure 6 ................................................... 1 Changes to General Description ..................................................... 1 Updated Outline Dimensions ....................................................... 13 Added Figure 3 and Figure 4 ............................................................ 1 Changes to Ordering Guide .......................................................... 14 Changes to Specifications ................................................................. 3 Changes to Absolute Maximum Ratings ........................................ 5 9/11Rev. D to Rev. E Changes to Figure 22 ......................................................................... 8 Changes to Thermal Resistance Section ........................................ 5 Changes to Figure 23 ......................................................................... 9 Changes to Figure 41 ...................................................................... 12 7/11Rev. C to Rev. D Updated Outline Dimensions ....................................................... 13 Changes to Figure 6 .......................................................................... 1 Changes to Ordering Guide .......................................................... 14 11/10Rev. B to Rev. C 10/04Initial Version: Revision 0 Changes to Figure 6 .......................................................................... 1 Added Thermal Resistance Section and Table 4 .......................... 5 Updated Outline Dimensions ....................................................... 13 Changes to Ordering Guide .......................................................... 15 4/05Rev. A to Rev. B Added AD8643 ................................................................... Universal Added 14-Lead SOIC ......................................................... Universal Added 16-Lead LFCSP ....................................................... Universal Updated Outline Dimensions ....................................................... 13 Changes to Ordering Guide .......................................................... 14 Rev. F Page 2 of 15