Low Cost, General-Purpose High Speed JFET Amplifier Data Sheet AD825 FEATURES CONNECTION DIAGRAMS High speed NC 1 8 NC AD825 IN 2 7 +V 41 MHz, 3 dB bandwidth S TOP VIEW +IN 3 6 OUTPUT 125 V/s slew rate (Not to Scale) V 4 5 NC S 80 ns settling time NC = NO CONNECT Input bias current of 20 pA and noise current of 10 fA/Hz Input voltage noise of 12 nV/Hz Figure 1. 8-Lead Plastic SOIC (R-8) Package Fully specified power supplies: 5 V to 15 V Low distortion: 76 dB at 1 MHz NC 1 16 NC High output drive capability NC 2 15 NC Drives unlimited capacitance load NC 3 14 NC AD825 50 mA min output current INPUT 4 13 +V S TOP VIEW +INPUT 5 12 OUTPUT No phase reversal when input is at rail (Not to Scale) 6 11 V NC S Available in 8-lead SOIC NC 7 10 NC NC 8 9 NC APPLICATIONS NC = NO CONNECT CCDs Low distortion filters Figure 2. 16-Lead Plastic SOIC (RW-16) Package Mixed gain stages Audio amplifiers Photo detector interfaces ADC input buffers DAC output buffers GENERAL DESCRIPTION The AD825 is a superbly optimized operational amplifier for 10V 200ns high speed, low cost, and dc parameters, making it ideally suited for a broad range of signal conditioning and data acquisition applications. The ac performance, gain, bandwidth, slew rate, and drive capability are all very stable over temperature. The AD825 also maintains stable gain under varying load conditions. The unique input stage has ultralow input bias current and input current noise. Signals that go to either rail on this high performance input do not cause phase reversals at the output. These features make the AD825 a good choice as a buffer for 10V MUX outputs, creating minimal offset and gain errors. Figure 3. Performance with Rail-to-Rail Input Signals The AD825 is fully specified for operation with dual 5 V and 15 V supplies. This power supply flexibility, and the low supply current of 6.5 mA with excellent ac characteristics under all supply conditions, makes the AD825 well-suited for many demanding applications. Rev. G 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 2014 Analog Devices, Inc. All rights reserved. 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. Technical Support www.analog.com 00876-E-001 00876-E-002 00876-E-003AD825 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................6 Applications ....................................................................................... 1 Driving Capacitive Loads .............................................................. 10 Connection Diagrams ...................................................................... 1 Theory of Operation ...................................................................... 10 General Description ......................................................................... 1 Input Consideration ................................................................... 10 Revision History ............................................................................... 2 Grounding and Bypassing ......................................................... 10 Specifications ..................................................................................... 3 Second-Order Low-Pass Filter ................................................. 11 Absolute Maximum Ratings ............................................................ 5 Outline Dimensions ....................................................................... 12 Pin Configurations ........................................................................... 5 Ordering Guide .......................................................................... 12 ESD Caution .................................................................................. 5 REVISION HISTORY 2/01Data Sheet Changed from Rev. C to Rev. D 4/14Rev. F to Rev. G Addition of 16-lead SOIC package (R-16) Updated Outline Dimensions ....................................................... 12 Connection Diagram ........................................................................ 4 Changes to Ordering Guide .......................................................... 12 Addition to Absolute Maximum Ratings ....................................... 4 10/04Data Sheet Changed from Rev. E to Rev. F Addition to Ordering Guide (R-16) ................................................ 4 Changes to Figure 1 .......................................................................... 1 Addition of 16-lead SOIC package (R-16) Changes to Figure 4 .......................................................................... 5 Outline Dimensions ....................................................................... 11 Changes to Figure 21 ........................................................................ 8 3/04Data Sheet Changed from Rev. D to Rev. E Changes to Specifications ................................................................ 3 Addition of 16-Lead SOIC Pin Configuration ............................. 5 Changes to Figure 27 ........................................................................ 9 Updated Outline Dimensions ....................................................... 12 Updated Ordering Guide ............................................................... 12 Rev. G Page 2 of 12