Wideband, Unity-Gain Stable, Fast Settling Op Amp Data Sheet AD841 FEATURES CONNECTION DIAGRAMS AC performance NC 1 14 NC Unity-gain bandwidth: 40 MHz NC 2 AD841 13 NC BALANCE 3 12 BALANCE Fast settling time: 110 ns to 0.01% INPUT 4 11 +V S Slew rate: 300 V/s +INPUT 5 10 OUTPUT Full power bandwidth: 4.7 MHz for 20 V p-p into a 500 load V 6 9 NC S TOP VIEW DC performance (Not to Scale) NC 7 8 NC Input offset voltage: 1 mV maximum NOTES Input voltage noise: 15 nV/Hz typical 1. NC = NO CONNECT. Open-loop gain: 45 V/mV into a 1 k load Figure 1. PDIP (N-14) Package and CERDIP (Q-14) Package Output current: 50 mA minimum Supply current: 12 mA maximum APPLICATIONS High speed signal conditioning 3 2 1 20 19 Video and pulse amplifiers 18 NC 4 NC Data acquisition systems 17 INPUT 5 +V S Line drivers NC 6 16 NC Active filters 7 15 +INPUT OUTPUT 8 14 Available in 14-pin plastic PDIP, 14-pin hermetic CERDIP, and NC NC AD841 20-pin LCC packages 9 10 11 12 13 Chips and MIL-STD-883B parts available NOTES 1. NC = NO CONNECT. Figure 2. LCC (E-20-1) Package GENERAL DESCRIPTION The AD841 is a member of the Analog Devices, Inc., family of use in high frequency signal conditioning circuits and wide wide bandwidth operational amplifiers. This high speed/high bandwidth active filters. The extremely rapid settling time of precision family includes the AD842, which is stable at a gain of the AD841 makes it the preferred choice for data acquisition two or greater and has 100 mA minimum output current drive. applications that require 12-bit accuracy. The AD841 is also These devices are fabricated using Analog Devices junction appropriate for other applications such as high speed DAC and isolated complementary bipolar (CB) process. This process ADC buffer amplifiers and other wide bandwidth circuitry. permits a combination of dc precision and wideband ac perfor- PRODUCT HIGHLIGHTS mance previously unobtainable in a monolithic op amp. In 1. The high slew rate and fast settling time of the AD841 addition to its 40 MHz unity-gain bandwidth product, the make it ideal for DAC and ADC buffers, and all types of AD841 offers extremely fast settling characteristics, typically video instrumentation circuitry. settling to within 0.01% of final value in 110 ns for a 10 V step. 2. The AD841 is a precision amplifier. It offers accuracy to Unlike many high frequency amplifiers, the AD841 requires no 0.01% or better and wide bandwidth performance external compensation. It remains stable over its full operating previously available only in hybrids. temperature range. It also offers a low quiescent current of 3. The AD841s thermally balanced layout and the speed of 12 mA maximum, a minimum output current drive capability the CB process allow the AD841 to settle to 0.01% in 110 ns of 50 mA, a low input voltage noise of 15 nV/Hz, and low without the long tails that occur with other fast op amps. input offset voltage of 1 mV maximum. 4. Laser wafer trimming reduces the input offset voltage to The 300 V/s slew rate of the AD841, along with its 40 MHz 1 mV maximum on the K grade, thus eliminating the need gain bandwidth, ensures excellent performance in video and for external offset nulling in many applications. Offset null pulse amplifier applications. This amplifier is well suited for pins are provided for additional versatility. Rev. C 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 2013 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 NC NC V OFFSET NULL S NC NC NC OFFSET NULL NC NC 11340-001 11340-002AD841 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 10 Applications ....................................................................................... 1 Offset Nulling ............................................................................. 10 Connection Diagrams ...................................................................... 1 Input Considerations ................................................................. 10 General Description ......................................................................... 1 AD841 Settling Time ................................................................. 10 Product Highlights ........................................................................... 1 Grounding and Bypassing ......................................................... 11 Revision History ............................................................................... 2 Capacitive Load Driving Ability ............................................... 11 Specifications ..................................................................................... 3 Terminated Line Driver ............................................................. 12 Absolute Maximum Ratings ............................................................ 5 Overdrive Recovery ................................................................... 12 Thermal Characteristics .............................................................. 5 Outline Dimensions ....................................................................... 13 ESD Caution .................................................................................. 5 Ordering Guide .......................................................................... 14 Typical Performance Characteristics ............................................. 6 REVISION HISTORY 2/13Rev. B to Rev. C Removed TO-8 Package..................................................... Universal Changed Input Voltage Noise 13 nV/Hz to 15 nV/Hz and Changes to General Description Section ...................................... 1 Changes to Endnote 1, Table 1 ........................................................ 4 Added Operating Temperature Range, Table 2 ............................ 5 Deleted Using a Heat Sink Section ............................................... 11 Updated Outline Dimensions ....................................................... 13 Added Ordering Guide .................................................................. 14 11/88Rev. A to Rev. B Rev. C Page 2 of 16