Precision, Very Low Noise, Low Input Bias Current Operational Amplifiers Data Sheet AD8671/AD8672/AD8674 FEATURES PIN CONFIGURATIONS Very low noise: 2.8 nV/Hz, 77 nV p-p NC 1 8 NC Wide bandwidth: 10 MHz AD8671 IN 2 7 V+ TOP VIEW Low input bias current: 12 nA max +IN 3 6 OUT (Not to Scale) V 4 5 NC Low offset voltage: 75 V max High open-loop gain: 120 dB min NC = NO CONNECT Low supply current: 3 mA typ per amplifier Figure 1. 8-Lead SOIC N (R-8) and 8-Lead MSOP (RM-8) Dual-supply operation: 5 V to 15 V Unity-gain stable No phase reversal OUT A 1 8 V+ AD8672 IN A 2 7 OUT B TOP VIEW +IN A 3 6 IN B APPLICATIONS (Not to Scale) V 4 5 +IN B PLL filters Filters for GPS Figure 2. 8-Lead SOIC-N (R-8) and 8-Lead MSOP (RM-8) Instrumentation Sensors and controls Professional quality audio OUT A 1 14 OUT D IN A 2 13 IN D +IN A 3 12 +IN D AD8674 GENERAL DESCRIPTION V+ 4 TOP VIEW 11 V (Not to Scale) The AD8671/AD8672/AD8674 are very high precision amplifiers +IN B 5 10 +IN C IN B 6 9 IN C featuring very low noise, very low offset voltage and drift, low OUT B 7 8 OUT C input bias current, 10 MHz bandwidth, and low power consumption. Outputs are stable with capacitive loads of over Figure 3. 14-Lead SOIC N (R-14) and 14-Lead TSSOP (RU-14) 1000 pF. Supply current is less than 3 mA per amplifier at 30 V. The AD8671/AD8672/AD8674s combination of ultralow noise, high precision, speed, and stability is unmatched. The MSOP The AD8671, AD8672, and AD8674 are members of a growing version of the AD8671/AD8672 requires only half the board series of low noise op amps offered by Analog Devices, Inc. space of comparable amplifiers. Table 1. Voltage Noise Applications for these amplifiers include high quality PLL Package 0.9 nV 1.1 nV 1.8 nV 2.8 nV 3.8 nV filters, precision filters, medical and analytical instrumentation, Single AD797 AD8597 ADA4004-1 AD8675 AD8671 precision power supply controls, ATE, data acquisition, and Dual AD8599 ADA4004-2 AD8676 AD8672 precision controls as well as professional quality audio. Quad ADA4004-4 AD8674 The AD8671/AD8672 are specified over the extended industrial temperature range (40C to +125C), and the AD8674 is specified over the industrial temperature range (40C to +85C). The AD8671/AD8672 are available in the 8-lead SOIC and 8-lead MSOP packages. The AD8674 is available in 14-lead SOIC and 14-lead TSSOP packages. Surface-mount devices in MSOP packages are available in tape and reel only. 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 20042013 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. 03718-B-001 03718-B-003 03718-B-005AD8671/AD8672/AD8674 Data Sheet TABLE OF CONTENTS Specifications ..................................................................................... 3 Output Phase Reversal ............................................................... 12 Electrical Characteristics, 5.0 V ............................................... 3 Total Noise vs. Source Resistance ............................................. 12 Electrical Characteristics, 15 V ................................................ 4 Total Harmonic Distortion (THD) and Noise ....................... 13 Absolute Maximum Ratings ............................................................ 5 Driving Capacitive Loads .......................................................... 13 ESD Caution .................................................................................. 5 GPS Receiver ............................................................................... 14 Typical Performance Characteristics ............................................. 6 Band-Pass Filter .......................................................................... 14 Applications ..................................................................................... 11 PLL Synthesizers and Loop Filters ........................................... 14 Power Dissipation Calculations ................................................ 11 Outline Dimensions ....................................................................... 15 Unity-Gain Follower Applications ........................................... 11 Ordering Guide .......................................................................... 17 REVISION HISTORY 3/13Rev. E to Rev. F 4/04Rev. A to Rev. B Added Figure 7 .............................................................................. 6 Changes to Figure 32 .................................................................. 11 Updated Outline Dimensions ................................................... 15 Changes to Figures 36, 37, and 38 ............................................ 12 Changes to Ordering Guide ...................................................... 17 6/10Rev. D to Rev. E 1/04Rev. 0 to Rev. A Added Table 1 and Preceding Sentence ..................................... 1 Added AD8672 and AD8674 parts .............................. Universal Changes to Specifications ............................................................. 3 12/09Rev. C to Rev. D Deleted Figure 3 ............................................................................. 6 Changes to Figures 7, 8, and 9 ..................................................... 6 Changes to Features and General Description Sections .......... 1 Changes to Figure 37 .................................................................. 12 Changes to Absolute Maximum Ratings Section, Table 3, Added new Figure 32 ................................................................. 10 and Table 4 ................................................................................ 5 Added Power Dissipation Calculations Section ..................... 11 Updated Outline Dimensions ................................................... 15 Changes to Ordering Guide ...................................................... 17 6/05Rev. B to Rev. C Changes to Figure 6 ...................................................................... 1 Updated Outline Dimensions ................................................... 14 Changes to Ordering Guide ...................................................... 16 Rev. F Page 2 of 20