1 nV/Hz, Low Power, Rail-to-Rail Output Amplifiers Data Sheet ADA4896-2/ADA4897-1/ADA4897-2 FEATURES FUNCTIONAL BLOCK DIAGRAM Low wideband noise NC 1 8 DISABLE 1 nV/Hz IN 2 7 +V S 2.8 pA/Hz +IN 3 6 OUT Low 1/f noise: 2.4 nV/Hz at 10 Hz V 4 5 NC S Low distortion: 115 dBc at 100 kHz, V = 2 V p-p OUT Figure 1. 8-Lead SOIC (ADA4897-1) Low power: 3 mA per amplifier Low input offset voltage: 0.5 mV maximum 8 High speed V = 5V S 3 dB bandwidth: 230 MHz (G = +1) 7 Slew rate: 120 V/s 6 Settling time to 0.1%: 45 ns Rail-to-rail output 5 Wide supply range: 3 V to 10 V Disable feature (ADA4897-1/ADA4897-2) 4 APPLICATIONS 3 Low noise preamplifier 2 Ultrasound amplifiers PLL loop filters 1 High performance ADC drivers 0 DAC buffers 1 10 100 1k 10k 100k 1M 5M FREQUENCY (Hz) Figure 2. Voltage Noise vs. Frequency GENERAL DESCRIPTION The ADA4896-2/ADA4897-1/ADA4897-2 are unity-gain stable, Table 1. Other Low Noise Amplifiers low noise, rail-to-rail output, high speed voltage feedback amplifiers V (nV/Hz) Supply N that have a quiescent current of 3 mA. With a 1/f noise of Part No. At 1 kHz At 100 kHz BW (MHz) Voltage (V) 2.4 nV/Hz at 10 Hz and a spurious-free dynamic range of 80 dBc AD797 0.9 0.9 8 10 to 30 at 2 MHz, the ADA4896-2/ADA4897-1/ADA4897-2 are ideal AD8021 5 2.1 490 5 to 24 solutions in a variety of applications, including ultrasound, low AD8099 3 0.95 510 5 to 12 AD8045 6 3 1000 3.3 to 12 noise preamplifiers, and drivers of high performance ADCs. The ADA4899-1 1.4 1 600 5 to 12 Analog Devices, Inc., proprietary next-generation SiGe bipolar ADA4898-1/ 0.9 0.9 65 10 to 32 process and innovative architecture enable such high performance ADA4898-2 amplifiers. The ADA4896-2/ADA4897-1/ADA4897-2 have 230 MHz Table 2. Complementary ADCs bandwidth, 120 V/s slew rate, and settle to 0.1% in 45 ns. Part No. Bits Speed (MSPS) Power (mW) With a wide supply voltage range of 3 V to 10 V, the ADA4896-2/ AD7944 14 2.5 15.5 ADA4897-1/ADA4897-2 are ideal candidates for systems that AD7985 16 2.5 15.5 require high dynamic range, precision, low power, and high speed. AD7986 18 2 15 The ADA4896-2 is available in 8-lead LFCSP and 8-lead MSOP packages. The ADA4897-1 is available in 8-lead SOIC and 6-lead SOT-23 packages. The ADA4897-2 is available in a 10-lead MSOP package. The ADA4896-2/ADA4897-1/ADA4897-2 operate over the extended industrial temperature range of 40C to +125C. Rev. B 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 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. VOLTAGE NOISE (nV/ Hz) 09447-101 09447-102ADA4896-2/ADA4897-1/ADA4897-2 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 17 Applications ....................................................................................... 1 Amplifier Description ................................................................ 17 General Description ......................................................................... 1 Input Protection ......................................................................... 17 Functional Block Diagram .............................................................. 1 Disable Operation ...................................................................... 17 Revision History ............................................................................... 2 DC Errors .................................................................................... 18 Specif icat ions ..................................................................................... 3 Bias Current Cancellation ......................................................... 18 5 V Supply ................................................................................... 3 Noise Considerations ................................................................. 19 +5 V Supply ................................................................................... 4 Capacitance Drive ...................................................................... 19 +3 V Supply ................................................................................... 6 Applications Information .............................................................. 20 Absolute Maximum Ratings ............................................................ 8 Typical Performance Values ...................................................... 20 Thermal Resistance ...................................................................... 8 Low Noise, Gain Selectable Amplifier ..................................... 21 Maximum Power Dissipation ..................................................... 8 Medical Ultrasound Applications ............................................ 22 ESD Caution .................................................................................. 8 Layout Considerations ............................................................... 24 Pin Configurations and Function Descriptions ........................... 9 Outline Dimensions ....................................................................... 25 Typical Performance Characteristics ........................................... 11 Ordering Guide .......................................................................... 27 REVISION HISTORY 4/12Rev. A to Rev. B Change to Figure 26 Moved Figure 26........................................ 13 Changes to Figure 37 ...................................................................... 15 Changed 6-Lead Single SOT-23 (ADA4897-1) Thermal Reistance from 306C/W to 150C/W ........................................... 8 Changes to Amplifier Description Section, Disable Operation Changes to Figure 3 .......................................................................... 8 Section, Figure 44, and Figure 45 ................................................. 17 10/11Rev. 0 to Rev. A Added Bias Current Cancellation Section, Figure 47, Added ADA4897-2 and 10-Lead MSOP ......................... Universal Table 11, and Table 12 .................................................................... 18 Change to Table 1 ............................................................................. 1 Changes to Table 13 ....................................................................... 20 Changes to Table 3 ............................................................................ 3 Changes to Low Noise, Gain Selectable Amplifier Section Changes to Table 4 ............................................................................ 4 and Figure 52 ................................................................................... 21 Changes to Table 5 ............................................................................ 6 Deleted Figure 51 ............................................................................ 22 Changes to Table 7 and Figure 3 ..................................................... 8 Changes to Power Supply Bypassing Section ............................. 24 Changes to Figure 4, Table 8, and Table 9 ..................................... 9 Moved Figure 57 ............................................................................. 25 Added Figure 8 and Table 10 Renumbered Sequentially ......... 10 Moved Figure 58 ............................................................................. 26 Changed Summary Statement for Typical Performance Added Figure 60 ............................................................................. 27 Characteristics Section ................................................................... 11 Changes to Ordering Guide .......................................................... 27 Changes to Figure 18 ...................................................................... 12 7/11Revision 0: Initial Version Change to Figure 20 ....................................................................... 12 Rev. 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