Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifiers Data Sheet ADA4841-1/ADA4841-2 FEATURES CONNECTION DIAGRAMS Low power: 1.1 mA/amp ADA4841-1 TOP VIEW Low wideband noise NC 1 8 (Not to Scale) POWER DOWN 2.1 nV/Hz IN +V 2 7 S 1.4 pA/Hz +IN V 3 6 OUT Low 1/f noise V 4 5 NC S 7 nV/Hz 10 Hz Figure 1. 8-Lead SOIC (R) 13 pA/Hz 10 Hz Low distortion: 105 dBc 100 kHz, VO = 2 V p-p ADA4841-1 High speed V 1 6 +V OUT S 80 MHz, 3 dB bandwidth (G = +1) V 2 5 POWER DOWN 12 V/s slew rate S 175 ns settling time to 0.1% +IN 3 4 IN Low offset voltage: 0.3 mV maximum Rail-to-rail output Figure 2. 6-Lead SOT-23 (RJ) Power down ADA4841-2 Wide supply range: 2.7 V to 12 V OUT1 1 8 +V S IN1 2 7 OUT2 APPLICATIONS +IN1 3 6 IN2 V 4 5 +IN2 S Low power, low noise signal processing TOP VIEW Battery-powered instrumentation (Not to Scale) 16-bit PulSAR ADC drivers NOTES 1. FOR 8-LEAD LFCSP WD, CONNECT EXPOSED PADDLE TO GND. Figure 3. 8-Lead MSOP (RM), 8-Lead SOIC N (R), and 8-Lead LFCSP WD (CP) GENERAL DESCRIPTION 16-bit PulSAR ADCs. The ADA4841-1/ADA4841-2 are unity gain stable, low noise and distortion, rail-to-rail output amplifiers that have a quiescent The ADA4841-1/ADA4841-2 packages feature RoHS compliant current of 1.5 mA maximum. In spite of their low power lead finishes. The amplifiers are rated to work over the consumption, these amplifiers offer low wideband voltage industrial temperature range (40C to +125C). noise performance of 2.1 nV/Hz and 1.4 pA/Hz current noise, 30 along with excellent spurious-free dynamic range (SFDR) of V = 5V S G = +1 40 105 dBc at 100 kHz. To maintain a low noise environment at lower frequencies, the amplifiers have low 1/f noise of 7 nV/Hz 50 and 13 pA/Hz at 10 Hz. 60 The ADA4841-1/ADA4841-2 output can swing to less than 70 2V p-p THIRD 50 mV of either rail. The input common-mode voltage range 80 extends down to the negative supply. The ADA4841-1/ 90 ADA4841-2 can drive up to 10 pF of capacitive load with minimal peaking. 2V p-p SECOND 100 The ADA4841-1/ADA4841-2 provide the performance required 110 to efficiently support emerging 16-bit to 18-bit ADCs and are 120 ideal for portable instrumentation, high channel count, industrial 0.01 0.1 1 FREQUENCY (MHz) measurement, and medical applications. The ADA4841-1/ ADA4841-2 are ideally suited to drive the AD7685/AD7686, Figure 4. Harmonic Distortion 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 20052017 Analog Devices, Inc. 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Technical Support www.analog.com HARMONIC DISTORTION (dBc) 05614-064 05614-001 05614-099 05614-048ADA4841-1/ADA4841-2 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Headroom Considerations ........................................................ 14 Applications ....................................................................................... 1 Capacitance Drive ...................................................................... 15 Connection Diagrams ...................................................................... 1 Input Protection ......................................................................... 15 General Description ......................................................................... 1 Power-Down Operation ............................................................ 16 Revision History ............................................................................... 2 Applications Information .............................................................. 17 Specifications ..................................................................................... 3 Typical Performance Values ...................................................... 17 Absolute Maximum Ratings ............................................................ 6 16-Bit ADC Driver ..................................................................... 17 Thermal Resistance ...................................................................... 6 Reconstruction Filter ................................................................. 17 Maximum Power Dissipation ..................................................... 6 Layout Considerations ............................................................... 18 ESD Caution .................................................................................. 6 Ground Plane .............................................................................. 18 Typical Performance Characteristics ............................................. 7 Power Supply Bypassing ............................................................ 18 Theory of Operation ...................................................................... 13 Outline Dimensions ....................................................................... 19 Amplifier Description ................................................................ 13 Ordering Guide .......................................................................... 20 DC Errors .................................................................................... 13 Noise Considerations ................................................................. 13 REVISION HISTORY 3/2017Rev. F to Rev. G Changes to Table 1 ............................................................................. 3 Changes to Table 2 ............................................................................. 4 Updated Outline Dimensions ....................................................... 20 Changes to Table 3 ............................................................................. 5 Changes to Ordering Guide .......................................................... 20 Changes to Table 4, Table 5, and Figure 4 ...................................... 6 3/2014Rev. E to Rev. F Changes to Figure 6 ........................................................................... 7 Changes to Figure 14 ................................................................................... 8 Changes to Figure 12, Figure 13, Figure 15, and Figure 16 .......... 8 Updated Outline Dimensions ....................................................... 20 Deleted Figure 25 Renumber Sequentially................................. 10 Changes to Ordering Guide .......................................................... 20 Changes to Figure 24 and Figure 28 ............................................ 10 Changes to Figure 31 ...................................................................... 11 12/2010Rev. D to Rev. E Inserted Figure 37 Renumber Sequentially ................................ 12 Changes to Negative Power Supply Rejection Ration Conditions .. 3 Changes to Amplifier Description Section and Figure 39 ........ 13 Changes to Ordering Guide .......................................................... 20 Changed DC Performance Considerations Section 1/2010Rev. C to Rev. D to DC Errors Section ...................................................................... 13 Added LFCSP Package ....................................................... Universal Changes to Noise Considerations Section .................................. 14 Changes to Operating Temperature Range Parameter, Changes to Headroom Considerations Section and Figure 39 15 Table 4 ................................................................................................ 6 Changes to Power-Down Operation Section .............................. 16 Updated Outline Dimensions ....................................................... 19 Changes to 16-Bit ADC Driver Section, Figure 48, and Figure 49 17 Changes to Ordering Guide .......................................................... 20 Changes to Power Supply Bypassing Section ............................. 18 3/2006Rev. B to Rev. C Updated Outline Dimensions ....................................................... 19 Added SOT-23 Package ..................................................... Universal Changes to Ordering Guide .......................................................... 20 Changes to General Description .................................................... 1 9/2005Rev. 0 to Rev. A Changes to Table 1 ............................................................................ 3 Changes to Features .......................................................................... 1 Changes to Table 2 ............................................................................ 4 Changes to Figure 2 ........................................................................... 1 Changes to Table 3 ............................................................................ 5 Changes to Figure 12 ......................................................................... 8 Changes to Input Protection Section ........................................... 15 Changes to Figure 40 ...................................................................... 14 Changes to Ordering Guide .......................................................... 20 Changes to Headroom Considerations Section ......................... 15 10/2005Rev. A to Rev. B 7/2005Revision 0: Initial Version Added ADA4841-2 ............................................................ Universal Changes to General Description and Features ............................. 1 Rev. G Page 2 of 20