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 ADA4841-1 Low distortion: 105 dBc 100 kHz, VO = 2 V p-p V 1 6 +V High speed OUT S 80 MHz, 3 dB bandwidth (G = +1) V 2 5 POWER DOWN S 12 V/s slew rate 175 ns settling time to 0.1% +IN 3 4 IN Low offset voltage: 0.3 mV maximum Figure 2. 6-Lead SOT-23 (RJ) Rail-to-rail output Power down ADA4841-2 Wide supply range: 2.7 V to 12 V OUT1 1 8 +V S IN1 2 7 OUT2 +IN1 3 6 IN2 APPLICATIONS V 4 5 +IN2 S Low power, low noise signal processing TOP VIEW (Not to Scale) Battery-powered instrumentation NOTES 16-bit PulSAR ADC drivers 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 The ADA4841-1/ADA4841-2 are unity gain stable, low noise The ADA4841-1/ADA4841-2 packages feature RoHS compliant and distortion, rail-to-rail output amplifiers that have a quiescent lead finishes. The amplifiers are rated to work over the current of 1.5 mA maximum. In spite of their low power industrial temperature range (40C to +125C). consumption, these amplifiers offer low wideband voltage 30 noise performance of 2.1 nV/Hz and 1.4 pA/Hz current noise, V = 5V S G = +1 40 along with excellent spurious-free dynamic range (SFDR) of 105 dBc at 100 kHz. To maintain a low noise environment at 50 lower frequencies, the amplifiers have low 1/f noise of 7 nV/Hz 60 and 13 pA/Hz at 10 Hz. 70 2V p-p THIRD The ADA4841-1/ADA4841-2 output can swing to less than 80 50 mV of either rail. The input common-mode voltage range 90 extends down to the negative supply. The ADA4841-1/ 2V p-p SECOND ADA4841-2 can drive up to 10 pF of capacitive load with 100 minimal peaking. 110 The ADA4841-1/ADA4841-2 provide the performance required 120 0.01 0.1 1 to efficiently support emerging 16-bit to 18-bit ADCs and are FREQUENCY (MHz) ideal for portable instrumentation, high channel count, industrial Figure 4. Harmonic Distortion measurement, and medical applications. The ADA4841-1/ ADA4841-2 are ideally suited to drive the AD7685/AD7686, 16-bit PulSAR ADCs. 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 20052014 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 3/14Rev. E to Rev. F Changes to Table 3 ............................................................................. 5 Changes to Table 4, Table 5, and Figure 4 ...................................... 6 Changes to Figure 14 ................................................................................... 8 Changes to Figure 6 ........................................................................... 7 Updated Outline Dimensions ....................................................... 20 Changes to Figure 12, Figure 13, Figure 15, and Figure 16 .......... 8 Changes to Ordering Guide .......................................................... 20 Deleted Figure 25 Renumber Sequentially................................. 10 12/10Rev. D to Rev. E Changes to Figure 24 and Figure 28 ............................................ 10 Changes to Negative Power Supply Rejection Ration Conditions .. 3 Changes to Figure 31 ...................................................................... 11 Changes to Ordering Guide .......................................................... 20 Inserted Figure 37 Renumber Sequentially ................................ 12 1/10Rev. C to Rev. D Changes to Amplifier Description Section and Figure 39 ........ 13 Added LFCSP Package ....................................................... Universal Changed DC Performance Considerations Section Changes to Operating Temperature Range Parameter, Table 4 .. 6 to DC Errors Section ...................................................................... 13 Updated Outline Dimensions ....................................................... 19 Changes to Noise Considerations Section .................................. 14 Changes to Ordering Guide .......................................................... 20 Changes to Headroom Considerations Section and Figure 39 15 Changes to Power-Down Operation Section .............................. 16 3/06Rev. B to Rev. C Changes to 16-Bit ADC Driver Section, Figure 48, and Figure 49 17 Added SOT-23 Package ..................................................... Universal Changes to Power Supply Bypassing Section ............................. 18 Changes to General Description .................................................... 1 Updated Outline Dimensions ....................................................... 19 Changes to Table 1 ............................................................................ 3 Changes to Ordering Guide .......................................................... 20 Changes to Table 2 ............................................................................ 4 Changes to Table 3 ............................................................................ 5 9/05Rev. 0 to Rev. A Changes to Input Protection Section ........................................... 15 Changes to Features .......................................................................... 1 Changes to Ordering Guide .......................................................... 20 Changes to Figure 2 ........................................................................... 1 Changes to Figure 12 ......................................................................... 8 10/05Rev. A to Rev. B Changes to Figure 40 ...................................................................... 14 Added ADA4841-2 ............................................................ Universal Changes to Headroom Considerations Section ......................... 15 Changes to General Description and Features ............................. 1 Changes to Table 1 ............................................................................ 3 7/05Revision 0: Initial Version Changes to Table 2 ............................................................................ 4 Rev. F Page 2 of 20