Ultralow Noise, LDO XFET Voltage References with Current Sink and Source Data Sheet ADR440/ADR441/ADR443/ADR444/ADR445 FEATURES PIN CONFIGURATIONS Ultralow noise (0.1 Hz to 10 Hz) ADR440/ DNC 1 8 DNC ADR441/ ADR440: 1 V p-p V 2 ADR443/ 7 NIC IN ADR441: 1.2 V p-p ADR444/ NIC 3 6 V OUT ADR445 ADR443: 1.4 V p-p TOP VIEW GND 4 5 TRIM ADR444: 1.8 V p-p (Not to Scale) ADR445: 2.25 V p-p NOTES Superb temperature coefficient 1. NIC = NOT INTERNALLY CONNECTED. THIS PIN IS NOT CONNECTED INTERNALLY. A grade: 10 ppm/C 2. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN. B grade: 3 ppm/C Figure 1. 8-Lead SOIC N (R Suffix) Low dropout operation (supply voltage headroom): 500 mV Input range: (V + 500 mV) to 18 V OUT ADR440/ DNC 1 8 DNC High output source and sink current ADR441/ V 2 ADR443/ 7 NIC IN +10 mA and 5 mA, respectively ADR444/ NIC 3 6 V OUT Wide temperature range: 40C to +125C ADR445 TOP VIEW GND 4 5 TRIM (Not to Scale) APPLICATIONS Precision data acquisition systems NOTES 1. NIC = NOT INTERNALLY CONNECTED. High resolution data converters THIS PIN IS NOT CONNECTED INTERNALLY. 2. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN. Battery-powered instrumentation Figure 2. 8-Lead MSOP (RM Suffix) Portable medical instruments Industrial process control systems Precision instruments Optical control circuits GENERAL DESCRIPTION 1 The ADR440/ADR441/ADR443/ADR444/ADR445 series is a The ADR440/ADR441/ADR443/ADR444/ADR445 family is family of XFET voltage references featuring ultralow noise, available in 8-lead MSOP and narrow SOIC packages and high accuracy, and low temperature drift performance. Using offered in two electrical grades. All versions are specified over the Analog Devices, Inc., temperature drift curvature correction extended industrial temperature range of 40C to +125C. and extra implanted junction FET (XFET) technology, voltage Table 1. Selection Guide change vs. temperature nonlinearity in the ADR440/ADR441/ ADR443/ADR444/ADR445 is greatly minimized. Initial Temperature Output Accuracy Coefficient The XFET references offer better noise performance than buried Model Voltage (V) (mV) (ppm/C) Zener references, and XFET references operate off low supply ADR440A 2.048 3 10 voltage headroom (500 mV). This combination of features ADR440B 2.048 1 3 makes the ADR440/ADR441/ADR443/ADR444/ ADR445 ADR441A 2.500 3 10 family ideally suited for precision signal conversion applications ADR441B 2.500 1 3 in high end data acquisition systems, optical networks, and ADR443A 3.000 4 10 medical applications. ADR443B 3.000 1.2 3 The ADR440/ADR441/ADR443/ADR444/ADR445 family has ADR444A 4.096 5 10 the capability to source up to 10 mA of output current and sink ADR444B 4.096 1.6 3 up to 5 mA. It also comes with a trim terminal to adjust the ADR445A 5.000 6 10 output voltage over a 0.5% range without compromising ADR445B 5.000 2 3 performance. 1 Protected by U.S. Patent Number 5,838,192. Rev. 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Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 05428-002 05428-001ADR440/ADR441/ADR443/ADR444/ADR445 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ........................................... 10 Applications ....................................................................................... 1 Theory of Operation ...................................................................... 15 Pin Configurations ........................................................................... 1 Power Dissipation Considerations ........................................... 15 General Description ......................................................................... 1 Basic Voltage Reference Connections ..................................... 15 Revision History ............................................................................... 2 Noise Performance ..................................................................... 15 Specif icat ions ..................................................................................... 3 Turn On Time ............................................................................. 15 ADR440 Electrical Characteristics ............................................. 3 Applications Information .............................................................. 16 ADR441 Electrical Characteristics ............................................. 4 Output Adjustment .................................................................... 16 ADR443 Electrical Characteristics ............................................. 5 Bipolar Outputs .......................................................................... 16 ADR444 Electrical Characteristics ............................................. 6 Programmable Voltage Source ................................................. 16 ADR445 Electrical Characteristics ............................................. 7 Programmable Current Source ................................................ 17 Absolute Maximum Ratings ............................................................ 8 High Voltage Floating Current Source .................................... 17 Thermal Resistance ...................................................................... 8 Precision Output Regulator (Boosted Reference) ................. 17 ESD Caution .................................................................................. 8 Outline Dimensions ....................................................................... 18 Pin Configurations and Function Descriptions ........................... 9 Ordering Guide .......................................................................... 19 REVISION HISTORY 4/2018Rev. F to Rev. G 3/2008Rev. B to Rev. C Changed V to V and Temperature Drift to Temperature Changes to Table 8 ............................................................................. 8 O OUT Change to Figure 11 ....................................................................... 10 Coefficient ...................................................................... Throughout Changes to Features Section, General Description Section, Changes to Figure 36 ...................................................................... 15 Figure 1, and Figure 2 ...................................................................... 1 Changes to Figure 39 ...................................................................... 16 Added Patent Note, Note 1 .............................................................. 1 Changes to Figure 41 ...................................................................... 17 Changes to Initial Accuracy Parameter, Table 2 ........................... 3 Updated Outline Dimensions ....................................................... 18 Changes to Initial Accuracy Parameter, Table 3 ........................... 4 Changes to Initial Accuracy Parameter, Table 4 ........................... 5 8/2007Rev. A to Rev. B Changes to Initial Accuracy Parameter, Table 5 ........................... 6 Change to Table 2, Ripple Rejection Ratio Specification ............. 3 Changes to Initial Accuracy Parameter, Table 6 ........................... 7 Change to Table 3, Ripple Rejection Ratio Specification ............. 4 Added Pin Configurations and Functions Description Section, Change to Table 4, Ripple Rejection Ratio Specification ............. 5 Figure 3, Figure 4, and Table 9 Renumbered Sequentially ......... 9 Change to Table 5, Ripple Rejection Ratio Specification ............. 6 Changes to Figure 18 and Figure 20 ............................................. 12 Change to Table 6, Ripple Rejection Ratio Specification ............. 7 Change to Figure 28 ....................................................................... 13 Changes to Figure 36 and Noise Performance Section.............. 15 9/2006Rev. 0 to Rev. A Change to Table 10 ......................................................................... 16 Updated Format .................................................................. Universal Changes to Precision Output Regulator (Boosted Reference) Changes to Features .......................................................................... 1 Changes to Pin Configurations ....................................................... 1 Section .............................................................................................. 17 Changes to Specifications Section ................................................... 3 9/2016Rev. E to Rev. F Changes to Figure 4 and Figure 5 .................................................... 9 Changes to Figure 38 ...................................................................... 16 Inserted Figure 6 and Figure 7 ......................................................... 9 Changes to Figure 15 ...................................................................... 11 11/2010Rev. D to Rev. E Changes to Power Dissipation Considerations Section ............ 14 Deleted Negative Reference Section ............................................. 15 Changes to Figure 35 and Figure 36............................................. 15 Changes to Figure 38 and Table 9................................................. 16 Deleted Figure 37 Renumbered Sequentially ............................ 15 Updated Outline Dimensions ....................................................... 18 3/2010Rev. C to Rev. D Changes to Ordering Guide .......................................................... 19 Changes to Figure 37 ...................................................................... 15 Updated Outline Dimensions ....................................................... 18 10/2005Revision 0: Initial Version Rev. G Page 2 of 19