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Ultraprecision, Low Noise, 2.048 V/2.500 V/ 3.00 …

Ultraprecision, Low Noise, V/. V XFET Voltage References Data Sheet ADR420/ADR421/ADR423/ADR425. FEATURES PIN CONFIGURATION. Low noise ( Hz to 10 Hz) TP 1 ADR420/ 8 TP. ADR420: V p-p VIN 2. ADR421/ 7 NIC. ADR423/. ADR421: V p-p NIC 3 ADR425 6 VOUT. ADR423: V p-p TOP VIEW. GND 4 (Not to Scale) 5 TRIM. ADR425: V p-p 02432-001. Low temperature coefficient: 3 ppm/ C NIC = NO INTERNAL CONNECTION. TP = TEST PIN (DO NOT CONNECT). Long-term stability: 50 ppm/1000 hours Figure 1. 8-Lead SOIC, 8-Lead MSOP. Load regulation: 70 ppm/mA.

Ultraprecision, Low Noise, 2.048 V/2.500 V/ 3.00 V/5.00 V XFET® Voltage References Data Sheet ADR420/ADR421/ADR423/ADR425 Rev. J Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable.

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Transcription of Ultraprecision, Low Noise, 2.048 V/2.500 V/ 3.00 …

1 Ultraprecision, Low Noise, V/. V XFET Voltage References Data Sheet ADR420/ADR421/ADR423/ADR425. FEATURES PIN CONFIGURATION. Low noise ( Hz to 10 Hz) TP 1 ADR420/ 8 TP. ADR420: V p-p VIN 2. ADR421/ 7 NIC. ADR423/. ADR421: V p-p NIC 3 ADR425 6 VOUT. ADR423: V p-p TOP VIEW. GND 4 (Not to Scale) 5 TRIM. ADR425: V p-p 02432-001. Low temperature coefficient: 3 ppm/ C NIC = NO INTERNAL CONNECTION. TP = TEST PIN (DO NOT CONNECT). Long-term stability: 50 ppm/1000 hours Figure 1. 8-Lead SOIC, 8-Lead MSOP. Load regulation: 70 ppm/mA.

2 Line regulation: 35 ppm/V GENERAL DESCRIPTION. Low hysteresis: 40 ppm typical The ADR42x are a series of ultraprecision, second generation Wide operating range eXtra implanted junction FET (XFET) voltage references ADR420: 4 V to 18 V featuring low noise, high accuracy, and excellent long-term ADR421: V to 18 V stability in SOIC and MSOP footprints. ADR423: 5 V to 18 V. Patented temperature drift curvature correction technique and ADR425: 7 V to 18 V. XFET technology minimize nonlinearity of the voltage change Quiescent current: mA maximum with temperature.

3 The XFET architecture offers superior High output current: 10 mA. accuracy and thermal hysteresis to the band gap references. It Wide temperature range: 40 C to +125 C. also operates at lower power and lower supply headroom than APPLICATIONS the buried Zener references. Precision data acquisition systems The superb noise and the stable and accurate characteristics High resolution converters of the ADR42x make them ideal for precision conversion Battery-powered instrumentation applications such as optical networks and medical equipment.

4 Portable medical instruments The ADR42x trim terminal can also be used to adjust the out- Industrial process control systems put voltage over a range without compromising any Precision instruments other performance. The ADR42x series voltage references Optical network control circuits offer two electrical grades and are specified over the extended industrial temperature range of 40 C to +125 C. devices have 8-lead SOIC or 30% smaller, 8-lead MSOP packages. ADR42x PRODUCTS. Table 1. Initial Accuracy Model Output Voltage, VOUT (V) mV % Temperature Coefficient (ppm/ C).

5 ADR420 1, 3 , 3, 10. ADR421 1, 3 , 3, 10. ADR423 , 4 , 3, 10. ADR425 2, 6 , 3, 10. Rev. J 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 rights of third parties that may result from its use. Specifications subject to change without notice. No One Technology Way, Box 9106, Norwood, MA 02062-9106, license is granted by implication or otherwise under any patent or patent rights of analog devices .

6 Tel: 2001 2013 analog devices , Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support ADR420/ADR421/ADR423/ADR425 Data Sheet TABLE OF CONTENTS. Features .. 1 Device Power Dissipation Considerations .. 17. Applications .. 1 Basic Voltage Reference Connections .. 17. Pin Configuration .. 1 Noise Performance .. 17. General Description .. 1 Turn-On Time .. 17. ADR42x Products .. 1 18. Revision History .. 3 Output Adjustment .. 18. 4 Reference for Converters in Optical Network Control ADR420 Electrical 4 18.

7 ADR421 Electrical 5 High Voltage Floating Current Source .. 18. ADR423 Electrical 6 Kelvin Connections .. 19. ADR425 Electrical 7 Dual-Polarity References .. 19. Absolute Maximum Ratings .. 8 Programmable Current Source .. 20. Thermal Resistance .. 8 Programmable DAC Reference Voltage .. 20. ESD Caution .. 8 Precision Voltage Reference for Data Converters .. 21. Pin Configurations and Function Descriptions .. 9 Precision Boosted Output Regulator .. 21. Typical Performance Characteristics .. 10 Outline Dimensions .. 22. Terminology.

8 16 Ordering Guide .. 23. Theory of Operation .. 17. Rev. J | Page 2 of 24. Data Sheet ADR420/ADR421/ADR423/ADR425. REVISION HISTORY. 12/13 Rev. I to Rev. J 7/04 Rev. D to Rev. E. Added JC Values to Table 8 Changes to Ordering Guide .. 5. Changes to Ordering Guide ..23 3/04 Rev. C to Rev. D. 5/11 Rev. H to Rev. I Changes to Table I .. 1. Added Endnote 1 in Table 4 Changes to Ordering Guide .. 4. Added Endnote 1 in Table 5 Updated Outline 16. Added Endnote 1 in Table 6 1/03 Rev. B to Rev. C. Added Endnote 1 in Table 7. Deleted A Negative Precision Reference Without Precision Changed Mini_SOIC to MSOP.

9 Universal Resistors Section ..17 Changes to Ordering Guide .. 4. Deleted Figure 42; Renumbered Sequentially ..17 Corrections to Y-axis labels in TPCs 21 and 24 .. 9. Updated Outline Dimensions ..21 Enhancement to Figure 13 .. 15. Changes to Ordering Guide ..22 Updated Outline 16. 6/07 Rev. G to Rev. H 3/02 Rev. A to Rev. B. Changes to Table 2 .. 3 Edits to Ordering Guide .. 4. Changes to Table 3 .. 4 Deletion of Precision Voltage Regulator 15. Changes to Table 4 .. 5 Addition of Precision Boosted Output Regulator section.

10 15. Changes to Table 5 .. 6 Addition of Figure 15. Updated Outline Dimensions ..21 10/01 Rev. 0 to Rev. A. Changes to Ordering Guide ..22 Addition of ADR423 and ADR425 to 6/05 Rev. F to Rev. G ADR420/ADR421 .. Universal Changes to Table 1 .. 1 5/01 Revision 0: Initial Version Changes to Ordering Guide ..22. 2/05 Rev. E to Rev. F. Updated Universal Updated Outline Dimensions ..21. Changes to Ordering Guide ..22. Rev. J | Page 3 of 24. ADR420/ADR421/ADR423/ADR425 Data Sheet SPECIFICATIONS. ADR420 ELECTRICAL SPECIFICATIONS.


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