Ultralow Noise XFET Voltage References with Current Sink and Source Capability Data Sheet ADR430/ADR431/ADR433/ADR434/ADR435 FEATURES PIN CONFIGURATIONS Low noise (0.1 Hz to 10.0 Hz): 3.5 V p-p 2.5 V output TP 1 8 TP No external capacitor required ADR43x V 2 7 COMP IN TOP VIEW Low temperature coefficient NIC 3 6 V OUT (Not to Scale) A Grade: 10 ppm/C maximum GND 4 5 TRIM B Grade: 3 ppm/C maximum NOTES Load regulation: 15 ppm/mA 1. NIC = NO INTERNAL CONNECTION 2. TP = TEST PIN (DO NOT CONNECT) Line regulation: 20 ppm/V Figure 1. 8-Lead MSOP (RM-8) Wide operating range ADR430: 4.1 V to 18 V ADR431: 4.5 V to 18 V TP 1 8 TP ADR433: 5.0 V to 18 V ADR43x V 2 7 COMP IN TOP VIEW ADR434: 6.1 V to 18 V NIC 3 6 V OUT (Not to Scale) GND 4 5 TRIM ADR435: 7.0 V to 18 V High output source and sink current: +30 mA and 20 mA NOTES 1. NIC = NO INTERNAL CONNECTION Wide temperature range: 40C to +125C 2. TP = TEST PIN (DO NOT CONNECT) Figure 2. 8-Lead SOIC N (R-8) APPLICATIONS Precision data acquisition systems High resolution data converters Medical instruments Industrial process control systems Optical control circuits Precision instruments GENERAL DESCRIPTION The ADR43x series is a family of XFET voltage references Table 1. Selection Guide featuring low noise, high accuracy, and low temperature drift Temperature performance. Using Analog Devices, Inc., patented temperature Output Coefficient drift curvature correction and XFET (eXtra implanted junction Model Voltage (V) Accuracy (mV) (ppm/C) FET) technology, voltage change vs. temperature nonlinearity in ADR430A 2.048 3 10 the ADR43x is minimized. ADR430B 2.048 1 3 ADR431A 2.500 3 10 The XFET references operate at lower current (800 A) and ADR431B 2.500 1 3 lower supply voltage headroom (2 V) than buried Zener ADR433A 3.000 4 10 references. Buried Zener references require more than 5 V ADR433B 3.000 1.5 3 headroom for operation. The ADR43x XFET references are ADR434A 4.096 5 10 the only low noise solutions for 5 V systems. ADR434B 4.096 1.5 3 The ADR43x family has the capability to source up to 30 mA of ADR435A 5.000 6 10 output current and sink up to 20 mA. It also comes with a trim ADR435B 5.000 2 3 terminal to adjust the output voltage over a 0.5% range without compromising performance. The ADR43x is available in 8-lead MSOP and 8-lead narrow SOIC packages. All versions are specified over the extended industrial temperature range of 40C to +125C. Rev. M 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 20032015 Analog Devices, Inc. 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Technical Support www.analog.com 04500-041 04500-001ADR430/ADR431/ADR433/ADR434/ADR435 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Noise Performance ..................................................................... 15 Applications ....................................................................................... 1 High Frequency Noise ............................................................... 15 Pin Configurations ........................................................................... 1 Turn-On Time ............................................................................ 16 General Description ......................................................................... 1 Applications Information .............................................................. 17 Revision History ............................................................................... 3 Output Adjustment .................................................................... 17 Specifications ..................................................................................... 4 Reference for Converters in Optical Network Control Circuits......................................................................................... 17 ADR430 Electrical Characteristics ............................................. 4 High Voltage Floating Current Source .................................... 17 ADR431 Electrical Characteristics ............................................. 5 Kelvin Connection ..................................................................... 17 ADR433 Electrical Characteristics ............................................. 6 Dual Polarity References ........................................................... 18 ADR434 Electrical Characteristics ............................................. 7 Programmable Current Source ................................................ 18 ADR435 Electrical Characteristics ............................................. 8 Programmable DAC Reference Voltage .................................. 19 Absolute Maximum Ratings ............................................................ 9 Precision Voltage Reference for Data Converters .................. 19 Thermal Resistance ...................................................................... 9 Precision Boosted Output Regulator ....................................... 20 ESD Caution .................................................................................. 9 Outline Dimensions ....................................................................... 21 Typical Performance Characteristics ........................................... 10 Ordering Guide .......................................................................... 22 Theory of Operation ...................................................................... 15 Basic Voltage Reference Connections ...................................... 15 Rev. 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