Dual 12-/14-/16-Bit nanoDAC with 5 ppm/C On-Chip Reference Data Sheet AD5623R/AD5643R/AD5663R FEATURES FUNCTIONAL BLOCK DIAGRAM V V /V DD REFIN REFOUT Low power, smallest pin-compatible, dual nanoDAC 1.25V/2.5V AD5663R: 16 bits LDAC REFERENCE AD5643R: 14 bits INPUT DAC STRING SCLK BUFFER V A OUT REGISTER REGISTER DAC A AD5623R: 12 bits INTERFACE SYNC LOGIC User-selectable external or internal reference INPUT DAC STRING BUFFER V B OUT DIN REGISTER REGISTER DAC B External reference default On-chip 1.25 V/2.5 V, 5 ppm/C reference AD5623R/AD5643R/AD5663R 10-lead MSOP and 3 mm 3 mm LFCSP POWER-ON POWER-DOWN RESET LOGIC 2.7 V to 5.5 V power supply Guaranteed monotonic by design LDAC CLR GND Power-on reset to zero scale Figure 1. Per channel power-down Table 1. Related Devices Serial interface up to 50 MHz Part No. Description LDAC CLR Hardware and functions AD5663 2.7 V to 5.5 V, dual 16-bit nanoDAC, with external reference APPLICATIONS Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators GENERAL DESCRIPTION The AD5623R/AD5643R/AD5663R, members of the nanoDAC The low power consumption of this part in normal operation family, are low power, dual 12-, 14-, and 16-bit buffered voltage- makes it ideally suited to portable, battery-operated equipment. out digital-to-analog converters (DAC) that operate from a single The AD5623R/AD5643R/AD5663R use a versatile, 3-wire serial 2.7 V to 5.5 V supply and are guaranteed monotonic by design. interface that operates at clock rates up to 50 MHz, and they are The AD5623R/AD5643R/AD5663R have an on-chip reference. compatible with standard SPI, QSPI, MICROWIRE, and The AD5623R-3/AD5643R-3/AD5663R-3 have a 1.25 V, DSP interface standards. The on-chip precision output amplifier 5 ppm/C reference, giving a full-scale output of 2.5 V and the enables rail-to-rail output swing to be achieved. AD5623R-5/AD5643R-5/AD5663R-5 have a 2.5 V, 5 ppm/C PRODUCT HIGHLIGHTS reference, giving a full-scale output of 5 V. The on-chip 1. Dual 12-, 14-, and 16-bit DAC. reference is off at power-up, allowing the use of an external 2. On-chip 1.25 V/2.5 V, 5 ppm/C reference. reference and all devices can be operated from a single 2.7 V to 3. Available in 10-lead MSOP and 10-lead, 3 mm 5.5 V supply. The internal reference is turned on by writing to 3 mm LFCSP. the DAC. 4. Low power typically consumes 0.6 mW at 3 V and The parts incorporate a power-on reset circuit that ensures the 1.25 mW at 5 V. DAC output powers up to 0 V and remains there until a valid 5. 4.5 s maximum settling time for the AD5623R. write takes place. The part contains a power-down feature that reduces the current consumption of the device to 480 nA at 5 V and provides software-selectable output loads while in power- down mode. 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 20062015 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 05858-001AD5623R/AD5643R/AD5663R Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Output Amplifier ........................................................................ 21 Applications ....................................................................................... 1 Internal Reference ...................................................................... 21 Functional Block Diagram .............................................................. 1 External Reference ..................................................................... 21 General Description ......................................................................... 1 Serial Interface ............................................................................ 21 Product Highlights ........................................................................... 1 Input Shift Register .................................................................... 22 Revision History ............................................................................... 3 SYNC Interrupt .......................................................................... 22 Specif icat ions ..................................................................................... 4 Power-On Reset .......................................................................... 23 AD5623R-5/AD5643R-5/AD5663R-5 ....................................... 4 Software Reset ............................................................................. 23 AD5623R-3/AD5643R-3/AD5663R-3 ....................................... 6 Power-Down Modes .................................................................. 23 AC Characteristics ........................................................................ 7 LDAC Function .......................................................................... 24 Timing Characteristics ................................................................ 8 Internal Reference Setup ........................................................... 25 Timing Diagram ........................................................................... 8 Microprocessor Interfacing ....................................................... 26 Absolute Maximum Ratings ............................................................ 9 Applications Information .............................................................. 27 ESD Caution .................................................................................. 9 Using a Reference as a Power Supply ....................................... 27 Pin Configuration and Function Descriptions ........................... 10 Bipolar Operation Using the AD5663R ................................... 27 Typical Performance Characteristics ........................................... 11 Using the AD5663R with a Galvanically Isolated Interface .. 27 Terminology .................................................................................... 19 Power Supply Bypassing and Grounding ................................ 28 Theory of Operation ...................................................................... 21 Outline Dimensions ....................................................................... 29 Digital-to-Analog Section ......................................................... 21 Ordering Guide .......................................................................... 30 Resistor String ............................................................................. 21 Rev. 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