5 V 18-Bit nanoDAC in a SOT-23 Data Sheet AD5680 FEATURES FUNCTIONAL BLOCK DIAGRAM V V GND REF DD Single 18-bit nanoDAC 18-bit monotonic V POWER-ON FB 12-bit accuracy guaranteed RESET Tiny 8-lead SOT-23 package OUTPUT V OUT BUFFER Power-on reset to zero scale/midscale REF(+) DAC 18-BIT DAC 4.5 V to 5.5 V power supply REGISTER Serial interface Rail-to-rail operation INPUT SYNC interrupt facility CONTROL LOGIC Temperature range: 40C to +105C APPLICATIONS AD5680 Closed-loop process control SYNC SCLK DIN Low bandwidth data acquisition systems Figure 1. Portable battery-powered instruments Gain and offset adjustment Precision setpoint control GENERAL DESCRIPTION The AD5680, a member of the nanoDAC family, is a single, The AD5680 uses a versatile 3-wire serial interface that operates 18-bit buffered voltage-out digital-to-analog converter (DAC) at clock rates up to 30 MHz, and is compatible with standard that operates from a single 4.5 V to 5.5 V supply and is 18-bit SPI, QSPI, MICROWIRE, and DSP interface standards. monotonic. PRODUCT HIGHLIGHTS The AD5680 requires an external reference voltage to set the 1. 18 bits of resolution. output range of the DAC. The part incorporates a power-on 2. 12-bit accuracy guaranteed for 18-bit DAC. reset circuit that ensures the DAC output powers up to 0 V (AD5680-1) or to midscale (AD5680-2) and remains there until 3. Available in an 8-lead SOT-23. a valid write takes place. 4. Low power typically consumes 1.6 mW at 5 V. The low power consumption of this part in normal operation 5. Power-on reset to zero scale or to midscale. makes it ideally suited to portable battery-operated equipment. RELATED DEVICES The power consumption is 1.6 mW at 5 V. AD566216-bit DAC in SOT-23. The AD5680 on-chip precision output amplifier allows rail-to- rail output swing to be achieved. For remote sensing applications, the output amplifiers inverting input is available to the user. Rev. C 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: 781.329.470020062017 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. 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Technical Support www.analog.com 05854-001AD5680 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Output Amplifier ........................................................................ 11 Applications ....................................................................................... 1 Interpolator Architecture .......................................................... 11 Functional Block Diagram .............................................................. 1 Serial Interface ............................................................................ 12 General Description ......................................................................... 1 Input Shift Register .................................................................... 12 Product Highlights ........................................................................... 1 SYNC Interrupt .......................................................................... 12 Related Devices ................................................................................. 1 Power-On Reset .......................................................................... 12 Revision History ............................................................................... 2 Microprocessor Interfacing ....................................................... 13 Specif icat ions ..................................................................................... 3 Applications Information .............................................................. 14 Timing Characteristics ................................................................ 4 Closed-Loop Applications ........................................................ 14 Absolute Maximum Ratings ............................................................ 5 Filter ............................................................................................. 14 ESD Caution .................................................................................. 5 Choosing a Reference for the AD5680 .................................... 15 Pin Configurations and Function Descriptions ........................... 6 Using a Reference as a Power Supply for the AD5680 .......... 16 Typical Performance Characteristics ............................................. 7 Using the AD5680 with a Galvanically Isolated Interface .... 16 Terminology .................................................................................... 10 Power Supply Bypassing and Grounding ................................ 16 Theory of Operation ...................................................................... 11 Outline Dimensions ....................................................................... 17 DAC Section ................................................................................ 11 Ordering Guide .......................................................................... 17 Resistor String ............................................................................. 11 REVISION HISTORY 7/2017Rev. B to Rev. C Changed ADSP-BF53x to ADSP-BF531 ..................... Throughout Changed ADuM13x to ADuM130D ........................... Throughout Added t Parameter, Table 2 .................................................... 4 UPDATE Change to Figure 28 ....................................................................... 13 Changes to Figure 37 ...................................................................... 16 Changes to Ordering Guide .......................................................... 19 2/2014Rev. A to Rev. B Added 8-Lead LFCSP ......................................................... Universal Changes to Figure 3 Caption and Table 4 Caption ...................... 6 Added Figure 4 Renumbered Sequentially .................................. 6 Updated Outline Dimensions ....................................................... 17 Changes to Ordering Guide .......................................................... 17 3/2007Rev. 0 to Rev. A Changes to Input Shift Register Section ...................................... 12 Changes to Figure 25 ...................................................................... 12 6/2006Revision 0: Initial Version Rev. C Page 2 of 20