Octal, 16-Bit DAC with 5 ppm/C On-Chip Reference in 16-Lead TSSOP Enhanced Product AD5668-EP FEATURES FUNCTIONAL BLOCK DIAGRAM V V /V DD REFIN REFOUT Enhanced product features AD5668-EP 1.25V/2.5V REF Supports defense and aerospace applications (AQEC) BUFFER DAC INPUT STRING LDAC V A Military temperature range (55C to +125C) OUT REGISTER REGISTER DAC A Controlled manufacturing baseline BUFFER INPUT DAC STRING V B OUT REGISTER REGISTER DAC B One assembly/test site BUFFER INPUT DAC STRING SCLK V C OUT REGISTER REGISTER DAC C One fabrication site INTERFACE BUFFER INPUT DAC STRING Product change notification SYNC LOGIC V D OUT REGISTER REGISTER DAC D Qualification data available on request BUFFER INPUT DAC STRING DIN V E OUT REGISTER REGISTER DAC E Low power, smallest pin-compatible octal DAC: 16 bits BUFFER INPUT DAC STRING V F OUT REGISTER REGISTER DAC F 16-lead TSSOP BUFFER INPUT DAC STRING On-chip 1.25 V, 5 ppm/C reference V G REGISTER REGISTER DAC G OUT Power down to 400 nA at 5 V, 200 nA at 3 V BUFFER DAC STRING INPUT V H OUT REGISTER REGISTER DAC H 2.7 V to 5.5 V power supply POWER-DOWN POWER-ON LOGIC RESET Guaranteed monotonic by design 1 1 GND LDAC CLR Power-on reset to zero scale or midscale 1 RU-16 PACKAGE ONLY 3 power-down functions Figure 1. Hardware LDAC and LDAC override function CLR function to programmable code Rail-to-rail operation APPLICATIONS Process control Data acquisition systems Portable battery-powered instruments GENERAL DESCRIPTION The AD5668-EP is a low power, octal, 16-bit, buffered voltage- DAC channels to simultaneously update. There is also an output digital-to-analog converter (DAC). It operates from a asynchronous CLR that updates all DACs to a user- single 2.7 V to 5.5 V supply and is guaranteed monotonic programmable codezero scale, midscale, or full scale. by design. The AD5668-EP uses a versatile 3-wire serial interface that The AD5668-EP has an on-chip reference with an internal gain operates at clock rates up to 50 MHz and is compatible with of 2. The AD5668-EP has a 1.25 V, 5 ppm/C reference, giving a standard SPI, QSPI, MICROWIRE, and DSP interface standards. full-scale output range of 2.5 V. The on-board reference is off at Additional application and technical information can be found power-up, allowing the use of an external reference, and the in the AD5668 data sheet. internal reference is enabled via a software write. PRODUCT HIGHLIGHTS The part incorporates a power-on-reset circuit that ensures that 1. Octal, 16-bit DAC. the DAC output powers up to 0 V and remains powered up at this 2. On-chip 1.25 V/2.5 V, 5 ppm/C reference. level until a valid write takes place. The part contains a power- 3. Available in 16-lead TSSOP. down feature that reduces the current consumption of the device 4. Power-on reset to 0 V or midscale. to 400 nA at 5 V and provides software-selectable output loads 5. Power-down capability. When powered down, the DAC while in power-down mode for any or all DAC channels. The typically consumes 200 nA at 3 V and 400 nA at 5 V. outputs of all DACs can be updated simultaneously using the LDAC function, with the added functionality of user-selectable Rev. B 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 20102018 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. 09463-001AD5668-EP Enhanced Product TABLE OF CONTENTS Features .............................................................................................. 1 Timing Characteristics .................................................................5 Applications ....................................................................................... 1 Absolute Maximum Ratings ............................................................6 Functional Block Diagram .............................................................. 1 ESD Caution...................................................................................6 General Description ......................................................................... 1 Pin Configuration and Function Descriptions ..............................7 Product Highlights ........................................................................... 1 Typical Performance Characteristics ..............................................8 Revision History ............................................................................... 2 Outline Dimensions ....................................................................... 14 Specifications ..................................................................................... 3 Ordering Guide .......................................................................... 14 AC Characteristics ........................................................................ 4 REVISION HISTORY 1/2018Rev. A to Rev. B Change to Features Section ............................................................. 1 Changes to Table 5 ............................................................................ 7 Changes to Figure 23 ...................................................................... 11 Moved Figure 33 ............................................................................. 13 Changes to Ordering Guide .......................................................... 14 1/2015Rev. 0 to Rev. A Changes to Ordering Guide .......................................................... 14 10/2010Revision 0: Initial Version Rev. B Page 2 of 14