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AD5666 Dataheets PDF



Part Number AD5666
Manufacturers Analog Devices
Logo Analog Devices
Description 16-Bit DAC
Datasheet AD5666 DatasheetAD5666 Datasheet (PDF)

Quad, 16-Bit DAC with 5 ppm/°C On-Chip Reference in 14-Lead TSSOP AD5666 05298-001 FEATURES Low power quad 16-bit DAC 14-lead TSSOP On-chip 1.25 V/2.5 V, 5 ppm/°C reference Power down to 400 nA @ 5 V, 200 nA @ 3 V 2.7 V to 5.5 V power supply Guaranteed monotonic by design Power-on reset to zero scale or midscale 3 power-down functions Hardware LDAC with LDAC override function CLR function to programmable code SDO daisy-chaining option Rail-to-rail operation APPLICATIONS Process control Data ac.

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Quad, 16-Bit DAC with 5 ppm/°C On-Chip Reference in 14-Lead TSSOP AD5666 05298-001 FEATURES Low power quad 16-bit DAC 14-lead TSSOP On-chip 1.25 V/2.5 V, 5 ppm/°C reference Power down to 400 nA @ 5 V, 200 nA @ 3 V 2.7 V to 5.5 V power supply Guaranteed monotonic by design Power-on reset to zero scale or midscale 3 power-down functions Hardware LDAC with LDAC override function CLR function to programmable code SDO daisy-chaining option Rail-to-rail operation APPLICATIONS Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators FUNCTIONAL BLOCK DIAGRAM AD5666 LDAC SCLK SYNC INTERFACE LOGIC DIN SDO VDD VREFIN/VREFOUT INPUT REGISTER DAC REGISTER INPUT REGISTER DAC REGISTER INPUT REGISTER DAC REGISTER INPUT REGISTER POWER-ON RESET DAC REGISTER 1.25V/2.5V REF STRING DAC A BUFFER STRING DAC B BUFFER STRING DAC C BUFFER STRING DAC D BUFFER POWER-DOWN LOGIC LDAC CLR POR Figure 1. GND VOUTA VOUTB VOUTC VOUTD GENERAL DESCRIPTION The AD5666 is a low power, quad, 16-bit, buffered voltageoutput DAC. The part operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design. The AD5666 has an on-chip reference with an internal gain of 2. The AD5666-1 has a 1.25 V 5 ppm/°C reference, giving a full-scale output of 2.5 V; the AD5666-2 has a 2.5 V 5 ppm/°C reference, giving a full-scale output of 5 V. The on-board reference is off at power-up, allowing the use of an external reference. The internal reference is turned on by writing to the DAC. The part incorporates a power-on reset circuit that ensures that the DAC output powers up to 0 V (POR pin low) or to midscale (POR pin high) and remains powered up at this level until a valid write takes place. The part contains a power-down feature that reduces the current consumption of the device to 400 nA at 5 V and provides software-selectable output loads while in power-down mode for any or all DAC channels. The outputs of all DACs can be updated simultaneously using the LDAC function, with the added functionality of user-selectable DAC channels to simultaneously update. There is also an asynchronous CLR that clears all DACs to a software-selectable code—0 V, midscale, or full scale. The AD5666 utilizes a versatile 3-wire serial interface that operates at clock rates of up to 50 MHz and is compatible with standard SPI®, QSPI™, MICROWIRE™, and DSP interface standards. The on-chip precision output amplifier enables rail-to-rail output swing. PRODUCT HIGHLIGHTS 1. Quad, 16-bit DAC. 2. On-chip 1.25 V/2.5 V, 5 ppm/°C reference. 3. Available in 14-lead TSSOP. 4. Selectable power-on reset to 0 V or midscale. 5. Power-down capability. When powered down, the DAC typically consumes 200 nA at 3 V and 400 nA at 5 V. Rev. D 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 license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2005–2010 Analog Devices, Inc. All rights reserved. AD5666 TABLE OF CONTENTS Features .............................................................................................. 1  Applications....................................................................................... 1  Functional Block Diagram .............................................................. 1  General Description ......................................................................... 1  Product Highlights ........................................................................... 1  Revision History ............................................................................... 2  Specifications..................................................................................... 3  AC Characteristics........................................................................ 7  Timing Characteristics ................................................................ 8  Absolute Maximum Ratings.......................................................... 10  ESD Caution................................................................................ 10  Pin Configuration and Function Descriptions........................... 11  Typical Performance Characteristics ........................................... 12  Terminology .................................................................................... 18  Theory of Operation ...................................................................... 20  D/A Section....


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