Quad, 16-Bit DAC with 5 ppm/C On-Chip Reference in 14-Lead TSSOP AD5666-EP The AD5666-EP has an on-chip reference with an internal gain of 2. FEATURES The AD5666-EP-2 has a 2.5 V, 5 ppm/C reference, giving a full- Enhanced product features scale output of 5 V. The on-board reference is off at power-up, Supports defense and aerospace applications (AQEC) allowing the use of an external reference. The internal reference Military temperature range (55C to +125C) is turned on by writing to the DAC. Controlled manufacturing baseline One assembly/test site The part incorporates a power-on reset circuit that ensures that One fabrication site the DAC output powers up to 0 V (POR pin low) or to midscale Enhanced product change notification (POR pin high) and remains powered up at this level until a valid Qualification data available on request write takes place. The part contains a power-down feature that Low power, quad 16-bit DAC reduces the current consumption of the device to 400 nA at 5 V 14-lead TSSOP and provides software-selectable output loads while in power-down On-chip 1.25 V/2.5 V, 5 ppm/C reference mode for any or all DAC channels. Power down to 400 nA at 5 V, 200 nA at 3 V The outputs of all DACs can be updated simultaneously using the 2.7 V to 5.5 V power supply function, with the added functionality of user-selectable DAC LDAC Guaranteed monotonic by design Power-on reset to zero scale or midscale channels to simultaneously update. There is also an asynchronous CLR that clears all DACs to a software-selectable code0 V, 3 power-down functions Hardware LDAC with LDAC override function midscale, or full scale. CLR function to programmable code The AD5666-EP uses a versatile 3-wire serial interface that operates SDO daisy-chaining option at clock rates of up to 50 MHz and is compatible with standard Rail-to-rail operation SPI, QSPI, MICROWIRE, and DSP interface standards. The on- APPLICATIONS chip precision output amplifier enables rail-to-rail output swing. Process control Additional application and technical information can be found Data acquisition systems in the AD5666 data sheet. Portable battery-powered instruments PRODUCT HIGHLIGHTS Digital gain and offset adjustment 1. Quad, 16-bit DAC. Programmable voltage and current sources 2. On-chip 2.5 V, 5 ppm/C reference. Programmable attenuators 3. Available in 14-lead TSSOP. GENERAL DESCRIPTION 4. Selectable power-on reset to 0 V or midscale. The AD5666-EP is a low power, quad 16-bit, buffered voltage- 5. Power-down capability. When powered down, the DAC output DAC. The part operates from a single 2.7 V to 5.5 V supply typically consumes 200 nA at 3 V and 400 nA at 5 V. and is guaranteed monotonic by design. FUNCTIONAL BLOCK DIAGRAM V /V V REFIN REFOUT DD AD5666-EP 1.25V/2.5V REF LDAC BUFFER INPUT DAC STRING V A OUT REGISTER REGISTER DAC A SCLK BUFFER DAC STRING INPUT V B OUT REGISTER REGISTER DAC B INTERFACE SYNC LOGIC BUFFER INPUT DAC STRING V C OUT REGISTER REGISTER DAC C DIN BUFFER INPUT DAC STRING V D OUT REGISTER REGISTER DAC D SDO POWER-ON POWER-DOWN RESET LOGIC POR GND LDAC CLR Figure 1. Rev. 0 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. 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Trademarks and registered trademarks are the property of their respective owners. 09511-001AD5666-EP TABLE OF CONTENTS Features .............................................................................................. 1 Timing Characteristics .................................................................6 Applications ....................................................................................... 1 Absolute Maximum Ratings ............................................................8 General Description ......................................................................... 1 ESD Caution...................................................................................8 Product Highlights ........................................................................... 1 Pin Configuration and Function Descriptions ..............................9 Functional Block Diagram .............................................................. 1 Typical Performance Characteristics ........................................... 10 Revision History ............................................................................... 2 Outline Dimensions ....................................................................... 16 Specif icat ions ..................................................................................... 3 Ordering Guide .......................................................................... 16 AC Characteristics ........................................................................ 5 REVISION HISTORY 11/10Revision 0: Initial Version Rev. 0 Page 2 of 16