2.7 V to 5.5 V, 250 A, Rail-to-Rail Output TM 16-Bit nanoDAC in a SOT-23 AD5662 FEATURES FUNCTIONAL BLOCK DIAGRAM V V Low power (250 A 5 V) single 16-bit nanoDAC REF GND DD 12-bit accuracy guaranteed POWER-ON Tiny 8-lead SOT-23/MSOP package AD5662 RESET V FB Power-down to 480 nA 5 V, 100 nA 3 V Power-on reset to zero scale/midscale REF(+) DAC OUTPUT V 2.7 V to 5.5 V power supply 16-BIT OUT REGISTER BUFFER DAC Guaranteed 16-bit monotonic by design 3 power-down functions Serial interface with Schmitt-triggered inputs INPUT POWER-DOWN CONTROL RESISTOR CONTROL LOGIC Rail-to-rail operation LOGIC NETWORK SYNC interrupt facility Temperature range 40C to +125C Qualified for automotive applications SYNC SCLK DIN APPLICATIONS Process control Figure 1. Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators GENERAL DESCRIPTION The AD5662, a member of the nanoDAC family, is a low power, The AD5662 uses a versatile 3-wire serial interface that operates single, 16-bit buffered voltage-out DAC that operates from a at clock rates up to 30 MHz, and is compatible with standard single 2.7 V to 5.5 V supply and is guaranteed monotonic by SPI, QSPI, MICROWIRE, and DSP interface standards. design. PRODUCT HIGHLIGHTS The AD5662 requires an external reference voltage to set the output range of the DAC. The part incorporates a power-on 1. 16-bit DAC12-bit accuracy guaranteed. reset circuit that ensures the DAC output powers up to 0 V 2. Available in 8-lead SOT-23 and 8-lead MSOP packages. (AD5662x-1) or to midscale (AD5662x-2), and remains there until a valid write takes place. The part contains a power-down 3. Low power. Typically consumes 0.42 mW at 3 V and feature that reduces the current consumption of the device to 0.75 mW at 5 V. 480 nA at 5 V and provides software-selectable output loads while in power-down mode. 4. Power-on reset to zero scale or to midscale. The low power consumption of this part in normal operation 5. 10 s max settling time. makes it ideally suited to portable battery-operated equipment. The power consumption is 0.75 mW at 5 V, going down to RELATED DEVICES 2.4 W in power-down mode. Part No. Description The AD5662s on-chip precision output amplifier allows rail-to- AD5620/AD5640/AD5660 3 V/5 V 12-/14-/16-bit DAC with rail output swing to be achieved. For remote sensing applications, internal reference in SOT-23 the output amplifiers inverting input is available to the user. Rev. A 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. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Specifications subject to change without notice. No license is granted by implication Tel: 781.329.4700 www.analog.com or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Fax: 781.326.8703 20052010 Analog Devices, Inc. All rights reserved. 04777-001AD5662 TABLE OF CONTENTS Specifications..................................................................................... 3 Power-On Reset.......................................................................... 15 Timing Characteristics..................................................................... 5 Power-Down Modes .................................................................. 16 Absolute Maximum Ratings............................................................ 6 Microprocessor Interfacing ...................................................... 16 ESD Caution.................................................................................. 6 Applications..................................................................................... 18 Pin Configuration and Function Description .............................. 7 Choosing a Reference for the AD5662.................................... 18 Typical Performance Characteristics ............................................. 8 Using a Reference as a Power Supply for the AD5662 .......... 18 Terminology .................................................................................... 13 Bipolar Operation Using the AD5662..................................... 19 Theory of Operation ...................................................................... 14 Using the AD5662 as an Isolated, Programmable, 4-20 mA Process Controller...................................................................... 19 DAC Section................................................................................ 14 Using AD5662 with a Galvanically Isolated Interface........... 20 Resistor String............................................................................. 14 Power Supply Bypassing and Grounding................................ 20 Output Amplifier........................................................................ 14 Outline Dimensions ....................................................................... 21 Serial Interface ............................................................................ 14 Ordering Guide .......................................................................... 22 Input Shift Register .................................................................... 15 Automotive Products................................................................. 22 SYNC Interrupt .......................................................................... 15 REVISION HISTORY 12/10Rev. 0 to Rev. A Changes to Features Section.............................................................1 Changes to Ordering Guide ...........................................................22 Added Automotive Products Section ...........................................22 1/05Revision 0: Initial Version Rev. A Page 2 of 24