2.5 V to 5.5 V, 230 A, Dual Rail-to-Rail, Voltage Output 8-/10-/12-Bit DACs AD5302/AD5312/AD5322 FEATURES GENERAL DESCRIPTION AD5302: Two 8-bit buffered DACs in 1 package The AD5302/AD5312/AD5322 are dual 8-, 10-, and 12-bit A version: 1 LSB INL, B version: 0.5 LSB INL buffered voltage output DACs in a 10-lead MSOP that operate AD5312: Two 10-bit buffered DACs in 1 package from a single 2.5 V to 5.5 V supply, consuming 230 A at 3 V. A version: 4 LSB INL, B version: 2 LSB INL Their on-chip output amplifiers allow the outputs to swing rail- AD5322: Two 12-bit buffered DACs in 1 package to-rail with a slew rate of 0.7 V/s. The AD5302/AD5312/AD5322 A version: 16 LSB INL, B version: 8 LSB INL utilize a versatile 3-wire serial interface that operates at clock 10-lead MSOP rates up to 30 MHz and is compatible with standard SPI, Micropower operation: 300 A 5 V (including QSPI, MICROWIRE, and DSP interface standards. reference current) The references for the two DACs are derived from two reference Power-down to 200 nA 5 V, 50 nA 3 V 2.5 V to 5.5 V power supply pins (one per DAC). The reference inputs can be configured as Double-buffered input logic buffered or unbuffered inputs. The outputs of both DACs can be updated simultaneously using the asynchronous LDAC input. Guaranteed monotonic by design over all codes Buffered/Unbuffered reference input options The parts incorporate a power-on reset circuit, which ensures 0 V to V output voltage that the DAC outputs power-up to 0 V and remain there until a REF valid write takes place to the device. The parts contain a power- Power-on-reset to 0 V down feature that reduces the current consumption of the Simultaneous update of DAC outputs via LDAC devices to 200 nA at 5 V (50 nA at 3 V) and provides software- Low power serial interface with Schmitt-triggered inputs selectable output loads while in power-down mode. On-chip rail-to-rail output buffer amplifiers Qualified for automotive applications The low power consumption of these parts in normal operation makes them ideally suited for portable battery-operated APPLICATIONS equipment. The power consumption is 1.5 mW at 5 V, 0.7 mW Portable battery-powered instruments at 3 V, reducing to 1 W in power-down mode. Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators FUNCTIONAL BLOCK DIAGRAM V V A DD REF POWER-ON AD5302/AD5312/AD5322 RESET INPUT DAC STRING BUFFER VV AA OUOUTT REGISTER REGISTER DAC SYNC INTERFACE POWER-DOWN RESISTOR LOGIC SCLK LOGIC NETWORK DIN INPUT DAC STRING VV BB BUFFER OUOUTT REGISTER DAC REGISTER RESISTOR NETWORK V B GND LDAC REF Figure 1. 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 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 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2006-2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 00928-001AD5302/AD5312/AD5322 TABLE OF CONTENTS Features .............................................................................................. 1 Low Power Serial Interface ....................................................... 15 Applications....................................................................................... 1 Double-Buffered Interface ........................................................ 15 General Description ......................................................................... 1 Power-Down Modes ...................................................................... 16 Functional Block Diagram .............................................................. 1 Microprocessor Interfacing........................................................... 17 Revision History ............................................................................... 2 AD5302/AD5312/AD5322 to ADSP-2101/ADSP-2103 Interface....................................................................................... 17 Specifications..................................................................................... 3 AD5302/AD5312/AD5322 to 68HC11/68L11 Interface ...... 17 AC Specifications.......................................................................... 4 AD5302/AD5312/AD5322 to 80C51/80L51 Interface.......... 17 Timing Characteristics ................................................................ 5 AD5302/AD5312/AD5322 to MICROWIRE Interface ........ 17 Absolute Maximum Ratings............................................................ 7 Applications Information .............................................................. 18 ESD Caution.................................................................................. 7 Typical Application Circuit....................................................... 18 Pin Configuration and Function Descriptions............................. 8 Bipolar Operation Using the AD5302/AD5312/AD5322..... 18 Terminology ...................................................................................... 9 Opto-Isolated Interface for Process Control Applications ... 19 Typical Performance Characteristics ........................................... 10 Decoding Multiple AD5302/AD5312/AD5322s.................... 19 Functional Description .................................................................. 14 AD5302/AD5312/AD5322 as a Digitally Programmable Digital-to-Analog Section ......................................................... 14 Window Detector....................................................................... 19 Resistor String............................................................................. 14 Coarse and Fine Adjustment Using the AD5302/AD5312/AD5322 ....................................................... 20 DAC Reference Inputs ............................................................... 14 Power Supply Bypassing and Grounding................................ 20 Output Amplifier........................................................................ 14 Outline Dimensions....................................................................... 21 Power-On Reset .......................................................................... 14 Ordering Guide .......................................................................... 22 Serial Interface ................................................................................ 15 Input Shift Register..................................................................... 15 REVISION HISTORY 5/11Rev. C to Rev. D Updated Outline Dimensions....................................................... 21 Added Automotive Products Information ................. Throughout Changes to Ordering Guide .......................................................... 21 Updated Outline Dimensions ....................................................... 21 8/03Rev. 0 to Rev. A Changes to Ordering Guide .......................................................... 22 Changes to Features ..........................................................................1 Changes to Specifications.................................................................2 4/06Rev. B to Rev. C Changes to Absolute Maximum Ratings........................................4 Updated Format..................................................................Universal Changes to Ordering Guide .............................................................4 Updated Outline Dimensions ....................................................... 21 Updated Outline Dimensions....................................................... 16 Changes to Ordering Guide .......................................................... 21 12/05Rev. A to Rev. B Updated Format..................................................................Universal Rev. D Page 2 of 24