Dual, Current-Output, Serial-Input, 16-/14-Bit DACs Data Sheet AD5545/AD5555 FEATURES FUNCTIONAL BLOCK DIAGRAM V A V B REF REF 16-bit resolution AD5545 14-bit resolution AD5555 16 OR 14 V DD R A FB 1 LSB DNL monotonic D0..DX INPUT DAC A SDI I A DAC A OUT 1 LSB INL REGISTER REGISTER R R A A GND 2 mA full-scale current 20%, with V = 10 V REF R B FB 0.5 s settling time CS INPUT DAC B DAC B I B OUT EN REGISTER REGISTER R R 2Q multiplying reference-input 6.9 MHz BW CLK A B GND DAC A Zero or midscale power-up preset B POWER- ADDR AD5545/ Zero or midscale dynamic reset ON DECODE AD5555 RESET 3-wire interface Compact 16-lead TSSOP package 02918-0-001 DGND RS MSB LDAC Figure 1. APPLICATIONS Automatic test equipment Instrumentation Digitally controlled calibration Industrial control PLCs Programmable attenuator PRODUCT OVERVIEW The AD5545/AD5555 are 16-bit/14-bit, current-output, digital- to-analog converters designed to operate from a 4.5 V to 5.5 V supply range. An external reference is needed to establish the full-scale output-current. An internal feedback resistor (RFB) enhances the resistance and temperature tracking when combined with an external op amp to complete the I-to-V conversion. A serial data interface offers high speed, 3-wire microcontroller compatible inputs using serial data in (SDI), clock (CLK), and CS LDAC chip select ( ). Additional function allows simultaneous update operation. The internal reset logic allows power-on preset and dynamic reset at either zero or midscale, depending on the state of the MSB pin. The AD5545/AD5555 are packaged in the compact TSSOP-16 package and can be operated from 40C to +85C. Rev. I 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. 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Technical Support www.analog.com AD5545/AD5555 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Layout and Power Supply Bypassing ....................................... 11 Applications ....................................................................................... 1 Grounding ................................................................................... 11 Product Overview ............................................................................. 1 Applications Information .............................................................. 12 Functional Block Diagram .............................................................. 1 Stability ........................................................................................ 12 Revision History ............................................................................... 2 Bipolar Output ............................................................................ 12 Specifications ..................................................................................... 3 Programmable Current Source ................................................ 13 Electrical Characteristics ............................................................. 3 DAC with Programmable Input Reference Range ................ 14 Timing Diagrams .......................................................................... 4 Reference Selection .................................................................... 15 Absolute Maximum Ratings ............................................................ 5 Amplifier Selection .................................................................... 15 ESD Caution .................................................................................. 5 Evaluation Board for the AD5545 ................................................ 17 Pin Configuration and Function Descriptions ............................. 6 System Demonstration Platform .............................................. 17 Typical Performance Characteristics ............................................. 7 Operating the Evaluation Board .............................................. 17 Theory of Operation ........................................................................ 9 Evaluation Board Schematics ................................................... 18 Digital-to-Analog Converter ...................................................... 9 Evaluation Board Layout ........................................................... 21 Serial Data Interface ................................................................... 10 Outline Dimensions ....................................................................... 23 Power-Up Sequence ................................................................... 11 Ordering Guide .......................................................................... 23 REVISION HISTORY 1/16Rev. H to Rev. I Added Figure 29 ............................................................................. 20 Added Evaluation Board Layout Section, Figure 30, and Deleted Positive Voltage Output Section and Figure 22 Renumbered Section ...................................................................... 12 Figure 31, ......................................................................................... 21 Changes to Ordering Guide .......................................................... 23 Added Figure 32 ............................................................................. 22 Changes to Ordering Guide .......................................................... 23 4/14Rev. G to Rev. H Change to Interface Timing Parameter, Table 1 ........................... 3 3/11Rev. B to Rev. C Change to Equation 4, Bipolar Output Section .......................... 12 4/13Rev. F to Rev. G 4/10Rev. A to Rev. B Changes to Product Overview Section .......................................... 1 Changes to Ordering Guide .......................................................... 23 Changes to 2Q Multiplying Reference Input ................................. 1 Changes to AC Characteristics and Endnote 3 in Table 1 ........... 4 2/13Rev. E to Rev. F Changes to Figure 13 and Figure 15 ............................................... 8 Change to VDD Pin Description, Table 3 ..................................... 6 Added Reference Selection Section, Amplifier Selection Section, Changed ADA4899 to ADA4899-1, Table 12 ............................. 16 and Table 10 .................................................................................... 15 Changes to Ordering Guide .......................................................... 23 Added Table 11 and Table 12 ........................................................ 16 Changes to Ordering Guide .......................................................... 17 12/11Rev. D to Rev. E Added Figure 13 Renumbered Sequentially ................................ 8 9/09Rev. 0 to Rev. A Changes to Features Section ............................................................ 1 5/11Rev. C to Rev. D Changes to Static Performance, Relative Accuracy, AD5545C Added Evaluation Board for the AD5545 Section, System Parameter, Table 1 ............................................................................. 3 Demonstration Platform Section, and Operating the Evaluation Moved ESD Caution.......................................................................... 5 Board Section .................................................................................. 17 Changes to Ordering Guide .......................................................... 16 Added Figure 25 and Figure 26 Renumbered Sequentially ..... 17 Added Evaluation Board Schematics Section, Figure 27 .......... 18 7/03Revision 0: Initial Version Added Figure 28 .............................................................................. 19 Rev. I Page 2 of 23