True 18-Bit, Voltage Output DAC 0.5 LSB INL, 0.5 LSB DNL Enhanced Product AD5781-EP FEATURES FUNCTIONAL BLOCK DIAGRAM V V V V CC DD REFPF REFPS Single 18-bit DAC, 0.5 LSB INL 7.5 nV/Hz noise spectral density 6.8k 6.8k AD5781-EP 0.05 LSB long-term linearity stability A1 IOV R CC FB R1 R FB <0.05 ppm/C temperature drift INV SDIN INPUT 18 18 1 s settling time SHIFT 18-BIT DAC SCLK V OUT REGISTER DAC REG 1.4 nV-sec glitch impulse AND SYNC CONTROL 20-lead TSSOP package LOGIC SDO Wide power supply range of up to 16.5 V 6k LDAC 35 MHz Schmitt triggered digital interface CLR POWER-ON-RESET 1.8 V compatible digital interface AND CLEAR LOGIC RESET ENHANCED PRODUCT FEATURES DGND V AGND V V SS REFNF REFNS Supports defense and aerospace applications (AQEC standard) Figure 1. Military temperature range (55C to +125C) COMPANION PRODUCTS Controlled manufacturing baseline One assembly/test site Ultra precision op amps: AD8675, AD8676 One fabrication site High voltage op amp: ADA4898-1 Product change notification Additional companion products on the AD5781 product page Qualification data available on request Table 1. Related Devices APPLICATIONS Part No. Description Medical instrumentation AD5791 20-bit, 1 ppm accurate DAC Test and measurement AD5541A/AD5542A 16-bit, 1 LSB accurate 5 V DAC Industrial control Scientific and aerospace instrumentation Data acquisition systems Digital gain and offset adjustment Power supply control GENERAL DESCRIPTION 1 The AD5781-EP is a single 18-bit, unbuffered voltage output state and remains in this state until a valid write to the device digital-to-analog converter (DAC) that operates from a bipolar takes place. supply of up to 33 V. The AD5781-EP accepts a positive reference The part provides an output clamp feature that places the input range of 5 V to VDD 2.5 V and a negative reference input output in a defined load state. range of VSS + 2.5 V to 0 V. The AD5781-EP offers a relative accuracy specification of 0.5 LSB maximum, and operation is The AD5781-EP is available in a compact, 20-lead TSSOP guaranteed monotonic with a 0.5 LSB differential nonlinearity package and operates at the extended automotive temperature (DNL) maximum specification. range of 55C to +125C. Additional application and technical information can be found in the AD5781 data sheet. The part uses a versatile 3-wire serial interface that operates at clock rates of up to 35 MHz and is compatible with standard PRODUCT HIGHLIGHTS serial peripheral interface (SPI), QSPI, MICROWIRE, and 1. True 18-Bit Accuracy. DSP interface standards. The part incorporates a power-on 2. Wide Power Supply Range Up to 16.5 V. reset circuit that ensures that the DAC output powers up to 0 V 3. 55C to +125C Operating Temperature Range. and in a known output impedance 4. Low 7.5 nV/Hz Noise. 5. Low 0.05 ppm/C Temperature Drift. 1 Protected by U.S. Patent No. 8,089,380, and other patents are pending. Rev. B 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. 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 20122018 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com 10454-001AD5781-EP Enhanced Product TABLE OF CONTENTS Features .............................................................................................. 1 Specifications .....................................................................................3 Enhanced Product Features ............................................................ 1 Timing Characteristics .................................................................5 Applications ....................................................................................... 1 Absolute Maximum Ratings ............................................................7 Functional Block Diagram .............................................................. 1 ESD Caution...................................................................................7 Companion Products ....................................................................... 1 Pin Configuration and Function Description ...............................8 General Description ......................................................................... 1 Typical Performance Characteristics ..............................................9 Product Highlights ........................................................................... 1 Outline Dimensions ....................................................................... 17 Revision History ............................................................................... 2 Ordering Guide .......................................................................... 17 REVISION HISTORY 4/2018Rev. A to Rev. B Changes to Features Section and Enhanced Product Features Section ................................................................................................ 1 Changes to Ordering Guide .......................................................... 17 7/2013Rev. 0 to Rev. A Changes to t1 Test Conditions/Comments and Endnote 2 ......... 5 Deleted Figure 4 ................................................................................ 7 2/2012Revision 0: Initial Version Rev. B Page 2 of 17