Datasheet

AD5757 Data Sheet
Rev. D | Page 2 of 44
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Companion Products ....................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
Detailed Functional Block Diagram .............................................. 4
Specifications ..................................................................................... 5
AC Performance Characteristics ................................................ 7
Timing Characteristics ................................................................ 7
Absolute Maximum Ratings .......................................................... 10
ESD Caution ................................................................................ 10
Pin Configuration and Function Descriptions ........................... 11
Typical Performance Characteristics ........................................... 14
Current Outputs ......................................................................... 14
DC-to-DC Block ......................................................................... 19
Reference ..................................................................................... 20
General ......................................................................................... 21
Terminology .................................................................................... 22
Theory of Operation ...................................................................... 23
DAC Architecture ....................................................................... 23
Power-On State of the AD5757 ................................................ 23
Serial Interface ............................................................................ 23
Transfer Function ....................................................................... 24
Registers ........................................................................................... 25
Programming Sequence to Write/Enable the Output
Correctly ...................................................................................... 26
Changing and Reprogramming the Range ............................. 26
Data Registers ............................................................................. 27
Control Registers ........................................................................ 29
Readback Operation .................................................................. 32
Device Features ............................................................................... 34
Output Fault ................................................................................ 34
Digital Offset and Gain Control ............................................... 34
Status Readback During a Write .............................................. 34
Asynchronous Clear ................................................................... 34
Packet Error Checking ............................................................... 34
Watchdog Timer ......................................................................... 35
Output Alert ................................................................................ 35
Internal Reference ...................................................................... 35
External Current Setting Resistor ............................................ 35
HART ........................................................................................... 35
Digital Slew Rate Control .......................................................... 36
Power Dissipation Control ........................................................ 36
DC-to-DC Converters ............................................................... 36
AI
CC
Supply Requirements—Static .......................................... 38
AI
CC
Supply Requirements—Slewing ...................................... 38
External PMOS Mode ................................................................ 39
Applications Information .............................................................. 40
Current Output Mode with Internal R
SET
................................ 40
Precision Voltage Reference Selection ..................................... 40
Driving Inductive Loads ............................................................ 40
Transient Voltage Protection .................................................... 41
Microprocessor Interfacing ....................................................... 41
Layout Guidelines....................................................................... 41
Galvanically Isolated Interface ................................................. 42
Industrial HART Capable Analog Output
Application .................................................................................. 43
Outline Dimensions ....................................................................... 44
Ordering Guide .......................................................................... 44