AD5381
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Hardware Functions....................................................................... 26
Reset Function ............................................................................ 26
Asynchronous Clear Function.................................................. 26
Integrated Functions ........................................................................ 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
General Description......................................................................... 4
Specifications..................................................................................... 5
AD5381-5 Specifications............................................................. 5
AD5381-3 Specifications............................................................. 7
AC Characteristics........................................................................ 8
Timing Characteristics..................................................................... 9
Serial Interface Timing ................................................................ 9
I2C Serial Interface Timing........................................................ 11
Parallel Interface Timing........................................................... 12
Absolute Maximum Ratings.......................................................... 14
ESD Caution................................................................................ 14
Pin Configuration and Function Descriptions........................... 15
Terminology .................................................................................... 18
Typical Performance Characteristics ........................................... 19
Functional Description.................................................................. 22
DAC Architecture—General..................................................... 22
Data Decoding ............................................................................ 22
On-Chip Special Function Registers (SFR) ............................ 23
SFR Commands.......................................................................... 23
and
Functions...................................................... 26
LDAC
BUSY
FIFO Operation in Parallel Mode............................................ 26
Power-On Reset.......................................................................... 26
Power-Down ............................................................................... 26
Interfaces.......................................................................................... 27
DSP-, SPI-, MICROWIRE-Compatible Serial Interfaces ..... 27
I2C Serial Interface ..................................................................... 29
Parallel Interface......................................................................... 31
Microprocessor Interfacing....................................................... 32
Applications Information .............................................................. 34
Power Supply Decoupling ......................................................... 34
Power Supply Sequencing ......................................................... 34
Typical Configuration Circuit .................................................. 35
Monitor Function....................................................................... 36
Toggle Mode Function............................................................... 36
Thermal Monitor Function....................................................... 36
Optical Attenuators.................................................................... 37
Utilizing FIFO............................................................................. 37
Outline Dimensions....................................................................... 38
Ordering Guide .......................................................................... 38
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