Datasheet

AD5280/AD5282
Rev. C | Page 2 of 28
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagrams ............................................................. 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3 
Electrical Characteristics ............................................................. 3
Absolute Maximum Ratings ............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution .................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
Typical Performance Characteristics ............................................. 7
Test Circuits ..................................................................................... 12
Theory of Operation ...................................................................... 14
Rheostat Operation .................................................................... 14
Potentiometer Operation........................................................... 14
Digital Interface .............................................................................. 16
2-Wire Serial Bus ........................................................................ 16
Readback RDAC Value .............................................................. 17
Additional Programmable Logic Output ................................ 17
Self-Contained Shutdown Function and Programmable
Preset ............................................................................................ 17

Multiple Devices on One Bus ................................................... 17
Level Shift for Bidirectional Interface ...................................... 18
Level Shift for Negative Voltage Operation ............................ 18
ESD Protection ........................................................................... 18
Terminal Voltage Operating Range ......................................... 18
Power-Up Sequence ................................................................... 18
Layout and Power Supply Bypassing ....................................... 19
Applications Information .............................................................. 20
Bipolar DC or AC Operation from Dual Supplies ................. 20
Gain Control Compensation .................................................... 20
15 V, 8-Bit I
2
C DAC .................................................................... 20
8-Bit Bipolar DAC ...................................................................... 21
Bipolar Programmable Gain Amplifier ................................... 21
Programmable Voltage Source with Boosted Output ........... 21
Programmable Current Source ................................................ 22
Programmable Bidirectional Current Source ......................... 22
Programmable Low-Pass Filter ................................................ 23
Programmable Oscillator .......................................................... 23
RDAC Circuit Simulation Model ............................................. 24
Macro Model Net List for RDAC ............................................. 24
Outline Dimensions ....................................................................... 25
Ordering Guide .......................................................................... 26
REVISION HISTORY
7/09—Rev. B to Rev. C
Changes to Features Section............................................................ 1
Updated Outline Dimensions, RU-14 ......................................... 25
Changes to Ordering Guide .......................................................... 26
8/07—Rev. A to Rev. B
Updated Operating Temperature Range Throughout ................... 1
Changes to the Features Section ....................................................... 1
Changes to the General Description Section .................................. 1
Changes to Table 2 .............................................................................. 3
Added the Thermal Resistance Section ........................................... 5
Changes to the Ordering Guide ...................................................... 26
11/05—Rev. 0 to Rev. A
Updated Format ................................................................... Universal
Updated Outline Dimensions ......................................................... 26
Changes to Ordering Guide ............................................................ 27
10/02—Revision 0: Initial Version