AD8385
TABLE OF CONTENTS
Specifications..................................................................................... 3
DECDRIVER Section .................................................................. 3
Level Shifters ................................................................................. 4
Level Shifting Edge Detector ...................................................... 5
Serial Interface .............................................................................. 5
Power Supplies .............................................................................. 6
Operating Temperature ............................................................... 6
Absolute Maximum Ratings............................................................ 7
ESD Caution.................................................................................. 7
Overload Protection..................................................................... 8
Exposed Paddle............................................................................. 8
Maximum Power Dissipation ..................................................... 8
Operating Temperature Range ................................................... 8
Pin Configuration and Function Descriptions............................. 9
Block Diagrams and Timing Diagrams ....................................... 11
DECDRIVER Section ................................................................ 11
Level Shifters ............................................................................... 13
Level Shifting Edge Detector .................................................... 14
Serial Interface ............................................................................ 15
Functional Description .................................................................. 16
Reference and Control Input .................................................... 16
Output Operating Mode............................................................ 17
Overload Protection................................................................... 17
Serial DACs................................................................................. 17
Theory of Operation...................................................................... 18
Transfer Function and Analog Output Voltage ...................... 18
Accuracy ...................................................................................... 18
Applications..................................................................................... 19
Optimized Reliability with the Thermal Switch..................... 19
Operation in High Ambient Temperature .............................. 20
Power Supply Sequencing ......................................................... 20
VBIAS Generation—V1, V2 Input Pin Functionality ........... 20
Applications Circuit................................................................... 21
PCB Design for Optimized Thermal Performance ............... 21
Thermal Pad Design .................................................................. 21
Thermal Via Structure Design.................................................. 21
AD8385 PCB Design Recommendations ............................... 22
Outline Dimensions....................................................................... 23
Ordering Guide .......................................................................... 23
REVISION HISTORY
1/05—Revision 0: Initial Version
Rev. 0 | Page 2 of 24