AD8385

Rev. 0 | Page 2 of 24

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