ADN8834

Data Sheet

Rev. B | Page 2 of 27

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 6

Thermal Resistance ...................................................................... 6

ESD Caution.................................................................................. 6

Pin Configurations and Function Descriptions ........................... 7

Typical Performance Characteristics ............................................. 8

Detailed Functional Block Diagram ............................................ 12

Theory of Operation ...................................................................... 13

Analog PID Control................................................................... 14

Digital PID Control.................................................................... 14

Powering the Controller ............................................................ 14

Enable and Shutdown ................................................................ 15

Oscillator Clock Frequency....................................................... 15

Temperature Lock Indicator (LFCSP Only) ........................... 15

Soft Start on Power-Up.............................................................. 15

TEC Voltage/Current Monitor ................................................. 16

Maximum TEC Voltage Limit .................................................. 16

Maximum TEC Current Limit ................................................. 17

Applications Information .............................................................. 18

Signal Flow .................................................................................. 18

Thermistor Setup........................................................................ 18

Thermistor Amplifier (Chopper 1).......................................... 19

PID Compensation Amplifier (Chopper 2)............................ 19

MOSFET Driver Amplifiers...................................................... 20

PWM Output Filter Requirements .......................................... 20

Input Capacitor Selection.......................................................... 21

Power Dissipation....................................................................... 21

PCB Layout Guidelines.................................................................. 23

Block Diagrams and Signal Flow ............................................. 23

Guidelines for Reducing Noise and Minimizing Power Loss .... 23

Example PCB Layout Using Two Layers................................. 24

Outline Dimensions....................................................................... 27

Ordering Guide .......................................................................... 27

REVISION HISTORY

9/18—Rev. A to Rev. B

Added Patent Information............................................................... 1

8/15—Rev. 0 to Rev. A

Added 24-Lead LFCSP.......................................................Universal

Changes to Features Section and Table 1 ...................................... 1

Changes to Table 2............................................................................ 3

Changes to Table 3............................................................................ 6

Added Figure 3; Renumbered Sequentially .................................. 7

Changes to Figure 13........................................................................ 9

Changes to Figure 23 and Figure 24............................................. 11

Changes to Figure 25...................................................................... 12

Changes to Powering the Controller Section and Figure 27

Caption ............................................................................................ 14

Change to Soft Start on Power-Up Section................................. 15

Change to Figure 33 ....................................................................... 18

Changes to Table 7.......................................................................... 21

Added Table 8; Renumbered Sequentially .................................. 21

Updated Outline Dimensions....................................................... 27

Changes to Ordering Guide.......................................................... 27

4/15—Revision 0: Initial Version