AD1939

Data Sheet

Rev. E | Page 2 of 32

TABLE OF CONTENTS

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

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

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

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

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

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

Test Conditions............................................................................. 3

Analog Performance Specifications ........................................... 3

Crystal Oscillator Specifications................................................. 4

Digital Input/Output Specifications........................................... 5

Power Supply Specifications........................................................ 5

Digital Filters................................................................................. 6

Timing Specifications .................................................................. 6

Absolute Maximum Ratings............................................................ 8

Thermal Resistance ...................................................................... 8

ESD Caution.................................................................................. 8

Pin Configuration and Function Descriptions............................. 9

Typical Performance Characteristics ........................................... 11

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

Analog-to-Digital Converters (ADCs).................................... 13

Digital-to-Analog Converters (DACs).................................... 13

Clock Signals............................................................................... 13

Reset and Power-Down ............................................................. 14

Serial Control Port ..................................................................... 14

Power Supply and Voltage Reference....................................... 15

Serial Data Ports—Data Format............................................... 15

Time-Division Multiplexed (TDM) Modes............................ 15

Daisy-Chain Mode..................................................................... 19

Control Registers ............................................................................ 24

Definitions................................................................................... 24

PLL and Clock Control Registers............................................. 24

DAC Control Registers.............................................................. 25

ADC Control Registers.............................................................. 27

Additional Modes....................................................................... 29

Application Circuits ....................................................................... 30

Outline Dimensions....................................................................... 31

Ordering Guide .......................................................................... 31

Automotive Products................................................................. 31

REVISION HISTORY

2/13—Rev. D to Rev. E

Changes to Serial Control Port Section........................................14

7/11—Rev. C to Rev. D

Changes to Pin 15, Pin 18, Pin 19, and Pin 20 Descriptions ...... 9

Changes to Pin 26 and Pin 27 Descriptions................................ 10

9/10—Rev. B to Rev. C

Added Qualified for Automotive Applications to the Features

Section................................................................................................ 1

Changed Case Temperature from 130°C to 125°C ...................... 4

Changes to Ordering Guide .......................................................... 31

Added Automotive Products Section .......................................... 31

3/10—Rev. A to Rev. B

Changes to Ordering Guide.......................................................... 31

6/07—Rev. 0 to Rev. A

Change to Figure 1 ............................................................................1

Changes to Figure 2...........................................................................9

Changes to Table 10 ..........................................................................9

Changes to Table 11 ....................................................................... 14

Changes to Table 12 ....................................................................... 16

Changes to Figure 24 and Figure 25............................................. 22

Changes to Table 13 ....................................................................... 23

Change to Figure 26 ....................................................................... 23

Changes to Table 15 and Table 16 ................................................ 24

Changes to Figure 27 and Figure 28............................................. 29

Change to Figure 30 ....................................................................... 30

Updated Outline Dimensions....................................................... 31

Changes to Ordering Guide.......................................................... 31

7/06—Revision 0: Initial Version