Datasheet
ADT7316/ADT7317/ADT7318
Rev. B | Page 2 of 44
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Pin Configuration............................................................................. 1
General Description......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Functional Block Diagram .............................................................. 8
DAC AC Characteristics.................................................................. 9
Absolute Maximum Ratings.......................................................... 10
ESD Caution................................................................................ 10
Pin Configuration and Function Descriptions........................... 11
Terminology .................................................................................... 12
Typical Performance Characteristics ........................................... 14
Theory of Operation ...................................................................... 19
Power-Up Calibration................................................................ 19
Conversion Speed....................................................................... 19
Functional Description—Voltage Output ................................... 20
Digital-to-Analog Converters................................................... 20
Digital-to-Analog Section ......................................................... 20
Resistor String............................................................................. 20
DAC External Reference Inputs ............................................... 20
Output Amplifier........................................................................ 21
Thermal Voltage Output ........................................................... 21
Functional Description—Measurement...................................... 23
Temperature Sensor ................................................................... 23
V
DD
Monitoring .......................................................................... 23
On-Chip Reference .................................................................... 24
Round Robin Measurement...................................................... 24
Single-Channel Measurement .................................................. 24
Temperature Measurement Method ........................................ 24
Temperature Value Format ....................................................... 25
Interrupts..................................................................................... 26
Registers........................................................................................... 27
Register Descriptions................................................................. 28
Serial Interface ................................................................................ 36
Serial Interface Selection ........................................................... 36
I
2
C Serial Interface ..................................................................... 36
SPI Serial Interface ..................................................................... 37
Layout Considerations................................................................... 41
Outline Dimensions ....................................................................... 42
Ordering Guide .......................................................................... 42
REVISION HISTORY
1/07—Rev. A to Rev. B
Updated Format..................................................................Universal
Changes to Table 3.......................................................................... 10
Changes to Internal T
HIGH
Limit Register (Read/Write)
[Address 0x25] Section .................................................................. 33
Changes to Internal T
LOW
Limit Register (Read/Write)
[Address 0x26] Section .................................................................. 33
Changes to External T
HIGH
Limit Register (Read/Write)
[Address 0x27] Section .................................................................. 33
External T
LOW
Limit Register (Read/Write) [Address 0x28]
Section.............................................................................................. 37
Changes to SPI Interface Section.................................................. 38
Updated Outline Dimensions....................................................... 42
Changes to Ordering Guide .......................................................... 42
6/04—Rev. 0 to Rev. A
U
pdated Format...................................................................... Universal
Internal V
REF
Value Change................................................... Universal
Change to Equation in Thermal Voltage Output Section..............21
Changes to Outline Dimensions .......................................................40
8/03—Revision 0: Initial Version