ADT7317 データシートの表示（PDF） - Analog Devices

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ADT7317

±0.5°C Accurate Digital Temperature Sensor and Quad Voltage Output 12-/10-/8-Bit DACs

Analog Devices 

ADT7316/ADT7317/ADT7318

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

REVISION HISTORY

1/07—Rev. A to Rev. B

Updated Format..................................................................Universal

Changes to Table 3.......................................................................... 10

Changes to Internal THIGH Limit Register (Read/Write)

[Address 0x25] Section .................................................................. 33

Changes to Internal TLOW Limit Register (Read/Write)

[Address 0x26] Section .................................................................. 33

Changes to External THIGH Limit Register (Read/Write)

[Address 0x27] Section .................................................................. 33

External TLOW Limit Register (Read/Write) [Address 0x28]

Section.............................................................................................. 37

Changes to SPI Interface Section.................................................. 38

Updated Outline Dimensions ....................................................... 42

Changes to Ordering Guide .......................................................... 42

Output Amplifier........................................................................ 21

Thermal Voltage Output ........................................................... 21

Functional Description—Measurement...................................... 23

Temperature Sensor ................................................................... 23

VDD 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

I2C Serial Interface ..................................................................... 36

SPI Serial Interface ..................................................................... 37

Layout Considerations................................................................... 41

Outline Dimensions ....................................................................... 42

Ordering Guide .......................................................................... 42

6/04—Rev. 0 to Rev. A

Updated Format...................................................................... Universal

Internal VREF Value Change................................................... Universal

Change to Equation in Thermal Voltage Output Section..............21

Changes to Outline Dimensions .......................................................40

8/03—Revision 0: Initial Version

Rev. B | Page 2 of 44

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