AD7291BCPZ-RL7(Rev0) 데이터 시트보기 (PDF) - Analog Devices

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AD7291BCPZ-RL7
(Rev.:Rev0)

8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor

Analog Devices 

AD7291

TABLE OF CONTENTS

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

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

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

Product Highlights ........................................................................... 1

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

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

I2C Timing Specifications............................................................ 5

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

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

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

Pin Configuration and Function Descriptions............................. 7

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

Terminology .................................................................................... 11

Circuit Information ........................................................................ 12

Converter Operation.................................................................. 12

Analog Input ............................................................................... 12

ADC Transfer Function............................................................. 13

Temperature Sensor Operation ................................................ 13

Temperature Sensor Averaging................................................. 13

VDRIVE ............................................................................................ 14

The Internal or External Reference.......................................... 14

Reset ............................................................................................. 14

Internal Register Structure ............................................................ 15

REVISION HISTORY

1/11—Revision 0: Initial Version

Address Pointer Register ........................................................... 15

Command Register (0x00)........................................................ 17

Voltage Conversion Result Register (0x01) ............................ 18

TSENSE Conversion Result Register (0x02)................................ 18

TSENSE Average Result Register (0x03) ...................................... 19

Limit Registers (0x04 to 0x1E) ................................................. 19

Hysteresis Register ..................................................................... 20

Alert Status Register A and Alert Status Register B (0x1F and

0x20)............................................................................................. 20

I2C Interface .................................................................................... 21

Serial Bus Address Byte ............................................................. 21

General I2C Timing .................................................................... 21

Writing to the AD7291 .................................................................. 22

Writing Two Bytes of Data to a 16-Bit Register ..................... 22

Writing to Multiple Registers.................................................... 22

Reading Data From the AD7291 .................................................. 23

Reading Two Bytes of Data from a 16-Bit Register ............... 23

Modes of Operation ....................................................................... 24

Command Mode ........................................................................ 24

Autocycle Mode.......................................................................... 26

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

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

Rev. 0 | Page 2 of 28

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