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AD7291 数据表(PDF) 2 Page - Analog Devices

部件名 AD7291
功能描述  8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7291 数据表(HTML) 2 Page - Analog Devices

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AD7291
Rev. 0 | Page 2 of 28
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
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
REVISION HISTORY
1/11—Revision 0: Initial Version


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