AD7291_11 AD [Analog Devices], AD7291_11 Datasheet - Page 2

• Manufacturer Part Number: AD7291_11
• Description: 8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor
• Manufacturer: AD [Analog Devices]

AD7291
TABLE OF CONTENTS
Features .............................................................................................. 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 6
Pin Configuration and Function Descriptions ............................. 7
Typical Performance Characteristics ............................................. 8
Terminology .................................................................................... 11
Circuit Information ........................................................................ 12
Internal Register Structure ............................................................ 15
REVISION HISTORY
1/11—Revision 0: Initial Version
I
Thermal Resistance ...................................................................... 6
ESD Caution .................................................................................. 6
Converter Operation .................................................................. 12
Analog Input ............................................................................... 12
ADC Transfer Function ............................................................. 13
Temperature Sensor Operation ................................................ 13
Temperature Sensor Averaging ................................................. 13
V
The Internal or External Reference .......................................... 14
Reset ............................................................................................. 14
2
C Timing Specifications ............................................................ 5
DRIVE
............................................................................................ 14
Rev. 0 | Page 2 of 28
I
Writing to the AD7291 .................................................................. 22
Reading Data From the AD7291 .................................................. 23
Modes of Operation ....................................................................... 24
Outline Dimensions ....................................................................... 27
2
C Interface .................................................................................... 21
Address Pointer Register ........................................................... 15
Command Register (0x00) ........................................................ 17
Voltage Conversion Result Register (0x01) ............................ 18
T
T
Limit Registers (0x04 to 0x1E) ................................................. 19
Hysteresis Register ..................................................................... 20
Alert Status Register A and Alert Status Register B (0x1F and
0x20) ............................................................................................. 20
Serial Bus Address Byte ............................................................. 21
General I
Writing Two Bytes of Data to a 16-Bit Register ..................... 22
Writing to Multiple Registers .................................................... 22
Reading Two Bytes of Data from a 16-Bit Register ............... 23
Command Mode ........................................................................ 24
Autocycle Mode .......................................................................... 26
Ordering Guide .......................................................................... 27
SENSE
SENSE
Conversion Result Register (0x02) ................................ 18
Average Result Register (0x03) ...................................... 19
2
C Timing .................................................................... 21