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AD7294 Datasheet(PDF) 2 Page - Analog Devices

Part No. AD7294
Description  12-Bit, Multichannel, DAC/ADC Temperature Sensor and Current Sense for Monitor and Control Applications
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD7294 Datasheet(HTML) 2 Page - Analog Devices

 
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AD7294
Preliminary Technical Data
Rev. PrB | Page 2 of 45
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
DAC Specifications....................................................................... 3
ADC Specifications ...................................................................... 4
General Specifications ................................................................. 7
Timing Characteristics,................................................................ 8
Absolute Maximum Ratings............................................................ 9
ESD Caution.................................................................................. 9
Pin Configuration and Function Descriptions........................... 10
Terminology .................................................................................... 12
System Description......................................................................... 13
ADC Information....................................................................... 14
ADC Operation .......................................................................... 14
ADC Transfer Functions ........................................................... 14
Analog Inputs.............................................................................. 15
Digital Inputs .............................................................................. 17
VDRIVE ............................................................................................ 17
DAC Operation........................................................................... 18
Current Sensor............................................................................ 19
Temperature Sensor ................................................................... 20
Reference for ADC/DAC........................................................... 21
Analog Comparator Loop ......................................................... 22
Applications..................................................................................... 23
Typical RF Front-End Application........................................... 23
Gain Control Of PA ................................................................... 24
Analog Comparator Loop ......................................................... 24
Register Setting ............................................................................... 25
Address Point Register............................................................... 25
ADC Channel Allocation.......................................................... 25
Command Register .................................................................... 26
Result Register ............................................................................ 26
TSENSE1, TSENSE2 Result Registers................................................ 28
TSENSEINT Result Register .......................................................... 28
TSENSE Offset Registers ................................................................ 28
Alert Status Registers ................................................................. 28
Channel Sequence Register....................................................... 28
Configuration Register .............................................................. 28
Sample Delay and Bit Trial Delay............................................. 30
Power-Down Register ................................................................ 30
DATAHIGH/DATALOW Register ................................................... 30
Hysteresis Registers.................................................................... 31
Serial Bus Interface......................................................................... 32
General I2C Timing.................................................................... 32
Serial Bus Address Byte ............................................................. 33
Writing/Reading to the AD7294 .............................................. 34
Modes Of Operation ...................................................................... 40
Mode 1 – Command Mode....................................................... 40
Mode 2 – Autocycle Mode ........................................................ 41
Layout and Configuration............................................................. 42
Power Supply Bypassing and Grounding................................ 42
Evaluation Board For the AD7294............................................... 43
Outline Dimensions ....................................................................... 47
REVISION HISTORY
10/05—Revision PrA: Preliminary Version


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