Datasheet AD7992 (Analog Devices) - 3

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AD7992 TABLE OF CONTENTS
Specifications... 3 Serial Interface .. 20 I2C Timing Specifications .. 5 Serial Bus Address.. 20 Absolute Maximum Ratings.. 7 Writing to the AD7992 .. 21 ESD Caution.. 7 Writing to the Address Pointer Register for a Subsequent Read.. 21 Pin Configuration and Pin Function Descriptions.. 8 Writing a Single Byte of Data to the Alert Status Register, Terminology .. 9 Cycle Register, or Configuration Register... 21 Typical Performance Characteristics ... 10 Writing Two Bytes of Data to a Limit Register or Hysteresis Circuit Information .. 13 Register .. 22 Converter Operation.. 13 Reading Data from the AD7992... 23 Typical Connection Diagram ... 14 ALERT/BUSY Pin .. 24 Analog Input ... 14 SMBus ALERT.. 24 Internal Register Structure .. 16 Placing the AD7992-1 into High Speed Mode... 24 Address Pointer Register ... 16 The Address Select (AS) Pin ... 24 Configuration Register .. 17 Modes of Operation ... 25 Conversion Result Register ... 18 Mode 1—Using the CONVST Pin ... 25 Limit Registers .. 18 Mode 2 – Command mode... 26 Alert Status Register... 19 Mode 3—Automatic Cycle Mode... 27 Cycle Timer Register.. 19 Outline Dimensions ... 28 Sample Delay and Bit Trial Delay... 19 Ordering Guide .. 28
REVISION HISTORY 1/05—Revision 0: Initial Version
Rev. 0 | Page 2 of 28 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS I2C TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND PIN FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT INFORMATION CONVERTER OPERATION TYPICAL CONNECTION DIAGRAM ANALOG INPUT INTERNAL REGISTER STRUCTURE ADDRESS POINTER REGISTER CONFIGURATION REGISTER CONVERSION RESULT REGISTER LIMIT REGISTERS ALERT STATUS REGISTER CYCLE TIMER REGISTER SAMPLE DELAY AND BIT TRIAL DELAY SERIAL INTERFACE SERIAL BUS ADDRESS WRITING TO THE AD7992 WRITING TO THE ADDRESS POINTER REGISTER FOR A SUBSEQUENT REA WRITING A SINGLE BYTE OF DATA TO THE ALERT STATUS REGISTER, WRITING TWO BYTES OF DATA TO A LIMITREGISTER OR HYSTERESIS READING DATA FROM THE AD7992 ALERT/BUSY PIN SMBus ALERT PLACING THE AD7992-1 INTO HIGH SPEED MODE THE ADDRESS SELECT (AS) PIN MODES OF OPERATION MODE 1—USING THE /CONVST PIN MODE 2 – COMMAND MODE MODE 3—AUTOMATIC CYCLE MODE OUTLINE DIMENSIONS ORDERING GUIDE