AD7992 Analog Devices, AD7992 Datasheet - Page 2

• Manufacturer Part Number: AD7992
• Description: 2-Channel, 12-Bit ADC with I2C Compatible Interface in 10-Lead MSOP
• Manufacturer: Analog Devices

Specifications of AD7992

• Resolution (bits): 12bit
• # Chan: 2
• Sample Rate: 79kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref),Uni Vdd
• Adc Architecture: SAR
• Pkg Type: SOP

AD7992
TABLE OF CONTENTS
Specifications..................................................................................... 3
I
Absolute Maximum Ratings............................................................ 7
Pin Configuration and Pin Function Descriptions...................... 8
Terminology ...................................................................................... 9
Typical Performance Characteristics ........................................... 10
Circuit Information ........................................................................ 13
Internal Register Structure ............................................................ 16
REVISION HISTORY
1/05—Revision 0: Initial Version
2
C Timing Specifications ................................................................ 5
ESD Caution.................................................................................. 7
Converter Operation.................................................................. 13
Typical Connection Diagram ................................................... 14
Analog Input ............................................................................... 14
Address Pointer Register ........................................................... 16
Configuration Register .............................................................. 17
Conversion Result Register ....................................................... 18
Limit Registers ............................................................................ 18
Alert Status Register................................................................... 19
Cycle Timer Register.................................................................. 19
Sample Delay and Bit Trial Delay............................................. 19
Rev. 0 | Page 2 of 28
Serial Interface ................................................................................ 20
Writing to the AD7992 .................................................................. 21
Reading Data from the AD7992................................................... 23
ALERT/BUSY Pin .......................................................................... 24
Modes of Operation ....................................................................... 25
Outline Dimensions ....................................................................... 28
Serial Bus Address...................................................................... 20
Writing to the Address Pointer Register for a Subsequent
Read.............................................................................................. 21
Writing a Single Byte of Data to the Alert Status Register,
Cycle Register, or Configuration Register............................... 21
Writing Two Bytes of Data to a Limit Register or Hysteresis
Register ........................................................................................ 22
SMBus ALERT............................................................................ 24
Placing the AD7992-1 into High Speed Mode....................... 24
The Address Select (AS) Pin ..................................................... 24
Mode 1—Using the CONVST Pin ........................................... 25
Mode 2 – Command mode....................................................... 26
Mode 3—Automatic Cycle Mode............................................. 27
Ordering Guide .......................................................................... 28