AD7998BRU-0REEL Analog Devices Inc, AD7998BRU-0REEL Datasheet - Page 2
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AD7998BRU-0REEL
Manufacturer Part Number
AD7998BRU-0REEL
Description
IC,Data Acquisition System,8-CHANNEL,12-BIT,TSSOP,20PIN,PLASTIC
Manufacturer
Analog Devices Inc
Datasheet
1.AD7997BRUZ-1.pdf
(32 pages)
Specifications of AD7998BRU-0REEL
Number Of Bits
12
Sampling Rate (per Second)
188k
Data Interface
I²C, Serial
Number Of Converters
1
Power Dissipation (max)
2.2mW
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-TSSOP (0.173", 4.40mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With
EVAL-AD7998CBZ - BOARD EVALUATION FOR AD7998CBZ
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
AD7997/AD7998
TABLE OF CONTENTS
AD7997 Specifications..................................................................... 3
AD7998 Specifications..................................................................... 5
I
Absolute Maximum Ratings............................................................ 9
Pin Configuration and Pin Function Descriptions.................... 10
Terminology .................................................................................... 11
Typical Performance Characteristics ........................................... 12
Circuit Information ........................................................................ 15
Internal Register Structure ............................................................ 18
Serial Interface ................................................................................ 23
REVISION HISTORY
9/04—Revision 0: Initial Version
2
C Timing Specifications ................................................................ 7
ESD Caution.................................................................................. 9
Converter Operation.................................................................. 15
Typical Connection Diagram ................................................... 16
Analog Input ............................................................................... 16
Address Pointer Register ........................................................... 18
Configuration Register .............................................................. 19
Conversion Result Register ....................................................... 20
Limit Registers ............................................................................ 20
Alert Status Register (CH1 to CH4) ........................................ 21
Cycle Timer Register.................................................................. 22
Sample Delay and Bit Trial Delay............................................. 22
Rev. 0 | Page 2 of 32
Writing to the AD7997/AD7998 .................................................. 24
Reading Data from the AD7997/AD7998................................... 26
ALERT/BUSY Pin .......................................................................... 27
Modes of Operation ....................................................................... 28
Outline Dimensions ....................................................................... 31
Serial Bus Address ...................................................................... 23
Writing to the Address Pointer Register for a Subsequent
Read.............................................................................................. 24
Writing a Single Byte of Data to the Alert Status Register or
Cycle Register.............................................................................. 24
Writing Two Bytes of Data to a Limit, Hysteresis, or
Configuration Register .............................................................. 24
SMBus ALERT ............................................................................ 27
BUSY ............................................................................................ 27
Placing the AD7997-1/AD7998-1 into High Speed Mode ... 27
The Address Select (AS) Pin ..................................................... 27
Mode 1—Using the CONVST Pin ........................................... 28
Mode 2 – COMMAND MODE ............................................... 29
Mode 3—Automatic Cycle Interval Mode.............................. 30
Ordering Guide .......................................................................... 31
Related Parts in I
2
C-Compatible ADC Product Family........ 31