TOPIC INDEX
TOPIC
PAGE
TOPIC
PAGE
FEATURES ..................................................................................... 1
APPLICATIONS ............................................................................. 1
DESCRIPTION ............................................................................... 1
SPECIFICATIONS .......................................................................... 2
ABSOLUTE MAXIMUM RATINGS ............................................................. 3
ELECTROSTATIC DISCHARGE SENSITIVITY ........................................ 3
PACKAGE INFORMATION ........................................................................ 3
ORDERING INFORMATION ...................................................................... 3
ADS1210 SIMPLIFIED BLOCK DIAGRAM ................................................ 4
ADS1210 PIN CONFIGURATION .............................................................. 4
ADS1210 PIN DEFINITIONS ..................................................................... 4
ADS1211 SIMPLIFIED BLOCK DIAGRAM ................................................ 5
ADS1211P and ADS1211U PIN CONFIGURATION ................................. 5
ADS1211P and ADS1211U PIN DEFINITIONS ........................................ 5
ADS1211E PIN CONFIGURATION ........................................................... 6
ADS1211E PIN DEFINITIONS ................................................................... 6
TYPICAL PERFORMANCE CURVES ........................................... 7
THEORY OF OPERATION ............................................................ 9
DEFINITION OF TERMS ......................................................................... 10
DIGITAL FILTER ...................................................................................... 11
Filter Equation ....................................................................................... 12
Filter Settling.......................................................................................... 12
TURBO MODE ......................................................................................... 12
PROGRAMMABLE GAIN AMPLIFIER ..................................................... 13
SOFTWARE GAIN ................................................................................... 13
CALIBRATION .......................................................................................... 13
Self-Calibration ...................................................................................... 14
System Offset Calibration ..................................................................... 14
System Full-Scale Calibration ............................................................... 14
Pseudo System Calibration ................................................................... 15
Background Calibration ......................................................................... 15
System Calibration Offset and Full-Scale Calibration Limits ................ 16
SLEEP MODE .......................................................................................... 16
ANALOG OPERATION .................................................................17
ANALOG INPUT ....................................................................................... 17
REFERENCE INPUT ................................................................................ 17
REFERENCE OUTPUT ............................................................................ 17
VBIAS ..................................................................................................................................................... 18
DIGITAL OPERATION ..................................................................18
SYSTEM CONFIGURATION .................................................................... 18
Instruction Register (INSR) ................................................................... 19
Command Register (CMR) .................................................................... 19
Data Output Register (DOR) ................................................................. 21
Offset Calibration Register (OCR) ........................................................ 22
Full-Scale Calibration Register (FCR)................................................... 22
TIMING ..................................................................................................... 22
Synchronizing Multiple Converters ........................................................ 26
SERIAL INTERFACE ............................................................................... 26
Multiple Instructions ............................................................................... 26
Using CS and Continuous Read Mode ................................................ 29
Power-On Conditions for SDIO ............................................................. 29
Master Mode.......................................................................................... 29
Slave Mode............................................................................................ 29
Making Use of DSYNC ......................................................................... 30
Reset, Power-On Reset, and Brown-Out ............................................. 30
Two-Wire Interface ................................................................................ 30
Three-Wire Interface.............................................................................. 30
Four-Wire Interface................................................................................ 30
Multi-Wire Interface ............................................................................... 32
I/O Recovery.......................................................................................... 32
Isolation ................................................................................................. 33
Synchronization of Multiple Converters ................................................ 34
LAYOUT ........................................................................................35
POWER SUPPLIES ................................................................................. 35
GROUNDING............................................................................................ 35
DECOUPLING .......................................................................................... 35
SYSTEM CONSIDERATIONS ................................................................. 35
APPLICATIONS ............................................................................36
ADS1210, ADS1211
40
SBAS034B
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