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
ADS1212 SIMPLIFIED BLOCK DIAGRAM ................................................ 4
ADS1212 PIN CONFIGURATION .............................................................. 4
ADS1212 PIN DEFINITIONS ..................................................................... 4
ADS1213 SIMPLIFIED BLOCK DIAGRAM ................................................ 5
ADS1213P and ADS1213U PIN CONFIGURATION ................................. 5
ADS1213P and ADS1213U PIN DEFINITIONS ........................................ 5
ADS1213E PIN CONFIGURATION ........................................................... 6
ADS1213E 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
®
40
ADS1212, 1213
BB [ BURR-BROWN CORPORATION ]
