SX8722I070LF SEMTECH [Semtech Corporation], SX8722I070LF Datasheet - Page 3

• Manufacturer Part Number: SX8722I070LF
• Description: High gain acquisition for sensor interface
• Manufacturer: SEMTECH [Semtech Corporation]

Section
10.
11.
ACS - Revision 4.2
©2008 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
Table of contents
9.5.
9.6.
9.7.
10.1. ZoomingADC default settings ........................................................................................................................ 38
11.1. Overview ........................................................................................................................................................ 39
11.2. Measurement engine ..................................................................................................................................... 40
11.3. Control registers............................................................................................................................................. 41
11.4. Filtering .......................................................................................................................................................... 43
11.5. Alarms............................................................................................................................................................ 44
11.6. I2C EEPROM................................................................................................................................................. 46
Default configuration.............................................................................................................................................. 38
Advanced configuration ......................................................................................................................................... 39
9.4.2.
9.4.3.
9.4.4.
9.4.5.
9.4.6.
9.4.7.
9.5.1.
9.5.2.
9.6.1.
9.6.2.
9.7.1.
9.7.2.
11.2.1. Overview ................................................................................................................................................. 40
11.2.2. Functional flowchart ................................................................................................................................ 40
11.3.1. SXCtrl1 - SX8722 Control register 1 ....................................................................................................... 41
11.3.2. SXCtrl2 - SX8722 Control register 2 ....................................................................................................... 41
11.3.3. SXCfgEn - Configuration enabling register ............................................................................................. 42
11.3.4. SXUpdated - Updated configuration register .......................................................................................... 42
11.3.5. Configuration register - measurement mode .......................................................................................... 42
11.4.1. Filter types .............................................................................................................................................. 43
11.4.2. Configuration register - filtering............................................................................................................... 43
11.4.3. Filter size register.................................................................................................................................... 44
11.5.1. Configuration register - alarms................................................................................................................ 44
11.5.2. Alarm threshold registers ....................................................................................................................... 44
11.5.3. SXCtrl2 - SX8722 Control register 2 ....................................................................................................... 45
11.6.1. Overview ................................................................................................................................................. 46
11.6.2. Schematic ............................................................................................................................................... 46
Offset cancellation ......................................................................................................................................... 32
ADC parameters ............................................................................................................................................ 35
Measurement engine ..................................................................................................................................... 36
Configuration flow ................................................................................................................................... 29
Enable/disable PGAs .............................................................................................................................. 30
PGA3 gain configuration ......................................................................................................................... 30
PGA2 gain configuration ......................................................................................................................... 30
PGA1 gain configuration ......................................................................................................................... 31
Application example................................................................................................................................ 31
Overview ................................................................................................................................................. 32
Application example................................................................................................................................ 34
Overview ................................................................................................................................................. 35
ADC settings ........................................................................................................................................... 36
Overview ................................................................................................................................................. 36
Measurement engine settings................................................................................................................. 37
October 2008
Page 3
High gain acquisition for sensor interface
DATASHEET
www.semtech.com
SX8722
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