Table of Contents
1 特性................................................................................... 1
2 应用................................................................................... 1
3 说明................................................................................... 1
4 Revision History.............................................................. 2
5 Pin Configuration and Functions...................................4
6 Specifications.................................................................. 6
6.1 Absolute Maximum Ratings ....................................... 6
6.2 ESD Ratings .............................................................. 6
6.3 Recommended Operating Conditions ........................7
6.4 Thermal Information ...................................................7
6.5 Electrical Characteristics ............................................9
6.6 Timing Requirements ............................................... 11
6.7 Switching Characteristics ......................................... 11
6.8 Timing Diagrams.......................................................12
6.9 Typical Characteristics.............................................. 14
7 Parameter Measurement Information.......................... 19
7.1 Noise Measurements................................................ 19
8 Detailed Description......................................................20
8.1 Overview................................................................... 20
8.2 Functional Block Diagram......................................... 20
8.3 Feature Description...................................................21
8.4 Device Functional Modes..........................................32
8.5 Programming............................................................ 38
8.6 Registers...................................................................48
9 Application and Implementation.................................. 90
9.1 Application Information............................................. 90
9.2 Typical Application.................................................... 97
10 Power Supply Recommendations............................104
10.1 CAP Pin Behavior................................................. 104
10.2 Power-Supply Sequencing....................................104
10.3 Power-Supply Decoupling.....................................104
11 Layout......................................................................... 105
11.1 Layout Guidelines................................................. 105
11.2 Layout Example.................................................... 106
12 Device and Documentation Support........................107
12.1 Documentation Support........................................ 107
12.2 接收文档更新通知................................................. 107
12.3 支持资源................................................................107
12.4 Trademarks...........................................................107
12.5 静电放电警告........................................................ 107
12.6 术语表................................................................... 107
13 Mechanical, Packaging, and Orderable
Information.................................................................. 107
4 Revision History
注：以前版本的页码可能与当前版本的页码不同
Changes from Revision A (December 2019) to Revision B (February 2021) Page
•
更新了整个文档中的表格、图和交叉参考的编号格式
........................................................................................ 1
• 将 WQFN 封装从预发布更改为正在供货............................................................................................................ 1
• 向
高阻抗输入
要点添加了增益 128..................................................................................................................... 1
• 向
应用
部分添加了
保护继电器
和
电能质量监测仪
............................................................................................. 1
• 更改了
应用
部分..................................................................................................................................................1
• 将 WQFN 封装从预发布更改为正在供货............................................................................................................ 1
• Removed capacitor recommendation for REFIN pin in Pin Functions table ......................................................4
• Corrected analog input pin numbering in Pin Functions table ........................................................................... 4
• Added thermal pad to pinout diagram ................................................................................................................4
• Added Differential input voltage range using external reference........................................................................ 7
• Added long-term reference and gain error drift in WQFN package in Electrical Characteristics table............... 9
• Changed t
su(SY)
parameter description in Timing Requirements table..............................................................11
• Changed SPI Timing Diagram and SYNC/RESET Timing Requirements figures............................................ 12
• Added typical characteristics plots....................................................................................................................14
• Removed recommendation for decoupling capacitor when using internal reference....................................... 22
• Changed Clocking and Power Modes section.................................................................................................. 23
• Changed description of modulator frequency and added f
MOD
equation in
ΔΣ
Modulator section.................23
• Changed Digital Filter section...........................................................................................................................23
• Changed Digital Filter Implementation title and section ...................................................................................24
• Updated description of the test signal derived from the internal reference.......................................................27
• Updated description of the test signal derived from the internal reference.......................................................27
• Changed communication cyclic redundancy check (CRC) seed value............................................................ 30
• Added DRDY transitions in Power-Up and Reset section................................................................................ 32
ADS131M08
ZHCSKB8B – OCTOBER 2019 – REVISED FEBRUARY 2021
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