JAJSEG5A
January 2018 – October 2018
ADS112U04
PRODUCTION DATA.
1
特長
2
アプリケーション
3
概要
Device Images
Kタイプ熱電対温度の測定
4
改訂履歴
5
概要(続き)
6
Pin Configuration and Functions
Pin Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
UART Timing Requirements
7.7
UART Switching Characteristics
7.8
Typical Characteristics
8
Parameter Measurement Information
8.1
Noise Performance
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Multiplexer
9.3.2
Low-Noise Programmable Gain Stage
9.3.2.1
PGA Input Voltage Requirements
9.3.2.2
Bypassing the PGA
9.3.3
Voltage Reference
9.3.4
Modulator and Internal Oscillator
9.3.5
Digital Filter
9.3.6
Conversion Times
9.3.7
Excitation Current Sources
9.3.8
Sensor Detection
9.3.9
System Monitor
9.3.10
Temperature Sensor
9.3.10.1
Converting From Temperature to Digital Codes
9.3.10.1.1
For Positive Temperatures (For Example, 50°C):
9.3.10.1.2
For Negative Temperatures (For Example, –25°C):
9.3.10.2
Converting From Digital Codes to Temperature
9.3.11
Offset Calibration
9.3.12
Conversion Data Counter
9.3.13
Data Integrity
9.3.14
General-Purpose Digital Inputs/Outputs
9.4
Device Functional Modes
9.4.1
Power-Up and Reset
9.4.1.1
Power-On Reset
9.4.1.2
RESET Pin
9.4.1.3
Reset by Command
9.4.2
Conversion Modes
9.4.2.1
Single-Shot Conversion Mode
9.4.2.2
Continuous Conversion Mode
9.4.3
Operating Modes
9.4.3.1
Normal Mode
9.4.3.2
Turbo Mode
9.4.3.3
Power-Down Mode
9.5
Programming
9.5.1
UART Interface
9.5.1.1
Receive (RX)
9.5.1.2
Transmit (TX)
9.5.1.3
Data Ready (DRDY)
9.5.1.4
Protocol
9.5.1.5
Timeout
9.5.2
Data Format
9.5.3
Commands
9.5.3.1
RESET (0000 011x)
9.5.3.2
START/SYNC (0000 100x)
9.5.3.3
POWERDOWN (0000 001x)
9.5.3.4
RDATA (0001 xxxx)
9.5.3.5
RREG (0010 rrrx)
9.5.3.6
WREG (0100 rrrx dddd dddd)
9.5.3.7
Command Latching
9.5.4
Reading Data
9.5.4.1
Manual Data Read Mode
9.5.4.2
Automatic Data Read Mode
9.5.5
Data Integrity
9.6
Register Map
9.6.1
Configuration Registers
9.6.2
Register Descriptions
9.6.2.1
Configuration Register 0 (address = 00h) [reset = 00h]
Table 18.
Configuration Register 0 Field Descriptions
9.6.2.2
Configuration Register 1 (address = 01h) [reset = 00h]
Table 19.
Configuration Register 1 Field Descriptions
9.6.2.3
Configuration Register 2 (address = 02h) [reset = 00h]
Table 21.
Configuration Register 2 Field Descriptions
9.6.2.4
Configuration Register 3 (address = 03h) [reset = 00h]
Table 22.
Configuration Register 3 Field Descriptions
9.6.2.5
Configuration Register 4 (address = 04h) [reset = 00h]
Table 23.
Configuration Register 4 Field Descriptions
10
Application and Implementation
10.1
Application Information
10.1.1
Interface Connections
10.1.2
Analog Input Filtering
10.1.3
External Reference and Ratiometric Measurements
10.1.4
Establishing Proper Limits on the Absolute Input Voltage
10.1.5
Unused Inputs and Outputs
10.1.6
Pseudo Code Example
10.2
Typical Applications
10.2.1
K-Type Thermocouple Measurement (–200°C to +1250°C)
10.2.1.1
Design Requirements
10.2.1.2
Detailed Design Procedure
10.2.1.3
Application Curves
10.2.2
3-Wire RTD Measurement (–200°C to +850°C)
10.2.2.1
Design Requirements
10.2.2.2
Detailed Design Procedure
10.2.2.2.1
Design Variations for 2-Wire and 4-Wire RTD Measurements
10.2.2.3
Application Curves
10.2.3
Resistive Bridge Measurement
10.2.3.1
Design Requirements
10.2.3.2
Detailed Design Procedure
11
Power Supply Recommendations
11.1
Power-Supply Sequencing
11.2
Power-Supply Decoupling
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
13
デバイスおよびドキュメントのサポート
13.1
ドキュメントのサポート
13.1.1
関連資料
13.2
ドキュメントの更新通知を受け取る方法
13.3
コミュニティ・リソース
13.4
商標
13.5
静電気放電に関する注意事項
13.6
Glossary
14
メカニカル、パッケージ、および注文情報
10.2
Typical Applications