ZHCSRW7
march 2023
AFE781H1
,
AFE881H1
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Timing Requirements
6.7
Timing Diagrams
6.8
Typical Characteristics: VOUT DAC
6.9
Typical Characteristics: ADC
6.10
Typical Characteristics: Reference
6.11
Typical Characteristics: HART Modem
6.12
Typical Characteristics: Power Supply
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Digital-to-Analog Converter (DAC) Overview
7.3.1.1
DAC Resistor String
7.3.1.2
DAC Buffer Amplifier
7.3.1.3
DAC Transfer Function
7.3.1.4
DAC Gain and Offset Calibration
7.3.1.5
Programmable Slew Rate
7.3.1.6
DAC Register Structure and CLEAR State
7.3.2
Analog-to-Digital Converter (ADC) Overview
7.3.2.1
ADC Operation
7.3.2.2
ADC Custom Channel Sequencer
7.3.2.3
ADC Synchronization
7.3.2.4
ADC Offset Calibration
7.3.2.5
External Monitoring Inputs
7.3.2.6
Temperature Sensor
7.3.2.7
Self-Diagnostic Multiplexer
7.3.2.8
ADC Bypass
7.3.3
Programmable Out-of-Range Alarms
7.3.3.1
Alarm-Based Interrupts
7.3.3.2
Alarm Action Configuration Register
7.3.3.3
Alarm Voltage Generator
7.3.3.4
Temperature Sensor Alarm Function
7.3.3.5
Internal Reference Alarm Function
7.3.3.6
ADC Alarm Function
7.3.3.7
Fault Detection
7.3.4
IRQ
7.3.5
HART Interface
7.3.5.1
FIFO Buffers
7.3.5.1.1
FIFO Buffer Access
7.3.5.1.2
FIFO Buffer Flags
7.3.5.2
HART Modulator
7.3.5.3
HART Demodulator
7.3.5.4
HART Modem Modes
7.3.5.4.1
Half-Duplex Mode
7.3.5.4.2
Full-Duplex Mode
7.3.5.5
HART Modulation and Demodulation Arbitration
7.3.5.5.1
HART Receive Mode
7.3.5.5.2
HART Transmit Mode
7.3.5.6
HART Modulator Timing and Preamble Requirements
7.3.5.7
HART Demodulator Timing and Preamble Requirements
7.3.5.8
IRQ Configuration for HART Communication
7.3.5.9
HART Communication Using the SPI
7.3.5.10
HART Communication Using UART
7.3.5.11
Memory Built-In Self-Test (MBIST)
7.3.6
Internal Reference
7.3.7
Integrated Precision Oscillator
7.3.8
One-Time Programmable (OTP) Memory
7.4
Device Functional Modes
7.4.1
DAC Power-Down Mode
7.4.2
Reset
7.5
Programming
7.5.1
Communication Setup
7.5.1.1
SPI Mode
7.5.1.2
UART Mode
7.5.1.3
SPI Plus UART Mode
7.5.1.4
HART Functionality Setup Options
7.5.2
Serial Peripheral Interface (SPI)
7.5.2.1
SPI Frame Definition
7.5.2.2
SPI Read and Write
7.5.2.3
Frame Error Checking
7.5.2.4
Synchronization
7.5.3
UART Interface
7.5.3.1
UART Break Mode (UBM)
7.5.3.1.1
Interface With FIFO Buffers and Register Map
7.5.4
Status Bits
7.5.5
Watchdog Timer
7.6
Register Maps
7.6.1
AFEx81H1 Registers
8
Application and Implementation
8.1
Application Information
8.1.1
Multichannel Configuration
8.2
Typical Application
8.2.1
4-mA to 20-mA Current Transmitter
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Start-Up Circuit
8.2.1.2.2
Current Loop Control
8.2.1.2.3
Input Protection and Rectification
8.2.1.2.4
System Current Budget
8.2.1.3
Application Curves
8.3
Initialization Set Up
8.4
Power Supply Recommendations
8.5
Layout
8.5.1
Layout Guidelines
8.5.2
Layout Example
9
Device and Documentation Support
9.1
Documentation Support
9.1.1
Related Documentation
9.2
接收文档更新通知
9.3
支持资源
9.4
Trademarks
9.5
静电放电警告
9.6
术语表
10
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
RRU|24
MPQF588
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsrw7_oa
zhcsrw7_pm
1
特性
提供功能安全
可提供用于功能安全系统设计的文档:
AFE881H1
、
AFE781H1
低静态电流:180µA(典型值)
符合
HART®
标准的物理层调制解调器
16 位或 14 位单调高性能 DAC
1.8V 电源:0.15V 至 1.25V,0.2V 至 1.0V
5V 电源:0.3V 至 2.5V,0.4V 至 2.0V
16 位时为 4-LSB INL
40°C 至 +125°C 范围内的 TUE 为 0.07% FSR(最大值)
可实现高级诊断的 12 位 3.84kSPS ADC
集成 1.25V 基准电压,温漂为 10ppm/°C(最大值)
具有时钟输出的内部 1.2288MHz 振荡器
数字接口
串行外设接口 (SPI):DAC 和 HART 的共享总线
通用异步接收器/发送器 (UART):DAC 和 HART 的共享总线
两种:用于 DAC 的 SPI 和用于 HART 的 UART
故障检测:CRC 位错误检查、窗口式看门狗计时器、诊断 ADC
数字 DAC 压摆率控制
宽工作温度范围:–55°C 至 +125°C
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