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數據轉換器
數位轉類比轉換器 (DAC)
精密 DAC (≤10 MSPS)

DAC8742H

現行

具有 UART/SPI 介面的 HART®、FOUNDATION Fieldbus™ 和 PROFIBUS PA 相容數據機

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產品規格表

DAC8742H

現行
產品規格表 立即訂購

產品詳細資料

Interface type SPI, UART Reference type Ext, Int Rating Catalog Features FOUNDATION Fieldbus MAU, HART Modem, Low Power, Profibus PA Modem Operating temperature range (°C) -55 to 125 Product type Special-function DAC
Interface type SPI, UART Reference type Ext, Int Rating Catalog Features FOUNDATION Fieldbus MAU, HART Modem, Low Power, Profibus PA Modem Operating temperature range (°C) -55 to 125 Product type Special-function DAC
TQFP (PBS) 32 49 mm² (7 mm × 7 mm)
  • HART-Compliant Physical Layer Modem
    • 1200/2200 Hz HART FSK Sinusoids
    • Register Programmable Amplitude of TX Signals
      (DAC8741H / DAC8742H only)
    • Integrated RX Demodulator and Band-Pass Filter with Minimal External Components
  • FOUNDATION Fieldbus Compatible H1 Controller and Medium Attachment Unit (MAU)
    • 31.25 kbit/s Communication Based on Manchester Coded Bus Powered (MBP)
    • Integrated Manchester Encoder and Decoder
    • Compatible with PROFIBUS PA
  • Low Quiescent Current: 180 uA Max at Typical Industrial Operating Temperature Range (-40°C to 85°C)
  • Integrated 1.5-V Reference
  • Flexible Clocking Options
    • Internal Oscillator
    • External Crystal Oscillator
    • External CMOS Clock
  • Digital Interface
    • DAC8742H: UART and SPI
  • Reliability: CRC Bit Error Checking, Watchdog Timer
  • Wide Operating Temperature: –55°C to 125°C
  • 5 mm x 5 mm TQFP Package
  • HART-Compliant Physical Layer Modem
    • 1200/2200 Hz HART FSK Sinusoids
    • Register Programmable Amplitude of TX Signals
      (DAC8741H / DAC8742H only)
    • Integrated RX Demodulator and Band-Pass Filter with Minimal External Components
  • FOUNDATION Fieldbus Compatible H1 Controller and Medium Attachment Unit (MAU)
    • 31.25 kbit/s Communication Based on Manchester Coded Bus Powered (MBP)
    • Integrated Manchester Encoder and Decoder
    • Compatible with PROFIBUS PA
  • Low Quiescent Current: 180 uA Max at Typical Industrial Operating Temperature Range (-40°C to 85°C)
  • Integrated 1.5-V Reference
  • Flexible Clocking Options
    • Internal Oscillator
    • External Crystal Oscillator
    • External CMOS Clock
  • Digital Interface
    • DAC8742H: UART and SPI
  • Reliability: CRC Bit Error Checking, Watchdog Timer
  • Wide Operating Temperature: –55°C to 125°C
  • 5 mm x 5 mm TQFP Package

The DAC8742H is a HART®, FOUNDATION Fieldbus™, and PROFIBUS PA compatible low power modem designed for industrial process control and industrial automation applications.

In HART mode, the DAC8742H integrates all of the required circuitry to operate as half-duplex HART physical layer modems, in either slave or master configurations with minimal external components for filtering. In FOUNDATION Fieldbus mode, the DAC8742H integrates all of the required circuitry to operate as half-duplex FOUNDATION Fieldbus compatible H1 Controllers and MAUs.

The HART, FOUNDATION Fieldbus, or PROFIBUS PA, data stream can be transferred from the microcontroller through either a UART interface or an integrated FIFO accessed by a SPI interface. The SPI interface includes an SDO pin for daisy-chain support, various interrupts, and other extended features.

The DAC8742H is a HART®, FOUNDATION Fieldbus™, and PROFIBUS PA compatible low power modem designed for industrial process control and industrial automation applications.

In HART mode, the DAC8742H integrates all of the required circuitry to operate as half-duplex HART physical layer modems, in either slave or master configurations with minimal external components for filtering. In FOUNDATION Fieldbus mode, the DAC8742H integrates all of the required circuitry to operate as half-duplex FOUNDATION Fieldbus compatible H1 Controllers and MAUs.

The HART, FOUNDATION Fieldbus, or PROFIBUS PA, data stream can be transferred from the microcontroller through either a UART interface or an integrated FIFO accessed by a SPI interface. The SPI interface includes an SDO pin for daisy-chain support, various interrupts, and other extended features.
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DAC8740H 現行 具有 UART 介面的 HART®、FOUNDATION Fieldbus™ 和 PROFIBUS PA 相容數據機 UART-only variant

技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 DAC8742H, HART and FOUNDATION Fieldbus / PROFIBUS PA Modem datasheet PDF | HTML 2018/12/7
應用說明 A Simple, Java-Based CRC Calculator PDF | HTML 2026/3/4
Circuit design Circuit Replacing HART® Modem Device Competitors With the DAC8740H PDF | HTML 2026/1/29
應用說明 HART-Enabled Transmitter Based on an Evaluation Module Design PDF | HTML 2025/3/26
應用說明 Design and Test of a HART-Enabled Field Transmitter for 4-20mA Loops PDF | HTML 2024/10/17
應用說明 A Basic Guide to the HART Protocol PDF | HTML 2023/11/9
Application brief Designing Foundation Fieldbus and Profibus PA Devices with the DAC874xh Modem Fa 2019/3/4
Application brief Implementing HART in PLC Analog Input Modules for Real-Time Communication 2018/11/5
Application brief Implementing HART in 2-Wire Field Sensor-Transmitters 2018/10/3

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

DAC8742HEVM — DAC8742H 評估模組

DAC8742H 評估模組 (EVM) 是一款易於使用的平台，用於評估 DAC8742H 裝置的功能與性能。DAC8740H、DAC8741H 和 DAC8742H 是符合 HART®、FOUNDATION Fieldbus™ 與 PROFIBUS PA 標準的低功耗數據機，專為工業製程控制與工業自動化應用設計。DAC8742HEVM 是一套完整的評估套件，包含 USB2ANY 與評估軟體，支援 Microsoft Windows® XP 及 Windows® 7/8/10 作業系統。

使用指南: PDF
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程式碼範例或展示

SBAC218 — DAC8741H/DAC8742H Register Map Header File

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模擬型號

DAC874XH IBIS Model

SBAM332.ZIP (86 KB) - IBIS 模型
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設計工具

ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
TQFP (PBS) 32 Ultra Librarian
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