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

DAC8740H

現行

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

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產品規格表

DAC8740H

現行
產品規格表 立即訂購

產品詳細資料

Interface type UART Features FOUNDATION Fieldbus MAU, HART Modem, Low Power, Profibus PA Modem Reference type Ext, Int Rating Catalog Output range (max) (mA/V) 0.5 Output range (min) (mA/V) 0 Operating temperature range (°C) -55 to 125
Interface type UART Features FOUNDATION Fieldbus MAU, HART Modem, Low Power, Profibus PA Modem Reference type Ext, Int Rating Catalog Output range (max) (mA/V) 0.5 Output range (min) (mA/V) 0 Operating temperature range (°C) -55 to 125
VQFN (RGE) 24 16 mm² 4 x 4
  • HART-compliant physical layer modem
    • 1200-Hz, 2200-Hz HART FSK sinusoids
    • Register programmable amplitude of TX signals (DAC8741H 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 µA 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
    • DAC8740H: UART
    • DAC8741H: SPI
  • Reliability: CRC bit error checking, watchdog timer (DAC8741H only)
  • Wide operating temperature: –55°C to +125°C
  • 4-mm × 4-mm QFN package
  • HART-compliant physical layer modem
    • 1200-Hz, 2200-Hz HART FSK sinusoids
    • Register programmable amplitude of TX signals (DAC8741H 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 µA 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
    • DAC8740H: UART
    • DAC8741H: SPI
  • Reliability: CRC bit error checking, watchdog timer (DAC8741H only)
  • Wide operating temperature: –55°C to +125°C
  • 4-mm × 4-mm QFN package

The DAC8740H and DAC8741H (DAC874xH) are HART®, FOUNDATION Fieldbus™, and PROFIBUS PA compatible low-power modems designed for industrial process control and industrial-automation applications.

In HART mode, the DAC874xH 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 DAC874xH 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 DAC8740H and DAC8741H (DAC874xH) are HART®, FOUNDATION Fieldbus™, and PROFIBUS PA compatible low-power modems designed for industrial process control and industrial-automation applications.

In HART mode, the DAC874xH 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 DAC874xH 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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DAC8742H 現行 具有 UART/SPI 介面的 HART®、FOUNDATION Fieldbus™ 和 PROFIBUS PA 相容數據機 More interfacing options, SPI and UART version

技術文件

star =TI 所選的此產品重要文件
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類型 標題 日期
* Data sheet DAC874xH HART® and FOUNDATION Fieldbus™ and PROFIBUS PA Modems datasheet (Rev. D) PDF | HTML 2019年 5月 2日
Product overview How to Connect Multiple Field Devices for Hart Communication PDF | HTML 2024年 3月 20日
Application note A Basic Guide to the HART Protocol PDF | HTML 2023年 11月 9日
Application brief Designing Foundation Fieldbus and Profibus PA Devices with the DAC874xh Modem Fa 2019年 3月 4日
Application brief Implementing HART in PLC Analog Input Modules for Real-Time Communication 2018年 11月 5日
Application brief Implementing HART in 2-Wire Field Sensor-Transmitters 2018年 10月 3日
Technical article How to HART-enable your analog input module PDF | HTML 2018年 4月 2日
Technical article Improve your field transmitter designs with HART PDF | HTML 2018年 2月 22日
Technical article Back to the basics: what is HART protocol and how does it work? PDF | HTML 2018年 1月 26日
EVM User's guide DAC8742H Evaluation Module User's Guide (Rev. A) 2017年 11月 14日

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

The DAC8742H evaluation module (EVM) is an easy-to-use platform for evaluating the functionality and performance of the DAC8742H device. The DAC8740H, DAC8741H, and DAC8742H are HART®, FOUNDATION Fieldbus™, and PROFIBUS PA-compliant low-power modems designed for industrial (...)

使用指南: PDF
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模擬型號

DAC874XH IBIS Model

SBAM332.ZIP (86 KB) - IBIS Model
下載
計算工具

ANALOG-ENGINEER-CALC — 類比工程師計算機

The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
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模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
要求
模擬工具

TINA-TI — 基於 SPICE 的類比模擬程式

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
使用指南: PDF
檢視選項
參考設計

TIDA-01504 — 配備 HART® 數據機的高準確度、迴路供電、4mA 至 20mA 現場傳送器參考設計

This reference design provides a solution for a loop-powered, highly-accurate, field (sensor) transmitter with a HART® modem. The design uses a partially-discrete 4-mA to 20-mA current transmitter, HART modem, microcontroller, and power conditioning blocks in realizing a smart field (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-060020 — 啓用 HART 的 PLC 類比輸入模組參考設計

This reference design is a single-channel, 4-mA to 20-mA analog input module that supports the highway addressable remote transducer (HART) communication protocol, enabling bidirectional digital communication between field transmitters and programmable logic controllers (PLCs). The loop current, (...)
Design guide: PDF
電路圖: PDF
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VQFN (RGE) 24 檢視選項
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訂購與品質

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  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 資格摘要
  • 進行中可靠性監測
內含資訊：
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  • 組裝地點

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