DAC8741HRGET - HART Modem with SPI | Texas Instruments
料号： DAC8741HRGET ✓ 量产中DAC8741HRGET 概述
A HART modem is a physical-layer interface that adds digital communication over an analog instrumentation signal path. As a modem IC, the DAC8741H belongs to the interface-IC hierarchy, connecting embedded controllers with HART-compatible transmitters, sensors, actuators, and fieldbus equipment. The TI product page describes the device as a HART, FOUNDATION Fieldbus, and PROFIBUS PA-compliant modem suitable for both slave and master configurations in HART mode.
The principal feature of the DAC8741HRGET is its SPI host interface. The verified product information states that the interface includes a DO pin for daisy-chain support, together with interrupts and other control features. This allows a host microcontroller or processor to configure the modem and exchange status and command information through a serial interface while the integrated physical-layer circuitry handles the fieldbus signal.
The device is offered in a compact 24-VQFN package measuring 4 mm by 4 mm. Its industrial operating-temperature designation covers -55°C to +125°C, making the qualified ordering variant suitable for harsh industrial environments when the complete system requirements, qualification records, and application conditions are independently reviewed. The ordering suffix identifies the RGE package, and HRGET is supplied in tape-and-reel form.
Typical uses include process transmitters, fieldbus sensor transmitters, industrial controllers, data acquisition equipment, remote I/O systems, and PROFIBUS PA-compatible field devices. In these systems, the DAC8741HRGET can reduce the need for discrete modem circuitry while providing a standardized host-side connection through SPI.
Designers should confirm the exact receiver and transmitter implementation, timing limits, electrical levels, and external-component requirements against the manufacturer datasheet before release. The SPI signals, analog fieldbus connection, supply rails, grounding, and exposed-pad layout must be routed according to the recommended application circuit. Component availability and lifecycle commitments should also be checked for the intended production program.
This page consolidates verified manufacturer and distributor information with transparent data-gap markers, package guidance, comparison rows, and application-focused engineering context. It also distinguishes verified facts from specifications that require confirmation in the latest Texas Instruments datasheet.
直接替换替代料： DAC8741HRGET ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： DAC8741HRGET （相同外形与封装尺寸） ——差异在于 Operating Mode, Product Type.
DAC8740HRGET
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →DAC8742HRGET
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
DAC8743HRGET
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
DAC8741HRGET 最大额定值与电气特性
| Product Type | HART, FOUNDATION Fieldbus, and PROFIBUS PA-compatible modem IC |
| Host Interface | SPI |
| Operating Mode | Half-duplex HART master or slave configuration |
| 工作温度 | -55°C to +125°C |
| 封装 | 24-pin VQFN (RGE), 4 mm x 4 mm |
| 引脚数量 | 24 pins |
| 安装类型 | Surface mount |
| Daisy-Chain Support | DO pin included in the SPI interface |
| Interrupt Support | Supported |
| Application Category | Industrial process control and industrial automation |
DAC8741HRGET 24-pin vqfn (rge), 4 mm x 4 mm 引脚配置指南
DAC8741HRGET（24-pin vqfn (rge), 4 mm x 4 mm 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： DAC8741HRGET.
请参阅 数据手册 以查看完整引脚配置。
典型应用
DAC8741HRGET 适用于 6 应用s: HART Process Transmitter, FOUNDATION Fieldbus Equipment, PROFIBUS PA Field Device, Industrial Remote I/O Module, Data Acquisition Front End, Industrial Gateway and Converter.
HART Process Transmitter
The Texas Instruments DAC8741HRGET fits a digital-output process transmitter that must superimpose HART communication on an analog process signal. Its 24-pin VQFN (RGE) package saves board area, while the SPI interface provides a structured connection to the transmitter's host controller. According to the manufacturer, the integrated modem can operate as a half-duplex HART master or slave with minimal external components. That integration can simplify the physical layer without replacing the complete analog measurement or output chain. Confirm the DAC8741H datasheet for supported HART data rates, receive thresholds, line-driver limits, timing, and the required external network components before freezing the transmitter design.
推荐
FOUNDATION Fieldbus Equipment
The DAC8741HRGET is suitable for FOUNDATION Fieldbus-compatible industrial equipment that connects an embedded controller to a fieldbus physical layer. The manufacturer identifies the DAC874xH family as compatible with HART, FOUNDATION Fieldbus, and PROFIBUS PA applications. Its SPI interface can carry configuration and status information to the host processor, and the -55°C to +125°C ordering specification covers a wide industrial temperature range. The 4 mm by 4 mm, 24-pin VQFN package also allows a compact implementation in transmitters and remote I/O modules. Designers must still implement the exact interface network, isolation strategy, protection, filtering, and grounding required by the target fieldbus standard and equipment safety requirements.
推荐
PROFIBUS PA Field Device
The DAC8741HRGET can support a PROFIBUS PA-compatible field device when its documented protocol features and electrical parameters satisfy the product specification. Texas Instruments explicitly lists PROFIBUS PA among the DAC874xH family applications, and the device provides an SPI host connection that can support deterministic configuration and status exchange. The compact 24-pin VQFN (RGE) package is useful in remote transmitters and compact I/O devices, while the -55°C to +125°C variant supports demanding industrial environments. A complete design must include the required fieldbus coupling, line termination, isolation, surge protection, and power-supply arrangement. Those network details are not provided in the verified snippets and must be taken directly from the current manufacturer documentation.
推荐
Industrial Remote I/O Module
The DAC8741HRGET is a practical choice for a compact remote I/O module that must add a standards-compatible fieldbus connection to sensors or actuators. Its SPI interface lets a host controller initialize the modem and respond to interrupts, while the integrated HART physical layer reduces the amount of discrete communications circuitry. The 24-pin VQFN (RGE) package helps minimize PCB footprint in densely populated remote modules. For deployment across -55°C to +125°C environments, designers should account for exposed-pad heat spreading, supply noise, protection networks, and enclosure-related temperature rises. Verify all pin assignments and layout guidance in the official 24-pin package drawing before layout release.
推荐
Data Acquisition Front End
The DAC8741HRGET can add a HART communication channel to a data-acquisition front end that combines sensing, conversion, and remote diagnostics. The SPI host interface provides a convenient partition between the host processor and the communications modem, while half-duplex master or slave operation supports integration with different network topologies. Its 24-pin VQFN (RGE) package allows placement close to the analog and communications sections of the board. Because measurement accuracy can be affected by noise and ground-current coupling, the implementation should use the datasheet's recommended power and layout arrangement, keep modem return currents controlled, and validate the complete channel under simultaneous measurement and communication activity.
推荐
Industrial Gateway and Converter
The DAC8741HRGET is relevant to industrial gateways that translate or supervise fieldbus-connected equipment. A gateway can use the device's SPI interface for configuration and status monitoring while the integrated modem handles the HART physical layer. This can reduce interface complexity compared with a discrete transmitter implementation and provide a compact 24-pin VQFN option for space-constrained electronics. The wide -55°C to +125°C ordering specification supports harsh installations when the enclosure and thermal design preserve that operating range. Before using the modem in a gateway, verify supported baud rates, packet timing, interrupt behavior, line-coupling requirements, and isolation arrangements against the current Texas Instruments datasheet rather than inferring them from the family description.
推荐
推荐产品汇总
工程参考数据： DAC8741HRGET ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | DAC8740HRGET | DAC8742HRGET | DAC8743HRGET |
|---|---|---|---|---|
| Package | VQFN-24 (RGE), 4 mm x 4 mm | VQFN-24 (RGE), 4 mm x 4 mm | VQFN-24 (RGE), 4 mm x 4 mm | VQFN-24 (RGE), 4 mm x 4 mm |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Type | HART, FOUNDATION Fieldbus, and PROFIBUS PA-compatible modem IC | DAC874xH-family modem IC | DAC874xH-family modem IC | DAC874xH-family modem IC |
| Pin Count | 24 pins | 24 pins | 24 pins | 24 pins |
关键差异点
- Documented multi-protocol modem positioning （对比 DAC8740HRGET)
- Wide industrial ordering temperature specification （对比 DAC8742HRGET)
- Compact 24-pin VQFN implementation （对比 DAC8743HRGET)
设计说明
Use the current Texas Instruments RGE package drawing as the controlling layout document. Place the modem's input, output, supply, and ground connections according to the datasheet's recommended application circuit, and provide a continuous ground reference beneath the package where the footprint permits. Do not infer individual signal names from the 24-pin count because the supplied snippets do not contain the official pin table.
Separate the modem's supply path from noisy analog and switching loads as far as the practical layout permits. Place local decoupling at the device's supply pins using the capacitance, voltage rating, and dielectric requirements published in the datasheet. Because the verified material identifies this as a low-power industrial modem but does not provide current or supply-voltage values, those limits must be confirmed before sizing the regulator and thermal budget.
The fieldbus connection is sensitive to external-component values, termination, protection, and grounding. Implement only the network shown for the intended HART, FOUNDATION Fieldbus, or PROFIBUS PA topology, and validate signal levels and timing with the actual cable and termination. Keep SPI routing away from the analog modem path where possible, and confirm that daisy-chain DO behavior remains compatible with the number of devices on the bus.
The 4 mm by 4 mm VQFN package can transfer heat through its exposed pad, but the verified data does not provide thermal resistance or maximum dissipation. Follow the manufacturer's exposed-pad assembly and copper-area guidance, and use the -55°C to +125°C ordering specification as an environmental target rather than proof that the assembled product meets that range without enclosure and thermal validation.
Do not treat the HART, FOUNDATION Fieldbus, and PROFIBUS PA-compatible description as proof that one board configuration supports every protocol simultaneously. Confirm the required mode, timing, baud rate, electrical layer, and isolation requirements for each product variant. Likewise, distributor inventory and an $5.1963 reference price do not guarantee production allocation; confirm lot status and delivery commitment against the approved BOM.
合规信息
The supplied search results do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. The device is an industrial interface IC rather than an automotive-qualified AEC-Q100 option in the provided evidence. Confirm material and environmental declarations with Texas Instruments for the exact ordering code.
