DAC8741HRGET - HART Modem with SPI | Texas Instruments
部品番号: DAC8741HRGET ✓ 生産中DAC8741HRGET 概要
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.
ドロップイン代替品: DAC8741HRGET — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: DAC8741HRGET （同一形状・フットプリント） — 相違点: Operating Mode, Product Type.
DAC8740HRGET
✅ ドロップイン ⚠️ 仕様未検証価格はお問い合わせください
データシートを見る →DAC8742HRGET
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
DAC8743HRGET
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
DAC8741HRGET 最大定格＆電気的特性
| Product Type | HART, FOUNDATION Fieldbus, and PROFIBUS PA-compatible modem IC |
| Host Interface | SPI |
| Operating Mode | Half-duplex HART master or slave configuration |
| 動作温度 | -55°C to +125°C |
| パッケージ | 24-pin VQFN (RGE), 4 mm x 4 mm |
| ピン数 | 24 pins |
| 実装タイプ | 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 ピン配置ガイド
DAC8741HRGET (24-pin vqfn (rge), 4 mm x 4 mm パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: DAC8741HRGET.
詳細は データシート をご参照ください。
主な用途
DAC8741HRGET の用途: 6 件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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: DAC8741HRGET — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- Documented multi-protocol modem positioning （vs DAC8740HRGET)
- Wide industrial ordering temperature specification （vs DAC8742HRGET)
- Compact 24-pin VQFN implementation （vs DAC8743HRGET)
設計ノート
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.
コンプライアンス情報
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.
