DAC8740HRGET - 2.7V-5.5V HART/Fieldbus Modem | TI
MPN: DAC8740HRGET ✓ AktifDAC8740HRGET Genel Bakış
A HART modem is the physical-layer interface used to superimpose digital communication signals on 4–20 mA analog instrumentation circuits. A FOUNDATION Fieldbus or PROFIBUS PA interface similarly combines process communication with power delivery over an industrial fieldbus. These interfaces allow sensors, transmitters, controllers, and other field devices to exchange data over the same wiring infrastructure used for measurement and actuation.
The DAC8740HRGET provides a compact 2.7 V to 5.5 V operating supply range for integration into modern industrial electronics. Its half-duplex operating arrangement supports both master and slave configurations, while its integrated modem functionality is intended to reduce board area and external circuitry. The VQFN-24 4 mm × 4 mm package also supports compact transmitter and receiver designs where PCB space is constrained.
The DAC8740H family was created for industrial process-control and industrial-automation applications requiring interoperable fieldbus connectivity. In HART mode, the integrated circuitry is intended to perform the required half-duplex physical-layer functions with minimal external components. This makes the device applicable to transmitter boards, sensor interfaces, communication controllers, data-acquisition equipment, and connected process-control modules.
Typical uses include 4–20 mA HART transmitters, FOUNDATION Fieldbus host and field equipment, PROFIBUS PA measurement devices, industrial sensor gateways, process-monitoring instruments, and factory automation controllers. Designers should verify the exact electrical limits, communication timing, external component requirements, and thermal limits against the manufacturer datasheet before finalizing a production design.
A critical design consideration is selecting the correct fieldbus termination, coupling, protection, and decoupling network. The 2.7 V to 5.5 V supply range must remain valid under transient conditions, and exposed industrial connections may require surge and ESD protection beyond the modem's core communications function. Layout should keep sensitive analog and modem nodes away from high-current switching paths.
This product page combines verified distributor pricing, package information, family capabilities, source links, and drop-in replacement analysis with practical industrial-interface design guidance. It distinguishes verified alternatives from broader functional equivalents so engineers can assess PCB replacement risk before committing to a redesign.
Drop-in alternatifler için DAC8740HRGET — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu Serideki Variantlar
Yedek parça uyumlu olan aynı serideki modeller DAC8740HRGET (aynı form faktörü ve ayağa oturma) — farklı olan HART Configuration, Host Interface, Operating Mode, Package, Product Type.
DAC8740HRGER
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Veri Şablonunu Görüntüle →DAC8740HRGET Maksimum Değerlendirmeler & Elektriksel Özellikler
| Product Type | HART, FOUNDATION Fieldbus, and PROFIBUS PA modem |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Operating Mode | Half-duplex HART mode |
| HART Configuration | Master or slave configuration |
| Fieldbus Compatibility | HART, FOUNDATION Fieldbus, and PROFIBUS PA |
| Power Class | Low-power industrial modem |
| Package Type | 24-pin VQFN |
| Package Dimensions | 4 mm × 4 mm |
| Montaj Türü | Surface mount |
| External Component Requirement | Minimal external components in HART mode |
| Application Category | Industrial process control and industrial automation |
DAC8740HRGET 4 mm × 4 mm Pin Yapısı Kılavuzu
DAC8740HRGET (4 mm × 4 mm paket) için pin yapısı. Bu analog bileşen, giriş, çıkış ve güç besleme pinleri içerir. Ofset null, telafi ve etkinleştirme pin yapılandırmaları için üretici veri kitapçığını referans alın. Sinyal işleme ve güç amplifikasyon devreleri için mükemmel bir bileşendir.
Ayrıntılı pin çıkış verisi mevcut değil: DAC8740HRGET.
Aşağıdaki veri sayfası tam pin konfigürasyonu için.
Tipik Uygulamalar
DAC8740HRGET için uygundur 6 uygulamas: 4–20 mA HART Sensor Transmitter, FOUNDATION Fieldbus Instrument Interface, PROFIBUS PA Measurement Device, Industrial Process-Monitoring Gateway, Factory-Automation Sensor Interface, Connected Transmitter and Controller Module.
4–20 mA HART Sensor Transmitter
The DAC8740HRGET fits a compact 4–20 mA HART transmitter because it integrates the required half-duplex modem physical layer and supports both master and slave configurations. Its 2.7 V to 5.5 V supply range can serve low-voltage industrial signal-conditioning equipment without requiring a high-voltage modem supply directly at the IC. The implementation still needs the correct analog measurement chain, current regulator, coupling and filtering network, field-bus protection, and reference circuitry. Following the manufacturer application circuit is important because the modem communicates by superimposing a signal on the measurement current.
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FOUNDATION Fieldbus Instrument Interface
The DAC8740HRGET is applicable to FOUNDATION Fieldbus instrument interfaces because the DAC874xH family combines HART, FOUNDATION Fieldbus, and PROFIBUS PA support in one low-power modem IC. A field-mounted pressure, temperature, flow, or level instrument can use the integrated half-duplex physical layer to communicate over industrial fieldbus wiring while retaining a compact 24-pin VQFN footprint. Designers must confirm the exact fieldbus electrical layer, transformer or coupling requirements, termination behavior, surge protection, and supply isolation outside the modem itself.
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PROFIBUS PA Measurement Device
The DAC8740HRGET can support a PROFIBUS PA measurement device when the system requires a compact single-chip modem with a 2.7 V to 5.5 V operating range. Its low-power design and integrated half-duplex physical-layer circuitry suit industrial measurement equipment that must communicate process data over fieldbus wiring. The modem does not replace the complete PROFIBUS PA interface network, so designers still need to implement the specified line coupling, protection, grounding, and power-distribution arrangements and verify EMC performance in the finished instrument.
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Industrial Process-Monitoring Gateway
The DAC8740HRGET is useful in an industrial process-monitoring gateway that must interface with HART, FOUNDATION Fieldbus, or PROFIBUS PA equipment while minimizing PCB area. Its 4 mm × 4 mm VQFN-24 package leaves more board space for isolation, protection, data processing, and communications circuitry. Because the supported protocols may require different external networks and operating modes, the gateway design should use the protocol-specific reference implementation. The 2.7 V to 5.5 V supply range also requires careful local regulation to remain within limits during industrial transients.
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Factory-Automation Sensor Interface
The DAC8740HRGET fits factory-automation sensor interfaces that need bidirectional digital communication over an analog or fieldbus connection. Its half-duplex operation can support both master and slave HART configurations, allowing the same modem family to serve controllers and field devices when the surrounding circuit is configured correctly. The low-power 2.7 V to 5.5 V supply range and compact VQFN-24 package help reduce board-space requirements. Production designs must add suitable surge and ESD protection for factory wiring and verify operation across the intended temperature range.
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Connected Transmitter and Controller Module
The DAC8740HRGET is suitable for connected transmitter and controller modules that combine local measurement or actuation with HART, FOUNDATION Fieldbus, or PROFIBUS PA communication. The integrated modem reduces the need for a separate physical-layer implementation, while half-duplex master or slave support broadens its use in connected industrial equipment. Designers should allocate PCB area for external filtering, coupling, protection, and isolation components identified by the manufacturer reference design. The compact 24-pin VQFN package also simplifies fanout and allows smaller field-device enclosures without assuming that the modem eliminates external protection.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: DAC8740HRGET — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | DAC8740HRGER |
|---|---|---|
| Package | VQFN-24 (4 mm × 4 mm) | VQFN-24 (4 mm × 4 mm) - same |
| Brand | Texas Instruments | Texas Instruments |
Ana Farklılayıcılar
- Multi-protocol fieldbus integration (karşılaştırma:DAC8740HRGER)
- Configurable HART operating role (karşılaştırma:DAC8740HRGER)
- Compact low-voltage integration (karşılaştırma:DAC8740HRGER)
Tasarım Notları
Use the manufacturer reference layout as the starting point for the DAC8740HRGET. Keep the 24-pin VQFN footprint, exposed-pad connection, component placement, and trace geometry consistent with the official package data. Route sensitive modem and analog nodes away from switching power nodes and high-current fieldbus paths. Verify the thermal-via arrangement against the package drawing because the supplied data does not provide a complete exposed-pad land pattern or maximum junction temperature.
Design the local supply network so the DAC8740HRGET always remains within its verified 2.7 V to 5.5 V operating range. Place the manufacturer-specified bypass capacitors close to the relevant supply pins and account for voltage drop, startup behavior, and load transients. Industrial wiring can introduce large disturbances, so determine whether the product design needs additional filtering, surge suppression, isolation, or a wider supply arrangement outside the modem IC.
Do not treat a matching VQFN outline as proof that any substitute is automatically interchangeable. Before using DAC8740HRGER in place of DAC8740HRGET, compare the complete ordering table, pin names, electrical limits, temperature range, exposed-pad requirements, and protocol support. The supplied evidence establishes the same package dimensions but does not include every alternative datasheet value. Prototype and validate communications, EMC behavior, and supply tolerance before production substitution.
Uyumluluk Bilgisi
The supplied verified snippets do not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive-qualification status for DAC8740HRGET. AEC-Q100 is not applicable because no automotive qualification was identified.
