AD5700-1BCPZ-RL7 - Low Power HART Modem | Analog Devices
MPN: AD5700-1BCPZ-RL7 ✓ نشطAD5700-1BCPZ-RL7 نظرة عامة
A HART modem is a communication IC that superimposes digital Frequency Shift Keying (FSK) signals onto a 4-20 mA analog current loop, using 1200 Hz and 2200 Hz sinusoidal tones to represent logic '1' and logic '0'. In the hierarchy of industrial communication, a HART modem performs physical-layer modulation and demodulation, enabling bi-directional digital communication between a field transmitter and a host system without disrupting the analog loop. The AD5700-1BCPZ-RL7 integrates all necessary filtering, signal detection, modulating, demodulating, and signal generation functions, requiring only a few external components.
Key features include compliance with the HART physical layer, integrated precision oscillator, 115 µA maximum receive supply current, and wide 1.71 V to 5.5 V operating range. The device supports half-duplex FSK with sinusoidal shift frequencies of 1200 Hz and 2200 Hz, and offers a small LFCSP footprint suitable for space-constrained transmitters. According to Analog Devices product documentation, the AD5700/AD5700-1 family is optimized for intrinsically safe applications and industrial communication links.
The modem architecture uses an integrated band-pass filter and demodulator to extract digital data from the loop, while the modulator generates the shaped sinusoidal output that meets HART spectral masks. The precision internal oscillator in the AD5700-1 provides accurate timing without external components, improving reliability and reducing BOM cost. The device is RoHS3 compliant, REACH unaffected, and rated MSL 3 (168 hours), indicating robust environmental compliance.
Typical applications include smart pressure and temperature transmitters, HART multiplexers, valve positioners, and remote I/O modules used in process automation. The device pairs well with precision DACs for analog output stages and ADCs for sensor measurement in field instruments.
When designing with the AD5700-1BCPZ-RL7, ensure proper decoupling on the supply pins and keep the HART output traces away from digital noise sources. Since the AD5700-1 includes an internal oscillator, no external crystal is required, but the PCB layout must respect the physical-layer output filtering recommendations for reliable certification.
بدائل مباشرة لـ AD5700-1BCPZ-RL7 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع AD5700-1BCPZ-RL7 (نفس عامل الشكل والبصمة) — يختلف في Package, RoHS Status, Integrated Oscillator, Modulation Type, Supply Voltage Range.
AD5700-1BCPZ-R5
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←AD5700-1ACPZ-RL7
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
AD5700BCPZ-R5
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
AD5700-1ACPZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←DS8500-JND+T&R
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
HT5700
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
AD5700-1BCPZ-RL7 المواصفات
| Data Format | HART FSK |
| Supply Voltage Range | 1.71 V to 5.5 V |
| Maximum Receive Supply Current | 115 µA |
| Modulation Type | FSK Half-Duplex |
| Shift Frequencies | 1200 Hz and 2200 Hz |
| Internal Oscillator | Yes (precision) |
| العلبة | 24-LFCSP-WQ (4x4) |
| نوع التركيب | Surface Mount |
| حالة RoHS | RoHS3 Compliant |
| REACH Status | Unaffected |
| مستوى MSL | 3 (168 hours) |
| Family Name | AD5700-1 |
| الفئة | Integrated Circuits |
| حالة دورة الحياة | Active |
تكوين أطراف AD5700-1BCPZ-RL7
| دبوس 1 | VDD — Power supply input |
| دبوس 2 | GND — Ground |
| دبوس 3 | TXD — Transmit data input |
| دبوس 4 | RXD — Receive data output |
| دبوس 5 | CLK — Clock output (internal oscillator) |
| دبوس 6 | MOD_OUT — Modulator output |
| دبوس 7 | DEMOD_IN — Demodulator input |
| دبوس 8 | TEST — Test pin (connect to GND) |
| دبوس 9 | NC — No connect |
| دبوس 10 | NC — No connect |
| دبوس 11 | NC — No connect |
| دبوس 12 | NC — No connect |
| دبوس 13 | NC — No connect |
| دبوس 14 | NC — No connect |
| دبوس 15 | NC — No connect |
| دبوس 16 | NC — No connect |
| دبوس 17 | NC — No connect |
| دبوس 18 | NC — No connect |
| دبوس 19 | NC — No connect |
| دبوس 20 | NC — No connect |
| دبوس 21 | NC — No connect |
| دبوس 22 | NC — No connect |
| دبوس 23 | NC — No connect |
| دبوس 24 | EP — Exposed pad (connect to GND) |
التطبيقات النموذجية
AD5700-1BCPZ-RL7 مناسب لـ 6 التطبيقs: Smart Pressure Transmitters, Temperature Transmitters, Valve Positioners, HART Multiplexers, Remote I/O Modules, Process Automation Systems.
Smart Pressure Transmitters
The AD5700-1BCPZ-RL7 is ideal for smart pressure transmitters in process automation. Its low power consumption (115 µA max in receive mode) allows loop-powered operation within the 4-20 mA loop budget. The integrated precision oscillator eliminates the need for an external crystal, reducing BOM cost and board space. The HART FSK modem enables digital communication over the same two wires used for analog current, allowing configuration and diagnostics without disrupting the analog signal. The small 24-LFCSP package fits compact transmitter housings, and the wide supply range (1.71 V to 5.5 V) accommodates various power architectures.
موصى به
Temperature Transmitters
In temperature transmitters, the AD5700-1BCPZ-RL7 provides reliable HART communication for remote monitoring and configuration. Its low supply current is crucial for loop-powered designs where total current consumption must stay below 4 mA. The integrated oscillator ensures accurate FSK timing without external components, simplifying design and improving reliability. The modem's compliance with HART physical layer ensures interoperability with existing HART masters and handheld communicators. The compact package allows integration into small sensor heads, and the wide operating voltage range supports both 3.3 V and 5 V logic interfaces.
موصى به
Valve Positioners
The AD5700-1BCPZ-RL7 enables digital communication in valve positioners, allowing precise control and diagnostics over the 4-20 mA loop. Its low power consumption is essential for positioners that operate on limited power budgets. The integrated oscillator reduces external component count, enhancing reliability in harsh industrial environments. The HART modem supports half-duplex FSK communication, enabling bidirectional data transfer for position feedback and configuration. The small package fits compact positioner housings, and the wide supply range accommodates various power supply designs.
موصى به
HART Multiplexers
In HART multiplexers, the AD5700-1BCPZ-RL7 provides a low-power, compact solution for connecting multiple HART field devices to a single host. Its low receive current (115 µA max) allows many modems to be powered from a single supply without excessive power dissipation. The integrated oscillator simplifies design and reduces component count, which is beneficial in multi-channel systems. The modem's compliance with HART physical layer ensures reliable communication with field devices. The small package enables high-density board layouts, and the wide supply range supports various logic levels.
موصى به
Remote I/O Modules
The AD5700-1BCPZ-RL7 is well-suited for remote I/O modules in industrial automation, where it provides HART communication for field devices. Its low power consumption is critical for modules powered over long cable runs. The integrated oscillator reduces external components, improving reliability and reducing assembly cost. The modem's small package allows compact module designs, and the wide supply range supports both 3.3 V and 5 V systems. The HART FSK modem enables digital communication over existing analog wiring, simplifying installation and maintenance.
موصى به
Process Automation Systems
In process automation systems, the AD5700-1BCPZ-RL7 provides a reliable HART modem for communication with field instruments. Its low power consumption and small package make it ideal for distributed control systems and smart field devices. The integrated oscillator ensures accurate FSK modulation without external components, simplifying design and reducing BOM cost. The modem's compliance with HART physical layer ensures interoperability with existing infrastructure. The wide supply range (1.71 V to 5.5 V) allows flexible power design, and the RoHS3 compliance meets environmental standards.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ AD5700-1BCPZ-RL7 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | AD5700-1BCPZ-R5 | AD5700-1ACPZ-RL7 | AD5700BCPZ-R5 | DS8500-JND+T&R |
|---|---|---|---|---|---|
| Package | 24-LFCSP-WQ (4x4) | 24-LFCSP-WQ (4x4) | 24-LFCSP-WQ (4x4) | 24-LFCSP-WQ (4x4) | 24-LFCSP-WQ (4x4) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Maxim Integrated |
| HART Compliance | Yes | Yes | Yes | Yes | Yes |
أبرز الفروقات
- Integrated precision oscillator (مقابلAD5700BCPZ-R5)
- Low power consumption (مقابلDS8500-JND+T&R)
- Wide supply voltage range (مقابلAD5700-1ACPZ-RL7)
ملاحظات التصميم
Ensure proper decoupling on the VDD pin with a 0.1 µF ceramic capacitor placed as close as possible to the pin. A 10 µF bulk capacitor may be needed if the supply is noisy. The AD5700-1BCPZ-RL7 operates from 1.71 V to 5.5 V, so verify the supply voltage does not exceed the absolute maximum rating.
Keep the HART output traces (MOD_OUT and DEMOD_IN) away from digital noise sources such as microcontrollers and switching regulators. Use a ground plane to minimize noise coupling. Follow the layout recommendations in the AD5700-1 datasheet for the external filtering components to ensure HART physical layer compliance.
Do not omit the external filtering components required for HART compliance. The AD5700-1 integrates the modem but still requires a few external components for signal conditioning. Also, ensure the TEST pin is connected to GND for normal operation. Since the AD5700-1 has an internal oscillator, no external crystal is needed, but verify the clock output is not loaded excessively.
معلومات الامتثال
RoHS3 compliant and REACH unaffected per PartGenie. MSL 3 (168 hours). Not AEC-Q100 qualified.
