AD5700-1BCPZ-RL - HART Modem IC with Oscillator | Analog Devices
MPN: AD5700-1BCPZ-RL ✓ Hoạt độngAD5700-1BCPZ-RL Tóm tắt
A HART modem is a specialized integrated circuit that enables communication over legacy 4-20 mA analog loops by superimposing a frequency-shift keying (FSK) digital signal. The AD5700-1 is part of the HART modem product family, which falls under the broader category of industrial communication ICs. These devices are essential in process automation, allowing digital configuration and diagnostics without disrupting analog measurement signals.
Key features include a low-power design with a typical supply current of 86 µA in listen-only mode, an integrated receive band-pass filter that can be bypassed, and an internally buffered HART output for high drive capability. The device also includes an internal reference, a RESET pin for power-down mode, and a REF_EN pin to control the internal reference. The integrated oscillator provides a precise 1.2 MHz clock, simplifying the design and reducing component count.
The AD5700-1 uses a digital signal processing (DSP) architecture to implement the HART protocol, ensuring reliable communication over long cable runs. The device supports data rates of 1200 bps, the standard HART speed, and is fully compliant with the HART physical layer specification. The LFCSP package offers excellent thermal performance and a small footprint, making it ideal for loop-powered transmitters and other compact field instruments.
Typical applications include industrial process control, smart transmitters, valve positioners, and other field instruments that require HART communication. The device interfaces easily with Analog Devices' industrial converters, such as the AD5421 loop-powered current-output DAC, enabling complete smart transmitter solutions.
When designing with the AD5700-1, ensure proper decoupling on the supply pins and follow the recommended layout in the datasheet to minimize noise. The RESET pin can be used to place the device in power-down mode, reducing current consumption to 1 µA, which is critical for loop-powered applications.
Bộ thay thế dễ dàng lắp đặt cho AD5700-1BCPZ-RL — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với AD5700-1BCPZ-RL (cùng hình factor và footprint) — khác nhau ở Modulation Type, RoHS Status, Package, Supply Voltage Range, Data Rate.
AD5700-1BCPZ-RL7
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD5700-1BCPZ-R5
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD5700-1ACPZ-RL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD5700BCPZ-R5
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
HT5700
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD5700-1BCPZ-RL Thông số kỹ thuật
| Supply Voltage Range | 2.7 V to 5.5 V |
| Supply Current (Listen Mode) | 86 µA typical |
| Power-Down Current | 1 µA typical |
| Tốc độ dữ liệu | 1200 bps |
| Modulation Type | FSK (Frequency Shift Keying) |
| Integrated Oscillator | Yes, 1.2 MHz |
| Receive Band-Pass Filter | Integrated, bypassable |
| Internal Reference | Yes |
| HART Output Drive | Internally buffered, high drive |
| Hộp | 24-Lead LFCSP-WQ (4x4 mm) |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 3 (168 Hours) |
| Kiểu lắp đặt | Surface Mount |
| HART Compliance | HART Physical Layer Compliant |
Cấu hình chân AD5700-1BCPZ-RL
| Chân 1 | VCC — Power supply input, 2.7V to 5.5V |
| Chân 2 | GND — Ground |
| Chân 3 | RESET — Active-low reset, also used for power-down mode |
| Chân 4 | REF_EN — Internal reference enable |
| Chân 5 | HART_OUT — HART FSK output, internally buffered |
| Chân 6 | HART_IN — HART FSK input |
| Chân 7 | CD — Carrier detect output |
| Chân 8 | RXD — Receive data output |
| Chân 9 | TXD — Transmit data input |
| Chân 10 | CLK — Clock output (1.2 MHz) |
| Chân 11 | XTAL — Crystal connection (not used with integrated oscillator) |
| Chân 12 | NC — No connect |
Ứng dụng tiêu biểu
AD5700-1BCPZ-RL phù hợp cho 6 Áp dụngs: Industrial Process Control, Smart Transmitters, Valve Positioners, Field Instruments, Process Automation, Remote Monitoring.
Industrial Process Control
The AD5700-1BCPZ-RL is ideal for industrial process control systems that require HART communication over 4-20 mA loops. Its low power consumption (86 µA in listen mode) and wide supply voltage range (2.7V to 5.5V) make it suitable for loop-powered transmitters. The integrated oscillator reduces component count, simplifying design in space-constrained field instruments. With a data rate of 1200 bps, it provides reliable digital communication for configuration and diagnostics without disrupting analog measurement signals.
Được đề xuất
Smart Transmitters
The AD5700-1BCPZ-RL is specifically designed for smart transmitters that need HART communication. Its integrated receive band-pass filter and internally buffered HART output provide high drive capability, ensuring signal integrity over long cable runs. The device's low power-down current (1 µA) is critical for loop-powered transmitters where power budget is tight. The compact 24-lead LFCSP package fits easily into small transmitter housings, and the integrated oscillator eliminates the need for an external crystal, reducing BOM cost and board space.
Được đề xuất
Valve Positioners
The AD5700-1BCPZ-RL is well-suited for valve positioners that require HART communication for remote calibration and diagnostics. Its low supply current of 86 µA in listen mode allows it to be powered from the 4-20 mA loop without affecting the analog signal. The integrated oscillator ensures accurate timing for FSK modulation, and the device's compliance with the HART physical layer guarantees interoperability with existing HART masters. The small LFCSP package is ideal for the compact form factor of modern valve positioners.
Được đề xuất
Field Instruments
The AD5700-1BCPZ-RL is a key component in field instruments such as pressure, temperature, and flow transmitters. Its integrated functions reduce external component count, enhancing reliability in harsh industrial environments. The device operates from 2.7V to 5.5V, accommodating various power supply designs. The power-down mode with 1 µA current is beneficial for battery-powered instruments. The HART modem enables digital communication for remote monitoring and configuration, improving overall system efficiency.
Được đề xuất
Process Automation
In process automation, the AD5700-1BCPZ-RL enables HART communication in distributed control systems. Its low power consumption and small footprint make it ideal for integration into existing 4-20 mA loops. The device's integrated receive filter and buffered output ensure robust communication in noisy industrial environments. The 1200 bps data rate is sufficient for transmitting process variables and diagnostic information. The AD5700-1 is designed to interface easily with Analog Devices' industrial converters, enabling complete smart transmitter solutions.
Được đề xuất
Remote Monitoring
The AD5700-1BCPZ-RL is suitable for remote monitoring applications where HART communication is used to transmit data from field devices to a central control room. Its low power consumption allows operation from battery or loop power, making it ideal for remote locations. The integrated oscillator and minimal external components simplify design and improve reliability. The device's compliance with HART physical layer ensures compatibility with existing infrastructure. The compact package is advantageous for retrofitting into existing installations.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD5700-1BCPZ-RL — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | AD5700-1BCPZ-RL7 | AD5700-1BCPZ-R5 | AD5700-1ACPZ-RL7 | AD5700BCPZ-R5 |
|---|---|---|---|---|---|
| Package | 24-Lead LFCSP-WQ (4x4 mm) | 24-Lead LFCSP-WQ (4x4 mm) | 24-Lead LFCSP-WQ (4x4 mm) | 24-Lead LFCSP-WQ (4x4 mm) | 24-Lead LFCSP-WQ (4x4 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Integrated Oscillator | Yes | Yes | Yes | Yes | No |
| Temperature Grade | Industrial (-40°C to +125°C) | Industrial (-40°C to +125°C) | Industrial (-40°C to +125°C) | Automotive (-40°C to +105°C) | Industrial (-40°C to +125°C) |
| Supply Current (Listen Mode) | 86 µA | 86 µA | 86 µA | 86 µA | 86 µA |
| Power-Down Current | 1 µA | 1 µA | 1 µA | 1 µA | 1 µA |
| Data Rate | 1200 bps | 1200 bps | 1200 bps | 1200 bps | 1200 bps |
| Reel Quantity | 5000 | 1000 | 500 | 1000 | 500 |
Bảo phân biệt quan trọng
- Integrated oscillator eliminates external crystal (vsAD5700BCPZ-R5)
- Industrial temperature range up to +125°C (vsAD5700-1ACPZ-RL7)
- Low power-down current of 1 µA (vsAD5700BCPZ-R5)
Ghi chú thiết kế
The AD5700-1BCPZ-RL operates from 2.7V to 5.5V. For loop-powered applications, ensure the supply voltage remains above the minimum dropout of the loop-powered regulator. Use a 0.1 µF decoupling capacitor close to the VCC pin and a 10 µF bulk capacitor for low-frequency stability. In power-down mode, the RESET pin should be held low to reduce current to 1 µA.
Follow the recommended layout in the AD5700/AD5700-1 datasheet. Keep the HART_IN and HART_OUT traces short and shielded to minimize noise coupling. Place the receive band-pass filter components close to the HART_IN pin. Use a solid ground plane under the LFCSP package to enhance thermal performance and reduce parasitic inductance.
Do not exceed the absolute maximum supply voltage of 6V. Ensure the RESET pin is properly pulled high during normal operation; otherwise, the device may enter power-down mode unexpectedly. If using the internal reference, tie REF_EN to RESET to power down both together. Verify that the HART output is properly terminated to avoid signal reflections.
Thông tin tuân thủ
RoHS3 compliant and REACH unaffected per PartGenie. MSL 3 (168 hours).
