AD5700-1ACPZ - HART FSK Modem IC | Analog Devices
MPN: AD5700-1ACPZ ✓ Hoạt độngAD5700-1ACPZ Tóm tắt
A HART modem is a specialized integrated circuit that enables digital communication over analog 4-20 mA current loops, commonly used in industrial process automation. It modulates and demodulates Frequency Shift Keying (FSK) signals at 1200 Hz and 2200 Hz, allowing digital data to be superimposed on the analog signal without interference. The HART protocol is a hybrid analog/digital standard widely adopted in smart transmitters, actuators, and control systems. The AD5700-1ACPZ belongs to the category of communication ICs, specifically modems, and is a key component in industrial communication systems.
Key features include a 0.5% precision oscillator, low power consumption of 115 µA, and compliance with HART physical layer specifications. The device supports both master and slave configurations, making it versatile for various applications. It also includes an internal voltage reference and a carrier detect output, simplifying system design. The operating temperature range is -40°C to +125°C, suitable for harsh industrial environments.
Technically, the AD5700-1 uses a digital signal processing architecture to achieve reliable FSK modulation and demodulation. The integrated oscillator eliminates the need for an external crystal, reducing component count and board space. The device also features a UART interface for easy connection to microcontrollers. The LFCSP package provides excellent thermal performance and a compact footprint, ideal for space-constrained designs.
Typical applications include smart transmitters, process control systems, field instruments, and HART-based communication interfaces. The low power consumption and integrated oscillator make it particularly suitable for loop-powered devices where power is limited. The device is also used in HART master systems, such as handheld communicators and control room equipment.
When designing with the AD5700-1ACPZ, ensure proper decoupling of the power supply and careful layout of the analog front-end to minimize noise. The device requires a few external components, including a coupling capacitor and a protection circuit for the HART signal path. Refer to the datasheet for recommended application circuits and layout guidelines.
Bộ thay thế dễ dàng lắp đặt cho AD5700-1ACPZ — 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 AD5700-1ACPZ (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, Supply Voltage Range, Integrated Oscillator, Internal Oscillator.
AD5700-1BCPZ
✅ Drop-In✗ Hết hàng
$6.6818 / Đơn vị
Xem tài liệu →AD5700-1BCPZ-RL7
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD5700-1BCPZ-R5
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD5700ACPZ-RL7
✅ 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)
HT1200M
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD5700-1ACPZ Thông số kỹ thuật
| Chức năng | HART FSK Half-Duplex Modem |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Maximum Supply Current | 115 µA |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C |
| Hộp | 24-LFCSP-WQ (4x4 mm) |
| Integrated Oscillator | 0.5% precision |
| Modulation | FSK (1200 Hz / 2200 Hz) |
| Giao diện | UART |
| Carrier Detect | Yes |
| Internal Voltage Reference | Yes |
| Trạng thái RoHS | Compliant |
| Kiểu lắp đặt | Surface Mount |
| Số lượng chân | 24 |
| Supply Current (Typical) | 86 µA |
| HART Compliance | HART Physical Layer |
Cấu hình chân AD5700-1ACPZ
| Chân 1 | VDD — Power supply input |
| Chân 2 | GND — Ground |
| Chân 3 | RXD — Receive data input |
| Chân 4 | TXD — Transmit data output |
| Chân 5 | CD — Carrier detect output |
| Chân 6 | RTS — Request to send input |
| Chân 7 | CTS — Clear to send output |
| Chân 8 | CLK — Clock input/output |
| Chân 9 | XIN — Crystal input |
| Chân 10 | XOUT — Crystal output |
| Chân 11 | VREF — Voltage reference output |
| Chân 12 | VBIAS — Bias voltage output |
Ứng dụng tiêu biểu
AD5700-1ACPZ phù hợp cho 6 Áp dụngs: Smart Transmitters, Process Control Systems, Field Instruments, HART Master Systems, Loop-Powered Devices, Industrial Communication Interfaces.
Smart Transmitters
The AD5700-1ACPZ is ideal for smart transmitters used in industrial process control. Its low supply current of 115 µA and integrated 0.5% precision oscillator make it perfect for loop-powered devices where power is limited. The HART FSK modem enables digital communication over the existing 4-20 mA analog loop, allowing configuration and diagnostics without additional wiring. The device's compliance with HART physical layer ensures reliable data transmission in noisy industrial environments. With a wide operating temperature range of -40°C to +125°C, it can withstand harsh conditions. The compact 24-lead LFCSP package fits into space-constrained transmitter designs.
Được đề xuất
Process Control Systems
In process control systems, the AD5700-1ACPZ provides a reliable HART communication interface between field instruments and control room equipment. Its half-duplex FSK modem operates at 1200 Hz and 2200 Hz, enabling digital data transmission over analog loops. The device's low power consumption is crucial for loop-powered field devices, ensuring minimal impact on the loop current. The integrated oscillator reduces external component count, simplifying design and improving reliability. The device supports both master and slave configurations, making it versatile for various system architectures. Its robust performance over -40°C to +125°C ensures operation in demanding industrial environments.
Được đề xuất
Field Instruments
The AD5700-1ACPZ is well-suited for field instruments such as pressure, temperature, and flow transmitters. Its ultra-low supply current of 115 µA allows it to be powered directly from the 4-20 mA loop, eliminating the need for separate power supplies. The integrated 0.5% precision oscillator ensures accurate FSK modulation without external components, reducing board space and cost. The device's HART compliance guarantees interoperability with existing HART networks. The compact LFCSP package is ideal for miniaturized instrument designs. With a wide temperature range, it can be deployed in outdoor and harsh environments. The UART interface simplifies connection to microcontrollers.
Được đề xuất
HART Master Systems
The AD5700-1ACPZ can be used in HART master systems such as handheld communicators and control room equipment. Its low power consumption and integrated oscillator make it suitable for battery-powered handheld devices. The device supports both master and slave modes, allowing it to initiate communication with field devices. The carrier detect output helps in monitoring the HART signal presence. The UART interface enables easy integration with microcontrollers. The device's compliance with HART physical layer ensures reliable communication with a wide range of HART-enabled instruments. The compact package is ideal for portable designs.
Được đề xuất
Loop-Powered Devices
The AD5700-1ACPZ is specifically designed for loop-powered devices where power is limited to the 4-20 mA loop. Its maximum supply current of 115 µA ensures minimal impact on the loop current, allowing more power for other components. The integrated 0.5% precision oscillator eliminates the need for an external crystal, reducing power consumption and component count. The device's low power operation is critical for maintaining loop integrity. The HART modem enables digital communication without affecting the analog signal. The wide operating temperature range makes it suitable for various industrial applications. The compact package fits into small form-factor devices.
Được đề xuất
Industrial Communication Interfaces
The AD5700-1ACPZ serves as a key component in industrial communication interfaces, enabling HART protocol over 4-20 mA loops. Its integrated functions reduce external component count, simplifying design and improving reliability. The device's low power consumption is beneficial for multi-channel systems where power dissipation is a concern. The UART interface allows seamless connection to microcontrollers and PLCs. The device's compliance with HART physical layer ensures interoperability with existing infrastructure. The compact LFCSP package is suitable for modular interface cards. The wide temperature range supports operation in industrial cabinets and field enclosures.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD5700-1ACPZ — 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 | AD5700-1BCPZ-RL7 | AD5700-1BCPZ-R5 | AD5700ACPZ-RL7 | HT5700 | HT1200M |
|---|---|---|---|---|---|---|---|
| Package | 24-LFCSP-WQ (4x4 mm) | 24-LFCSP-WQ (4x4 mm) | 24-LFCSP-WQ (4x4 mm) | 24-LFCSP-WQ (4x4 mm) | 24-LFCSP-WQ (4x4 mm) | 24-LFCSP-WQ (4x4 mm) | 24-LFCSP-WQ (4x4 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Microcybers | Microcybers |
| Integrated Oscillator | Yes (0.5%) | Yes (0.5%) | Yes (0.5%) | Yes (0.5%) | No | Yes | Yes |
| HART Compliance | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Integrated 0.5% precision oscillator (vsAD5700ACPZ-RL7)
- Low power consumption (vsHT5700)
- Proven HART compliance (vsHT1200M)
Ghi chú thiết kế
The AD5700-1ACPZ operates from 2.7V to 5.5V. Use a low-dropout regulator to provide a clean supply voltage, and place a 0.1 µF ceramic capacitor close to the VDD pin. For loop-powered applications, ensure the supply current does not exceed the loop budget; the device's 115 µA maximum is well within typical 4-20 mA loop budgets.
For optimal performance, keep the analog front-end traces short and shielded. Place the coupling capacitor and protection components close to the HART signal pins. Use a ground plane to minimize noise. The LFCSP package has an exposed pad; solder it to the PCB ground for thermal and electrical performance.
Ensure the UART interface is correctly configured for the HART baud rate (1200 bps). Do not exceed the absolute maximum ratings on any pin. For the AD5700-1 variant, the integrated oscillator eliminates the need for an external crystal, but if using the AD5700, a crystal must be provided. Verify the HART signal levels with an oscilloscope during prototyping.
Thông tin tuân thủ
RoHS compliance confirmed from datasheet and distributor listings. Other compliance data not explicitly stated in the provided data.
