AD5700-1ACPZ-RL7

Overview

The AD5700-1ACPZ-RL7 is a low-power HART FSK half-duplex modem manufactured by Analog Devices. It integrates modulation, demodulation, filtering, and signal generation functions to comply with the HART physical layer requirements. The device features a precision internal oscillator, eliminating the need for an external crystal. It operates on a supply voltage range of 1.71 V to 5.5 V with a maximum receive mode current consumption of 115 µA. The component utilizes a UART interface and is housed in a 4 mm × 4 mm LFCSP package.

Feature Summary

• Integrates all necessary filtering, signal detection, modulating, demodulating, and signal generation functions for HART communication.
• Includes a precision internal oscillator that reduces board space requirements and simplifies design.
• Features a buffered HART output providing extra drive capability without requiring external buffering components.

Applications

• Field transmitters
• HART multiplexers
• PLC and DCS analog I/O modules
• HART network connectivity

Procurement Notes

Verify the specific suffix RL7 corresponds to the reel packaging configuration required for your assembly line. Confirm that the A grade meets the operational temperature specifications for your intended industrial environment. Ensure the ordering documentation matches the exact part number to avoid discrepancies in the integrated internal oscillator feature.

Selection Notes

Select this model when minimizing external component count is critical due to the inclusion of the internal RC oscillator. It is suitable for applications requiring intrinsically safe operation or loop-powered configurations where low power consumption is essential. Verify compatibility with the system's UART interface levels and ensure the 4 mm × 4 mm package fits the PCB layout constraints.

Part Context

This component belongs to the AD5700/AD5700-1 series of low-power HART modems. The AD5700-1 variant specifically distinguishes itself by incorporating a precision internal oscillator, whereas the standard AD5700 requires an external clock source. Both variants share the same core integration of FSK modulation and demodulation capabilities within a compact surface-mount package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Design changes should be evaluated against the original datasheet specifications to ensure functional equivalence in HART protocol compliance and power consumption profiles.

FAQ

What is the primary difference between the AD5700 and AD5700-1 models?

The AD5700-1 includes a precision internal RC oscillator, which eliminates the need for an external crystal or clock source. The standard AD5700 requires an external clocking solution.

Does the AD5700-1 require external buffering for the HART output?

No, the device contains a buffered HART output that provides extra drive capability, removing the need for external buffering components.

What is the maximum supply current consumption in receive mode?

The maximum supply current consumption in receive mode is 115 µA.