AD5700-1BCPZ-R5

Overview

The AD5700-1BCPZ-R5 is a single-chip, low-power HART FSK half-duplex modem compliant with the HART physical layer. It integrates modulation, demodulation, signal detection, and filtering functions. The device features a precision internal oscillator, eliminating the need for external crystals. It operates on a supply voltage range of 1.71 V to 5.5 V with a maximum receive mode current of 115 µA. The package is a 4 mm × 4 mm LFCSP.

Feature Summary

• Fully integrated HART-compliant FSK modem with minimal external component requirements
• Precision internal RC oscillator eliminates the need for an external crystal
• Buffered HART output provides extra drive capability without external buffering
• Suitable for intrinsically safe applications due to ultralow power consumption

Applications

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

Procurement Notes

Verify the specific suffix R5 indicates reel packaging when sourcing. Confirm the B grade corresponds to the required temperature and performance specifications. Ensure the internal oscillator variant matches the design intent to avoid unnecessary external clock components.

Selection Notes

Select this model over the standard AD5700 if board space optimization is critical, as it removes the requirement for an external crystal and load capacitors. Verify that the system logic levels are compatible with the IOVCC supply range of 1.71 V to 5.5 V. Consider the thermal resistance of the LFCSP package for the specific PCB layout.

Part Context

This component belongs to the AD5700/AD5700-1 series of HART modems. The AD5700-1 variant specifically includes a precision internal oscillator, distinguishing it from the AD5700 which requires an external clock source. Both share identical pinouts and functional blocks except for the clock generation circuitry.

Replacement Considerations

The AD5700BCPZ-R5 serves as a direct hardware-compatible substitute but requires an external crystal or clock source instead of using the internal oscillator.