NRF21540-QDAA-R

Overview

The NRF21540-QDAA-R is a Bluetooth range extender RF front-end module from Nordic Semiconductor, designed to enhance link robustness for nRF52 and nRF53 series SoCs. It operates within the 2.36 GHz to 2.5 GHz frequency band and features a +13 dB receive gain with a 2.5 dB noise figure. The device supports up to +20 dBm transmit output power, dynamically adjustable to +21 dBm. It functions on a 3 V supply, drawing 115 mA at peak TX. Operating temperatures range from -40 °C to +105 °C in a QFN-16 package.

Feature Summary

• Integrates power amplifier and low-noise amplifier to extend wireless communication range and improve link budget.
• Supports dynamic transmit power adjustment for regulatory compliance across different regions.
• Includes dual antenna ports to facilitate antenna diversity for enhanced signal reliability.

Applications

• Bluetooth Low Energy long-range sensor networks
• Zigbee and Thread mesh network nodes
• Industrial IoT devices requiring extended coverage

Procurement Notes

Verify that the specific suffix matches the required configuration for your design. Confirm RoHS compliance status and moisture sensitivity level requirements before integration. Ensure the supplier provides valid traceability documentation. Check lead times as they may vary based on production cycles. Validate that the packaging type aligns with your assembly capabilities.

Selection Notes

Select this component when using nRF52 or nRF53 series SoCs requires significant range extension beyond standard capabilities. It is suitable for applications needing high TX power and improved RX sensitivity. Consider the QFN-16 footprint for PCB layout constraints. Evaluate thermal management needs given the operating temperature range and current consumption profiles during transmission.

Part Context

This part belongs to the nRF21540 family of RF front-end modules. It serves as a complementary device to Nordic's wireless SoCs, specifically optimizing performance for short-range wireless solutions. The module simplifies design by integrating necessary amplification and switching components into a single compact package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs if considering alternative FEMs from other manufacturers.