MICRF211AYQS-TR: A High-Performance 2.4 GHz ASK/OOK Superheterodyne Receiver
The MICRF211AYQS-TR is a highly integrated, low-power superheterodyne receiver IC designed for robust 2.4 GHz ASK/OOK (Amplitude Shift Keying/On-Off Keying) applications. Operating within the global ISM (Industrial, Scientific, and Medical) band, this device is engineered to deliver exceptional sensitivity and superior interference rejection, making it an ideal solution for a wide array of wireless systems, including remote keyless entry (RKE), home automation, industrial monitoring, and low-data-rate telemetry.
A key architectural advantage of the MICRF211AYQS-TR is its superheterodyne architecture. Unlike simpler superregenerative receivers, the superheterodyne design down-converts the incoming 2.4 GHz RF signal to a lower intermediate frequency (IF) for processing. This approach provides significantly enhanced selectivity and blocking performance, allowing the receiver to operate reliably even in the presence of other strong signals or interferers in the crowded 2.4 GHz spectrum. This makes it exceptionally resilient against noise, a critical requirement for automotive and industrial environments.
The device boasts an impressive sensitivity of -109 dBm, ensuring reliable data reception even with very weak transmitted signals, which directly extends the operational range of the end product. Furthermore, it features an integrated Phase-Locked Loop (PLL) and Image-Reject Mixer, which contribute to its stability and high level of integration. By requiring only a minimal number of external components—primarily a crystal reference oscillator and a few passive elements—the MICRF211AYQS-TR simplifies design-in, reduces the total bill of materials (BOM) cost, and minimizes the PCB footprint. Its operation from a single 2.4V to 3.6V supply and low current consumption are perfectly suited for battery-powered, portable, or always-on applications.
Designers will appreciate the IC's programmable data rate capability and RSSI (Received Signal Strength Indicator) output. The RSSI provides a DC voltage proportional to the strength of the received signal, which can be used for diagnostic purposes or to implement power control algorithms in a bidirectional link. Housed in a compact 16-pin QSOP package, the MICRF211AYQS-TR is form-factor optimized for space-constrained modern electronic designs.
ICGOODFIND: The MICRF211AYQS-TR stands out as a premier solution for reliable, low-power wireless data links at 2.4 GHz. Its high integration, exceptional sensitivity, and robust interference immunity offered by its superheterodyne architecture make it a top choice for developers seeking performance and reliability in license-free band applications.
Keywords: Superheterodyne Receiver, 2.4 GHz, ASK/OOK, Low-Power, High Sensitivity
