This document introduces the concept of RF receiver sensitivity (ATA5745/ATA5746), including the definition, measurement method, influencing factors and other related terms.
The note introduces the importance of receiver sensitivity in short‑range RF designs and defines key terms such as BER and jitter. It then describes the super‑heterodyne receiver architecture used in the ATA5745/ATA5746 devices.
Measurements are presented that show how data rate, modulation type, BER and jitter window size influence the minimum detectable signal. The document concludes with practical recommendations for comparing receivers and highlights the parameters that have the greatest impact on sensitivity.
| Operating frequency (reference design) | 315 MHz |
|---|---|
| ASK sensitivity (datasheet) | -114 dBm |
| Default BER used in measurements | 10⁻³ |
The default bit‑error‑rate used in the graphs is 10⁻³.