![]() What exactly ‘enhanced’ means (compared to ‘regular’ auto-tune in Monza R6) is unclear from public documentation, so we need to await mass-produced labels to understand the improvements.įor most applications in retail, reading distance was not a limiting factor in applications before this generation of label ICs. Impinj M700 introduces ‘enhanced’ Auto-tune. This ensures better performance, even in challenging conditions. NXP has a similar technology in UCode8 called ‘Self Adjust’. With Monza R6, Impinj introduced a feature called ‘Auto-tune’ that automatically optimises sensitivity, even when conditions are sub-optimal. Reality is unfortunately a bit more complicated: the sensitivity of the whole RFID label (IC plus antenna) does not only depend on the IC, but also on a number of other factors (size of the label, antenna design, material the label is placed on, region of the world, etc.). For reference, an improvement of 3 dB in label sensitivity results in a 40% increase in reading distance. Roughly, there is a 0.5 dB improvement in IC sensitivity per year - and this trend is continued with the introduction of the M700 series. The chart below shows the IC sensitivity versus the year of introduction. Moreover, an improved sensitivity also leads to better readability of ‘stacked’ labels when they are close together. ![]() ![]() The lower the sensitivity, the less power an IC needs to get turned, the longer the reading distance. The read sensitivity of an RFID IC is the fundamental parameter defining the maximum reading distance you can achieve between a RFID label and a reader. We’ll discuss three themes: improved performance, attention for privacy and driving down cost. In this blog post, you’ll learn how this new generation of products stacks up against other products from Impinj and competing vendors - and see what new innovations are integrated. Impinj recently launched the M700 series of RAIN RFID label ICs (Integrated Circuits, the chip containing data on the RAIN RFID label).
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