SPS1M002 Smart Passive Sensor for Direct Moisture Sensing The SPS1M002 is a batteryfree wireless sensor for moisture level detection on nonmetal surfaces. Smart Passive Sensors use the MagnusS2 Sensor IC from RF Micron, a UHF RFID chip that is www.onsemi.com powered by RF energy harvesting from the UHF reader. The MagnusS2 utilizes the patented selftuning Chameleon engine that adapts the RF frontend to optimize performance in various environmental conditions. Changes in antenna detuning due to moisture contact are digitized by the sensor which can then be read by a standard EPC Gen 2 compliant reader. These sensor tags function in either the FCC defined UHF band or the ETSI UHF band The small form factor and batteryfree capabilities of Smart Passive Sensors allow them to be designed into applications where size and RF TAG 101.60X31.75 MM accessibility are at a premium. CASE 888AD/AE Features Single IC, Smart Passive Sensing ORDERING INFORMATION Small Form Factor Packages See detailed ordering and shipping information on page 3 of this data sheet. Direct Moisture Contact Sensing Onchip RSSI Sensor 64 bit TID and 128 bit EPC + 144 bit User Defined Memory EPC Class 1 Gen 2 v.2.0.0 ISO 18 0006C Compliant These Devices are PbFree, Halogen Free/BFR Free and are RoHS Compliant Applications Medical Industrial Facilities Management MAXIMUM RATINGS (T = 25C unless otherwise noted) A Rating Symbol Max Unit Human Body Model (Note 1) ESD 1 kV THERMAL CHARACTERISTICS Characteristic Symbol Max Unit Junction and Storage Temperature T , T 40 to +85 C J stg Range (Note 2) Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. Nonrepetitive current pulse at T = 25C, per JS001 waveform. A 2. Shelf Life minimum 2 years from date of manufacturing. This document contains information on some products that are still under development. ON Semiconductor reserves the right to change or discontinue these products without notice. Semiconductor Components Industries, LLC, 2017 1 Publication Order Number: July, 2017 Rev. 6 SPS1M002/DSPS1M002 ELECTRICAL CHARACTERISTICS (T = 25C unless otherwise noted) A Parameter Min Max Units Operating Frequency (Note 3) FCC 902 928 MHz ETSI 866 868 MHz Read Sensitivity (Note 4) 16 dBm Sensor Code 5 bits RSSI Code 5 bits TID 64 bits EPC (Note 5) 128 bits User Memory (Note 5) 144 bits 3. Sensors with A suffix operate in the FCC defined band and sensors with B suffix operate in ETSI band 4. Measured in free space, anechoic chamber with a linearly polarized antenna at 50 cm read distance 5. User Memory can be configured to be an EPC extension, effectively making a 272 bit EPC code Figure 1. Moisture Contact Test Area Moisture Sensing The SPS1M002 generates sensor codes from 0 to 31, with important to account for the frequency at which the sensor a free space sensor code average of 18. Figure 1 shows the was read. For both the wet and dry tests seen in Figure 1, the moisture sensitive portion of the tag used to collect the data resulting sensor values shifted around 5 codes over the FCC in Figure 2. The SPS1M002 with a damp cloth over the frequency range of 902928 MHz. This factor must be sensor yields a sensor value 5 codes lower than the dry test. accounted for in the reader software in order to ensure Due to the Smart Passive Sensors selftuning capability, the reliable wet vs. dry reads. For more information on how sensor code does shift over frequency as it tunes itself to Smart Passive Sensors generate sensor codes, please refer to maximize reflected power to the reader. This makes it Application Note AND9209/D. 35 30 25 Dry 20 Wet 15 10 5 0 800 825 850 875 900 925 950 975 1000 FREQUENCY (MHz) Figure 2. Sensor Code for Wet and Dry Conditions www.onsemi.com 2 SENSOR CODE VALUE