تگ rfid 125khz

Low Frequency RFID Chip

The common main frequency is 125KHz. Generally, 125Khz RFID tag labels are passive, and provide energy supply and data transmission through inductive coupling. The biggest advantage of the low-frequency RFID chip is that the tag is less affected when the tag is close to metal or liquid items. At the same time, the low-frequency system is very mature and the price of the reading and writing device is low.

But the disadvantages are the short reading distance, the inability to read multiple tags at the same time (anti-collision), and the low amount of information. The storage capacity of general chips is from 128 bits to 512 bits. Mainly used in access control systems, animal chips, car alarms, and toys.

Although the low-frequency system is mature and the price of reading and writing equipment is low, due to its low resonance frequency, the tag needs to make a winding inductor with a large inductance value, and often requires an off-chip resonance capacitor. In fact, the cost of the tag is higher than the other frequency.