RFID LF Module
Model :
PML125K
A reader with PML125K serves both as a magnetic field generator and a decoder to energize a tag and receive transmitted data from it. In other words, an AC power is generated across the coil whenever the magnetic filed pass through the antenna coil of tag. Then, the voltage will power up the tag to transmit its stored information back to the reader. It is so called backscattering. Signal transmission rate is around 1K bit to 4K bit per second. It is a form of modulated Signal. A reader through its coil antenna can receive these signals. Demodulation process followed, these signals are transformed to digital data strings for further decoding. By using PML125K, A variety of chip brands are supported; such as, EM, Microchip, Philips, Temic, and so forth. It will be your simple solution with low cost and less effort to implement your complex RF system.
| PIN | Description | Pin name | Function | Min | Typ | Max | Unit |
| 1 | Data output supply | DATA |
Digital output from demodulation |
3 | 5 | 5.5 | V |
| 2 | Voltage(1) | VCC |
Suppl voctage for digital circuit |
3 | 5 | 5.5 | V |
| 3 | Input frequency | OSC-IN |
Reference frequency to internal circuit |
4M | Hz | ||
| 4 | Ground(1) | GND(1) | Digital ground | V | |||
| 5 | Modularion input | WRITE | VL<0.3V, VH>VCC | 5 | V | ||
| 6 | Deliver output(1) | LT1 | VDD-0.6V | V | |||
| 7 | Supply voltage(2) | VDD |
Supply voltage for analog circuit |
3 | 9 | 12 | V |
| 8 | Deliver input(1) | RT1 | 120 | 560 | 1.5K | ||
| 9 | Deliver output(2) | LT2 | VDD-0.6V | V | |||
| 10 | Deliver input(2) | RT2 | Same as RT1 | ||||
| 11 | Ground(2) | GND(2) | Analog ground | V | |||
| 12 | RF input | RF-IN | Resonent input | 20Vp-p | 450Vp-p | V |
Purpose
WFE-125K-xx series provide either single direction or bidirection communication through
contactless radio frequency (RF) wave. Amplitude Shift Keying (ASK) mode is employed
as a modulation method to carrier signal in a radio frequency of 125K Hz. It is used to
accomplish actual modulation of signal transmission from a tag to a reader in a speed
fallen in 1K bit to 4K bit per second.
Mobile / PDA application
RFID integrated mobile phone or PDA is shown in market now. And most of mobile phone key manufacturers are R&D mobile phone with frequency 13.56 and UHF Gen2. The idea is to integrated RFID module into mobile phone/sensor to enable consumers to read proximity label.
Intelligent Shelf
The great part of Intelligent Shelf is to raise the revenue which can make sure no shortage on shelf and no need clerk to check anymore. When combine selling mechanism in the future, supporting system can record selling data, and have cross checking among leaving/selling of products displayed on shelf. For example, how many times “product A” leave the shelf? How many “product A” were sold? How many clients take “product A” and purchase it after taking it from shelf? All those information are helpful for companies to analyze selling condition of their products which could apply to chain stores and saving the cost of human resources.