mlx90109 Melexis Company, mlx90109 Datasheet - Page 9

• Manufacturer Part Number: mlx90109
• Description: 125khz Rfid Transceiver
• Manufacturer: Melexis Company

Note for equation (5): Mind that the quality factor of the antenna (Q
and the quality factor of the capacitance as:
(9)
So, a capacitance with a low quality factor may also reduce the antenna impedance.
9 Typical configuration: READ ONLY
The MLX90109 is a highly integrated reader IC. In the application schematic below, only two resistors to set
V
for a better noise cancellation.
The interface with the microcontroller can be realized with only one connection. In this case, the mode pin is
left floating and the integrated decoding is not used.
3901090109
Rev 008
MODU
9.1 Application diagram
9.2 Absolute minimum schematic
are required, next to the antenna inductance and tune capacitor. Capacitors C1 and C
Q
ant
Q
coil
//
Q
capaci
tan
ce
Page 9 of 15
ant
) result in the quality factor of the coil
125kHz RFID Transceiver
MLX90109
D
can be added
Data Sheet
Jun/06