MLX90109_06 MELEXIS [Melexis Microelectronic Systems], MLX90109_06 Datasheet - Page 11

• Manufacturer Part Number: MLX90109_06
• Description: 125kHz RFID Transceiver
• Manufacturer: MELEXIS [Melexis Microelectronic Systems]

10 Typical configuration: READ/WRITE ON/OFF keying (FDX-B100)
The basic principle is to switch the voltage on MODU between 0V and V
maximum amplitude in less than 3 periods when MODU is stepped down from V
power-down (set V
antenna’s quality factor Q
microcontroller could be used to decrease the fall time (refer to the application note MLX90109 “100%
modulation (ON/OFF Keying)”.
Note : Care should be taken to the capacitor C1 which may reduce the fall time.
3901090109
Rev 008
10.1 Application diagram
MODU
up to V
ant
. For fast protocols, an additional drain resistor on MODU controlled by the
DD
) will let the antenna fade-out with a time constant, depending on the
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125kHz RFID Transceiver
DD
. The antenna will reach its
DD
MLX90109
to V
SS
. Setting the chip in
Data Sheet
Jun/06