MLX90109

· Highly Integrated transmitter-receiver for 125kHz ASK transponders
· Parallel antenna gives factor of Qreader improved power efficiency over serial antenna implementations
· Minimum reader PCB size with SO8 reader IC and minimum external components
· Integrated hardwired decoding for Biphase and Manchester ASK, 2kbit and 4kbit transponders.
· Direct amplitude modulation on the reader antenna for downlink to transponder.
· Power down mode with Brown out protection
· Optimized system cost
· Fast design-in, ease of implementation.

Car Immobilizers, portable readers, battery powered door locks, house held appliances, .

The MLX90109 is a single chip inductive RFID transmitter-receiver for the 125kHz range. It has been conceived for minimum system cost, and minimum power consumption, whilst offering all required flexibility for a state of the art AM Read-Write base station.

An external L and C of MLX90109 are connected as a parallel resonant circuit, which will determine the carrier frequency and the oscillator frequency of the reader. This eliminates zero modulation effects, and avoids the need for an external oscillator.

The antenna amplitude of MLX90109 can be adjusted externally on the fly. This allows straightforward modulation of the antenna amplitude to write to the transponder.

The reader IC can easily be switched to power down by switching the antenna amplitude to zero.

The MLX90109 can be configured to decode the transponder signal on-chip. In this case the decoded signal is available through a 2-wire interface of clock and data. For minimum interface wiring, the undecoded transponder signal can also be made available on a single wire interface.