MLX90121 Просмотр технического описания (PDF) - Melexis Microelectronic Systems

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производитель

MLX90121

13.56MHz RFID Transceiver

Melexis Microelectronic Systems  

MLX90121

13.56MHz RFID Transceiver

Example in ISO1569-Dual Sub-carrier

Input Signal

DOUT

CK

MV start

Standard

ISO15693-Single Sub-carrier

ISO15693-Dual Sub-carrier

ISO14443-B

Reference for input signal

Rising edge

Rising edge

Rising / Falling edge

Data Slicer

LTC is an internal signal which controls the time constant of the comparator. This signal is switched to

ensure a proper decoding in ASK modes in order to improve the reading performances.

LTC is controlled according to the following parameters in the LTC register:

• LTCEn: it enables the LTC circuit.

• LTCDelay: delay to switch the time constant (see next table).

-

RSSI

+

LTC

Delay

LTCDelay

Recommended delay for ISO standard

Standard

ISO15693-Single Sub-carrier

DelayTime

4.72µs

LTCDelay

0x1F

3901090121

Rev. 009

Page 17 of 26

Data Sheet

Sept.-2009

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