MLX90129 datasheet(2/60 Pages) MELEXIS

2 / 60 page

MLX90129

13.56MHZ SENSOR TAG / DATALOGGER IC

Page 2 of 60

REVISION 011 - JUNE 13, 2017

3901090129

1. Functional Diagram

MLX90129

VSS

SENS2

SENS1

SENSSUP1

Sensor 1

Sensor 2

VFIELD

VBAT

Optional: Battery

Optional:

MICRO-

CONTROLLER

Serial SPI

EEPROM

SENS4

SENS3

SENSSUP2

COIL1

COIL2

RFID

antenna

XIN

XOUT

Optional: Crystal

Internal

Temperature

sensor

2. General Description

The MLX90129 combines a precise analog acquisition chain

for external resistive sensors, with a wide range of interface

possibilities.

It can be accessed and controlled through its ISO15693 RFID

front-end or via its SPI port.

Without any other components than a 13.56MHz tuned

antenna, it becomes an RFID temperature sensor.

For measuring other parameters, one or two resistive

sensors can be connected to create a battery-less sensing

point. The chip also provides a regulated voltage, derived

from the RFID field, that can be used to supply the external

sensing electronics of the application.

Adding a battery will enable the use of the standalone data

logging mode. The sensor output data is stored in the

internal 3.5kbits user memory. One can extend the storage

capacity by connecting an external EEPROM to the SPI port.

The SPI port can also connect the MLX90129 to a

microcontroller which allows more specific applications, like

adding actuating capability, LED driving

The MLX90129 has been optimized for low power, low

voltage battery and battery-less applications.

MLX90129 Datasheet(PDF) 2 Page - Melexis Microelectronic Systems

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