DEMO90121DA

Manufacturer Part NumberDEMO90121DA
DescriptionKIT DEMO RFID DOOR ACCESS
ManufacturerMelexis Inc
TypeRFID (Radio Frequency Identification)
DEMO90121DA datasheet
 


Specifications of DEMO90121DA

ContentsReader Board, Antenna Board, 3 tag cards, Battery, Battery cable, Software and DocumentationFor Use With/related ProductsMLX90121
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Page 1/25

Download datasheet (380Kb)Embed
Next
Features and Benefits
(1)
Conforms with ISO14443B
Conforms with ISO15693
Programmable encoder and decoder
Low external component count
(1) RATP / Innovatron Technology
Ordering Information
Part No.
Temperature Suffix
MLX90121
E (-40° C to 85° C)
1. Functional Diagram
Attenuation
resistor
RX
Analog
functions
TX
Impedance
matching
2. Description
The MLX90121 is an ISO compliant 13.56MHz
RFID transceiver integrated circuit.
The main features include user selectable
modulation depth in write mode, whereas single
sub-carrier, FSK and PSK modulations are
recognized in the read mode.
3901090121
Rev. 009
Applications
Portable data terminals
Access control readers
Contact-less payment terminals
Smart label printer
Package Code
FR
(SSOP20, 209 mils)
The receiver is based on a diode envelope
detector, followed by an IF filter and amplifier. A
logarithmic amplifier is used for single sub-
carrier detection, ensuring fast and clean data
recovery. The limiting output of the log amp is
used for FSK and PSK recovery.
MLX90121
The transmitter uses a built in open drain output
Digital
transistor, which can provide up to 250 miliwatts
functions
of RF power to a 50 ohms load with a 5 volts
power supply using the recommended matching
network. This is suitable for most short to mid
range applications. A simplified antenna and
matching network can be used, at the expense
Serial data
interface
of a reduced reading range, for example in
hand-held reader applications.
The chip is configured with a serial interface. A
Microcontroller
synchronization signal is available when the
majority voting is used.
Digital part contains FSK (423 / 484kHz) and
PSK (847kHz) decoders and a programmable
encoder to facilitate data handling with a low
cost microcontroller. The encoder can be
programmed with 6 different patterns.
The chip can also be used as an analog front-
end, in direct mode.
Page 1 of 26
MLX90121
13.56MHz RFID Transceiver
Option code
FSK
Data Sheet
Sept.-2009

DEMO90121DA Summary of contents

  • Page 1

    Features and Benefits (1) Conforms with ISO14443B Conforms with ISO15693 Programmable encoder and decoder Low external component count (1) RATP / Innovatron Technology Ordering Information Part No. Temperature Suffix MLX90121 E (-40° 85° Functional Diagram Attenuation ...

  • Page 2

    FEATURES AND BENEFITS ....................................................................................................................... 1 APPLICATIONS............................................................................................................................................ 1 ORDERING INFORMATION......................................................................................................................... 1 1. FUNCTIONAL DIAGRAM................................................................................................................... 1-1 2. DESCRIPTION.................................................................................................................................... 2-1 3. GLOSSARY OF TERMS ....................................................................................................................... 3 4. ABSOLUTE MAXIMUM RATINGS ....................................................................................................... 3 5. MLX90121 ELECTRICAL SPECIFICATIONS ...................................................................................... 3 6. MLX90121 SPECIFIC SPECIFICATIONS............................................................................................. 4 ...

  • Page 3

    Glossary of Terms 4. Absolute Maximum Ratings Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum- rated conditions for extended periods may affect device reliability. 5. MLX90121 Electrical Specifications T = -40 ºC to +85 ºC, ...

  • Page 4

    MLX90121 Specific Specifications DC Operating Parameters T A otherwise specified) 3901090121 Rev. 009 - +70 Page MLX90121 13.56MHz RFID Transceiver C according to ...

  • Page 5

    Notes 1. Parameter measured using recommended output matching network. 2. This parameter is measured using a base band signal for all specified modulation modes. The measurement is made at the DOUT output with the input diode detector bypassed. 3. The ...

  • Page 6

    General Description Power supply The 90121 requires a nominal volts external power supply. Operation is guaranteed between 2.7 and 5.5 Volts. The current drain depends on the antenna impedance and the output matching network configuration. Care ...

  • Page 7

    Applications Information This schematic has been optimized to drive a fifty ohms resistive antenna, using a five volts power supply. Functional description The transmitter output TX is connected to the supply by means of a choke L3 ...

  • Page 8

    Block Diagram RMOD 13.56MHz 10. Digital Interface The MLX90121 is driven by four signals: MODE and RTB pins are used to select the operating mode and DIN and CK pins are used to configure the chip ...

  • Page 9

    Operating Modes 11. 11.1. Definitions There are two main operating modes: MODE = 0 : Configuration Mode MODE = 1 : Communication Mode The configuration mode allows writing in the configuration registers. It will configure all parameters in the transceiver. ...

  • Page 10

    MODE DIN CK RTB After sending address and data, the MODE line is asserted high and the chip is ready to receive the next register configuration. Notes register does not contain eight bits, write ‘0’ in the ...

  • Page 11

    Direct Transmission Before analog processing, data transmission can be either direct or pre-processed by means of hardware accelerators. Direct transmission can be performed with the following setup: Data has to be transmitted in real time by the microcontroller on ...

  • Page 12

    The ISO15693 protocol, mode 1 out of 256, is implemented using three symbols. Start of frame (SOF), end of frame (EOF) and pulses encoding result of the combination of these three symbols. Note The position of the symbol Sym1 encodes ...

  • Page 13

    Symbol Transmission CK and DIN inputs are used to transmit symbols. On each rising edge of the CK signal, DIN is sampled to encode the address of the corresponding symbol. This means that each address of the seven available symbols ...

  • Page 14

    Reception 11.3.2.a. Analog Setup For a proper reception, the analog chain has to be configured according to the following parameters in the AnalogConfig register: ByPassAll: It bypasses the analog filters in the analog chain. Must be enabled for AM ...

  • Page 15

    Direct Reception After analog processing, data reception can be either direct or pre-processed by hardware accelerators, according to the configuration of the SelDOUT parameter in the DigitalConfig register. Note The output phase of PSK decoder is either normal or ...

  • Page 16

    MVTime DecTime Re f   1  MVTime _ max 37 . ISO examples Note For Manchester coding, majority voting is on half bit portions only. In addition, the MVMode parameter in the DigitalConfig register ...

  • Page 17

    Example in ISO1569-Dual Sub-carrier 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 ...

  • Page 18

    Example in ISO15693-Single Sub-carrier Input Signal 11.4. Power Modes This chip has three power modes. To select one of these modes write the PowerState parameter in the . PowerState register Power Down If the Power Down mode is selected, the ...

  • Page 19

    Configuration Registers The following tables explain the meaning of the bit configurations in the 13 registers. Notes Notes 3901090121 Rev. 009 13.56MHz RFID Transceiver 1 0 Unused Page MLX90121 Data Sheet Sept.-2009 ...

  • Page 20

    Notes Notes Symbol 6 is hard-coded to 0xFF (11111111). 3901090121 Rev. 009 13.56MHz RFID Transceiver Unused Page MLX90121 Data Sheet Sept.-2009 ...

  • Page 21

    Configuration Registers: ISO Configuration Examples Notes All values are in hexadecimal notation. Transmitter is switched on. 3901090121 Rev. 009 0 -- Unused -- Unused Page MLX90121 13.56MHz RFID Transceiver Data Sheet Sept.-2009 ...

  • Page 22

    Standard information regarding manufacturability of Melexis products with different soldering processes Our products are classified and qualified regarding soldering technology, solderability and moisture sensitivity level according to following test methods: Reflow Soldering SMD’s (Surface Mount Devices) IPC/JEDEC J-STD-020 Moisture/Reflow ...

  • Page 23

    Package Information The device is packaged pin lead free SSOP package. 1 VDD1 VSS3 19 3 MOD RES2 18 4 VSS1 VDD3 17 5 XOUT DSYNC 16 6 XIN ...

  • Page 24

    Rev. 009 13.56MHz RFID Transceiver Page MLX90121 Data Sheet Sept.-2009 ...

  • Page 25

    Disclaimer 1) The information included in this documentation is subject to Melexis intellectual and other property rights. Reproduction of information is permissible only if the information will not be altered and is accompanied by all associated conditions, limitations and ...