MLX90109(2000) 데이터 시트보기 (PDF) - Melexis Microelectronic Systems

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MLX90109
(Rev.:2000)

125kHz RFID Integrated Transceiver

Melexis Microelectronic Systems  

MLX90109

125kHz RFID Integrated Transceiver

Modulation depth range

White Noise rejection

Sensitivity

Vsens

Filter Gain

Filter ripple

Filter 3db BW slow

Filter 3db BW fast

Output voltage DATA and

CLOCK pin

Start up time

Vout

AM demodulation Delay time

MODU-IN ANTENNA-OUT

AM demodulation Delay time

Antenna input to Data output

AM demodulation Delay time

Antenna input to Data output

Modulation pulse width

deviation Antenna input to

Data output

See footnote 6

See footnote 7

Schmitt trigger hysteresis

SPEED = 1

SPEED = 0

Isink = 2.5mA

MODU = 5V to 1V

2kHz square wave modulation

Falling edge on antenna

MODE= floating (See footnote 8)

2kHz square wave modulation

Rising edge on antenna

MODE= floating (See footnote 8)

Antenna pulse width versus output pulse

width.

MODE= floating (See footnote 8)

68 % C

53

mV C

40

3 mV T

28

dB C

3

dB C

400 – 3.6k

Hz C

800 - 7.2k

Hz C

0.4 V C

8 ms C

0

us C

25

periods C

29

periods C

-4 0 +4 periods C

7 Modulation on the reader antenna is limited towards

maximum modulation depth, to prevent the reader from

going into power down.

Modudepth = (VPPmax-VPPmin)/( VPPmax+VPPmin)

Since Vppmin (Vmodu=4.2V)=1.6V,

and Vppmax (Vmodu=0.8V)=8.4, modudepthmax=68%.

8 The data slicer samples every 4 clock periods(=1/Fres),

therefore any pulse on the output can be 4 periods off.

Test set up Block diagram

VDD

8765

90109

1234

VDD

Rdamp

CR

Rpar

LR

Ltag

MLX90109 Parallel Resonant transceiver

Page 3 of 9

Rev 1.4 19-Dec-00

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