MLX90109 Datasheet, PDF (3/9 Pages) List of Unclassifed Manufacturers – 125kHz RFID Integrated Transceiver

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
R_damp
C_R
R_par
L_R
L_tag
MLX90109 Parallel Resonant transceiver
Page 3 of 9
Rev 1.4 19-Dec-00