MLX90109_06 Datasheet, PDF (4/15 Pages) Melexis Microelectronic Systems – 125kHz RFID Transceiver

MLX90109
125kHz RFID Transceiver
5 MLX90109 Electrical Specifications
DC Operating Parameters T_A = -40^oC to 85^oC, F_res = 125kHz, V_DD = 3.1 to 5.5V
Antenna parameters: L_ant = 73.6uH, Q_ant =17.3Ω, Z_ant=1kΩ
Parameter.
Symbol Test Conditions
Min
Typ
Max
Units
Supply Voltage
Resonance Frequency
VDD
3.1
Fres
(Depends on the resonance
frequency of the antenna)
100
Frequency drift with temperature ∆ F_res (T) Fres = 125 kHz
-1
Sensitivity (note 1)
Vsens
(Depends on the application)
Amplitude Offset (note 2)
Vos
0
Power down voltage
(on MODU pin)
Vpd
VDD=5V
VDD=3.1V
4.0
2.2
Power up voltage
(on MODU pin)
Vpu
VDD=5V
VDD=3.1V
3.2
1.3
Power down Current
IDD,pn
VMODU = VDD
0
Supply Current (excluding
antenna supply current) (note 3)
IDD
VDD=5V, VMODU = 0.8V
Antenna supply current (note 4)
IDD,ant
(Depends on the application)
Leakage current on pins COIL,
MODE, SPEED, MODE, DATA
Ileak
(Power down)
Output voltage DATA and
CLOCK pin
Vol
Pull-up resistance Rpu > 2kΩ
Table 3: Electrical specifications
5.5
V
125
150 kHz
10
0.15
1.8
2.8
+1
%
30
mVpp
0.35
V
4.9
3.0
V
4.3
2.4
V
1.5
A
3.0
mA
mA
1.0
A
0.4
V
Note 1: The sensitivity is defined as the minimum
amplitude of the 2kHz- modulation, generated by the
transponder, demodulated and decoded by the reader.
This parameter depends on the application:
• the value of VDD
• the antenna
• the code sent to the reader
Note 2: The antenna amplitude voltage is:
Vant = VDD – VMODU + Vos
Note 3: The supply current of the device depends on the
antenna drive current IDD,ant:
Typically: IDD ≈ 1.3 mA + IDD,ant / 6.3
Note 4: The antenna supply current (called IDD,ant) is the
equivalent DC supply current driven by the chip through
the antenna.
3901090109
Rev 008
Page 4 of 15
Data Sheet
Jun/06