MELEXIS MLX90108D, MLX90108E Datasheet

MLX90108

64bit Read Only Transponder

MLX90108 64bit Read Only Transponder Page 1 of 6 Rev1.6 5-Feb-01

Features

• Very small chip size

• Optimized for Low cost

• Integrated tuning and buffer capacitance

• Low power consumption, for maximum operating distance

• Deep modulation for maximum reading distance

• Operating frequency [100; 150kHz]

• Mask programmable modulation schemes and data rates.

Applications

• Automotive Key, Access control, ID cards, Laundry ticketing, Consumer goods, Industrial

Applications

Ordering Information

Part No. Temperature Range Package
MLX90108 25 °C Consumer Sawed wafer on frame, with/without Gold bumps

-40 to 85 °C Automotive Bare die in blistertape with/without Gold bumps
SOIC-8 150mils

Production parts available Q2 2000

Functional Diagram Description

The MLX90108 is a dedicated 64 bit Read Only
(RO) Transponder (TAG). Clock and power
supply are taken from the electromagnetic field.
By switching a resistor in parallel to the resonant
circuit formed by the integrated tuning capacitor
and the external coil, the transponder amplitude
modulates the electromagnetic field. Encoding of
the data and data rate depend on the version.
It is a low cost solution for high volume
applications. The tuning and buffer capacitors are
integrated on chip. Operating frequency (SRF)
range is [100; 150]kHz.
The unique identification code (ID) is EEPROM
programmed in test mode during probing. Data
coding and data rate are mask programmed. An
optimized layout for gold bumps and a standard
version are available for all options. This allows
the device to be integrated into any assembly
form.

Coil

GND

MLX90108

C

tune

L

MLX90108

64bit Read Only Transponder

MLX90108 64bit Read Only Transponder Page 2 of 6 Rev1.6 5-Feb-01

MLX90108 Electrical Specifications

All specifications are valid for Manchester, Biphase and PSK encoding, and for 2kbaud and 4kbaud and
8kbaud data rate options, Toper = -40°C to 85°C, Operating frequency = 120kHz (unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Units

Regulated supply voltage VDD (2) 1.2 4.0 V
Sensitivity level Manch/Biph Vac (3) 200 150 mV
Sensitivity level PSK Vac (3) 600 400 mV
EEPROM data retention Tret Critical reading ID 10 1000 year

Weak power: Vac = 200mVpp 0.2 4 V(4)
Medium power: Vac = 5Vpp 2.8 7.5 V(4)

Modulation Depth ASK

High power: Vac = 20Vpp 5 10 V(4)

Coil-GND tune capacitor Toper=25oC 77.2 80 82.8 pF(5)

IclampLow VdutDC = +/- 2V 40 1000 nADC input current clamping
IclampHigh VdutDC = +/- 10V 1 3.5 10 mA

Notes:

Note (1): All specification values are tested 100%, or

guaranteed by characterization.
Note (2): Maximum supply voltage is generated by

forcing 10mA between coil and ground pin.
Note (3): Continuous (without POR restart) normal

reading of the 64bit ID on test set up as depicted
besides.

Note (4): Min = Vbottom (modulation on),
Max = Vtop (modulation off).

Note (5): Statistical spread on wafer basis within one lot is 3.5%. Temperature shift is typically -0.5% on -40°C,
and +1% at 85°C. On the MLX90108D a maximum Lot to lot spread of 20% is possible: average of a lot can vary

between 64 and 96pF.

Vac

50

90108

DUT

Vdut

C1 C2

Cpar=10pF

L=6.8mH

Qrc @ 120KHz=48.8

C1+C2=250pF

Vin

COIL

GND