MLX90121 Просмотр технического описания (PDF) - Melexis Microelectronic Systems

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производитель

MLX90121

13.56MHz RFID Transceiver

Melexis Microelectronic Systems  

MLX90121

13.56MHz RFID Transceiver

Serial link and digital I/O

Output current drive

Iol

Output voltage low

Vol

Output voltage high

Voh

Input voltage high

Vih

Input voltage low

Vil

CK pulse

TCK

General setup time

Ts

General hold time

Th

Pulse time between successive Tmw

registers writing

Crystal Oscillator

Frequency range

Fxtal

Start-up time

Tstart

Xtal series resistance

Vol ≤ 0.4 Volt

Iol max=4mA

Ioh max=4mA

“0” level pulse or “1” level pulse

4

mA

0

0.2 0.4 V

4.6 4.8

5V

0.7 * VDD

VDD + 0.3 V

-0.3

0.3 * VDD V

500

ns

60

ns

60

ns

5

µs

ISO compliant applications

13.56

2

50

MHz

5 ms

100 Ω

External clock signal

specifications

Min sine wave amplitude, AC

coupled

Input on pin XTAL2

Min sine wave amplitude, DC

coupled

Input on pin XTAL2

see note 3

1

Input has to be centered around

1

Vdd/2

VDD VPP

VDD VPP

XBUF output specifications

XBUF Low Level (Col)

XBUF High Level (Coh)

Rise and fall times (10%-90%)

1K load resistor

1K load resistor

1K load resistor//12pF

0.1

V

4.8

V

3

ns

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 external clock symmetry is of paramount importance. It has a direct influence on the transmitter

output power. When using a sine wave as external clock input, it must not show visible distortion. In

case a square wave is used, its duty cycle has to be equal to 50%.

3901090121

Rev. 009

Page 5 of 26

Data Sheet

Sept.-2009

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