HT2MOA3S20SLASHESLASH1 datasheet(10/22 Pages) PHILIPS

tên linh kiện	HT2MOA3S20/E/1

Giải thích chi tiết về linh kiện	HITAGTM2 Chip Module

PDF	22 Pages

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nhà sản xuất	PHILIPS [NXP Semiconductors]

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10 / 22 page

Specifications of the HT2 MOA3 S20

Rev. 1.1

1997-08-19

Ht2moa3.doc/HS

Page 10 of 22

4 Coil Specifications

The HITAG 2 chip module has to be connected to a coil whose parameters are briefly described

in the following.

Equivalent circuit of the transponder

Xpc

Rpc

Cchip

Rchip

...

voltage at the connection pads

fres

...

resonant frequency of the transponder

Xpc

...

parallel reactance of the coil (f = 125 kHz)

Rpc

...

parallel resistance of the coil (f = 125 kHz)

...

parasitic capacitance of the package

Cchip

...

capacitance of the chip (Uc > 4 Vpp)

Rchip

...

resistance of the chip

fresc

...

self resonant frequency of the coil

Lpc

Xpc/2

πf (f = 125 kHz)

Lpc

7.72 mH

± x % (C

p = 0, x depends on the coil production process)

Cchip

210 pF ± 10 %

Rpc

45 k

[

fresc

750 kHz

Note: The parasitic capacitance of the package (Cp) must be considered.

()

2(C

C ).L

125 kHz

+ C

res

chip

res

chip

=⇒

Typical values for Cp

hot laminated cards:

Cp = 1.5 pF

moulded tags:

Cp = 6.0 pF

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