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CLRC63201T/0FE Datasheet(PDF) 101 Page - NXP Semiconductors

Part # CLRC63201T/0FE
Description  Multiple Protocol Contactless Reader IC
PDF  163 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

CLRC63201T/0FE Datasheet(HTML) 101 Page - NXP Semiconductors

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Philips Semiconductors
Product Specification Rev. 3.0; May 2003
Multiple Protocol Contactless Reader IC
CL RC632
101
Confidential
13.3.2 FORMULA FOR THE SOURCE RESISTANCE
The relative resistance Rsrel can be calculated by
GsCfgCW
EXP
GsCfgCW
rel
MANT
Rs
)
(
1
40
77
⋅
=
The relative resistance Rsrel during the modulation phase can be calculated using GsCfgMod, respectively.
13.3.3 CALCULATING THE EFFECTIVE SOURCE RESISTANCE
13.3.3.1 Wiring Resistance
Wiring and bonding add a constant offset to the driver resistance, that is relevant if TX1 and TX2 are
switched to low impedance. The additional resistance for TX1 can be set approximately to
Ω
≈
m
Rs
TX
wire
500
1
,
13.3.3.2 Effective Resistance
The source resistances of the driver transistors RsMaxP found in the Product Information Field (see chapter
6.2) are measured at production test with GsCfgCW set to 01hex. To get the driver resistance for a specific
value set in GsCfgMod the following formula may be used:
(
)
1
,
1
,
max,
,
TX
wire
rel
TX
wire
p
ref
x
Rs
Rs
Rs
Rs
Rs
+
⋅
−
=
.



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