User's Manual

TI PROPRIETARY T E X A S I N S T R U M E N T S
INFORMATION -
Revision:
INTERNAL DATA R F I D SYSTEMS 0
S P E C I F I C A T I O N
Page 14 of 25
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Printed copies are not controlled documents - verify the correct revision before use.
For Q = ~20 (ISO15693 operations):


kR
PAR
29.1
(move to standard value of 1.3kΩ)
For Q = ~10 (ISO14443 and ISO15693 operations):


647
PAR
R
(move to standard value of 680Ω)
Smith Chart simulation for R
PAR
value = 1.3kΩ reveals theoretical parallel and series
capacitor values capacitor values to be 97pF and 51pF, respectively.
(This is < +2% change from the calculated total cap value.)
Smith Chart simulation for R
PAR
value = 680Ω (standard value) reveals theoretical
parallel and series capacitor values to be 82pF and 69pF, respectively.
(This is < +4% change from the calculated value.)