MC33690 Datasheet, PDF (19/24 Pages) Motorola, Inc – Standalone Tag Reader Circuit

Freescale S^Me^Cm³³i⁶c⁹o⁰nductor, Inc.
VBAT
VSS
L_A
C_A
Figure 14 : Standalone configuration with two wires bus
C₁
NC
GATE
NC
SOURCE
C₂
C_{3 VDD}
10µF 100nF
R_A ^VSS
TD1
R₁
R₂
RD
TD2
CEXT
C_{EXT 10nF}
AGND
VSUP
STARC
NC
LVR
8.2pF
XTAL1
8MHz
XTAL2 ^1MΩ _8.2pF
MODE1 _VDD
MODE2
NC
DOUT
VBAT
510Ω
K
Tx
AM
NC
Rx
If no external MOS transistor is necessary to increase the voltage regulator current capability, the pins GATE
and SOURCE must be left unconnected.
C₁ is not required for the STARC functionality and only acts as a reservoir of energy.
To preserve the demodulator sensitivity, C_EXT and R₂ should be connected to AGND, and VSS connected to
AGND using a low resistance path.
© Motorola, Inc., 2002.
F^Mo^Or ^TM^Oo^Rr^Oe^LAIn^Sfo^EMrm^ICa^Ot^Nio^Dn^UCO^Tn^ORT^Sh^Pis^ROP^Dro^Ud^Cu^TSct,
Go to: www¹⁹.freescale.com
revision 4.8, 5 February 2002