ST ST25R3911B User Manual

UM2042 Hardware
DocID029132 Rev 3 13/25
Figure 7. Antenna and matching network schematics
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C C
B B
A A
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Antenna.SchDoc
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A4
ST25R3911B-DISCO
MDG NFC & Reader Competence Center
TRIM1_0
TRIM1_1
TRIM1_2
TRIM1_3
TRIM2_0
TRIM2_1
TRIM2_2
TRIM2_3
RFO1
RFO2
GND
GND
TRIM1
TRIM2
GND
TRIM1TRIM2
Trim Capacitor Banks
GND
RFI1
RFI2
RFO1
RFO2
TRIM1_0
TRIM1_1
TRIM1_2
TRIM1_3
TRIM2_0
TRIM2_1
TRIM2_2
TRIM2_3
Antenna_Con
Antenna_Con
Antenna Connection
1
2
J403
1
2
3
J402
C407
d.n.p.
C404
d.n.p.
NFC Forum matching
GND GND
RFI1
RFI2
RFI1
RFO1
RFO2
TRIM1_0
TRIM1_1
TRIM1_2
TRIM1_3
TRIM2_0
TRIM2_1
TRIM2_2
TRIM2_3
RFI2
C401
C_82p_0603
C412
C_82p_0603
C402
C_10p_0603
C411
C_10p_0603
C403
C_180p_0603
C410
C_180p_0603
C405
C_680p_0603
C409
C_680p_0603
L401
270n
L402
270n
C415
C_5p6_0402
C416
C_5p6_0402
C417
C_12p_0402
C418
C_12p_0402
C419
C_27p_0402
C420
C_27p_0402
C421
C_56p_0402
C422
C_56p_0402
C403_NFCF
C_120p_0603
C410_NFCF
C_120p_0603
C406
C_120p_0603
C408
C_120p_0603
Antenna Loop
R401
R402
R401_NFCF
R402_NFCF
J405
closed 0R
J404
closed 0R
J401
closed 0R
J406
closed 0R
J407
closed 0R
Antenna Circuit incl. EMI Filter and Matching

ST ST25R3911B Specifications

General

Brand	ST
Model	ST25R3911B
Category	Microcontrollers
Language	English