Data Sheet

MFRC522 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.9 — 27 April 2016
112139 81 of 95
NXP Semiconductors
MFRC522
Standard performance MIFARE and NTAG frontend
15. Application information
A typical application diagram using a complementary antenna connection to the
MFRC522 is shown in Figure 27
.
The antenna tuning and RF part matching is described in the application note Ref. 1
and
Ref. 2
.
Fig 27. Typical application diagram
001aaj636
DVDD AVDD
supply
MICRO-
PROCESSOR
host
interface
TVDD
OSCIN OSCOUT
27.12 MHz
RX
VMID
antenna
TX1
TVSS
TX2
PVDD
2
31512
21 22
17
16
11
10, 14
13
4
5
6
23
18
PVSS
NRSTPD
IRQ
AVSS DVSS
MFRC522
R1
L0
C1
Ra
Ra
C1
L0
R2
C0
C0
C2
C2
Lant
C
Rx
C
vmid