參數(shù)資料
型號: MFRC50001T
廠商: NXP Semiconductors N.V.
元件分類: 通信及網(wǎng)絡(luò)
英文描述: Highly integrated ISO-IEC 14443 A reader IC
封裝: MFRC50001T/0FE<SOT287-1 (SO32)|<<http://www.nxp.com/packages/SOT287-1.html<1<week 15, 2005,;
文件頁數(shù): 91/110頁
文件大?。?/td> 841K
代理商: MFRC50001T
MFRC500_33
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.3 — 15 March 2010
048033
91 of 110
NXP Semiconductors
MFRC500
Highly Integrated ISO/IEC 14443 A Reader IC
15. Application information
15.1 Typical application
15.1.1
Circuit diagram
Figure 22
shows a typical application where the antenna is directly matched to the
MFRC500:
15.1.2
Circuit description
The matching circuit consists of an EMC low-pass filter (L0 and C0), matching circuitry
(C1 and C2), a receiver circuit (R1, R2, C3 and C4) and the antenna itself.
Refer to the following application notes for more detailed information about designing and
tuning an antenna.
MICORE reader IC family; Directly Matched Antenna Design
Ref. 1
MIFARE (14443 A) 13.56 MHz RFID Proximity Antennas
Ref. 2
.
15.1.2.1
EMC low-pass filter
The MIFARE system operates at a frequency of 13.56 MHz. This frequency is generated
by a quartz oscillator to clock the MFRC500. It is also the basis for driving the antenna
using the 13.56 MHz energy carrier. This not only causes power emissions at 13.56 MHz,
it also emits power at higher harmonics. International EMC regulations define the
amplitude of the emitted power over a broad frequency range. To meet these regulations,
appropriate filtering of the output signal is required.
Fig 22. Application example circuit diagram: directly matched antenna
001aak625
DVDD
RSTPD
AVDD
TVDD
DVDD
Reset
AVDD
TVDD
DVSS
control lines
data bus
IRQ
OSCIN
OSCOUT
13.56 MHz
AVSS
VMID
RX
TX2
TVSS
TX1
IRQ
15 pF
15 pF
C0
C0
C2a
C2b
C3
R2
R1
L0
L0
C1
C1
C4
100 nF
MICROPROCESSOR
BUS
MICROPROCESSOR
DEVICE
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