參數(shù)資料
型號(hào)： HTCM400
廠商： NXP Semiconductors N.V.
英文描述： HITAG core module hardware
中文描述： 此外，HITAG核心模塊的硬件
文件頁(yè)數(shù)： 15/24頁(yè)
文件大小： 112K
代理商： HTCM400
2001 Oct 04
15
Philips Semiconductors
Product specification
HITAG core module hardware
HTCM400
11 INSTRUCTIONS FOR BUILDING HITAG
PROXIMITY ANTENNAS
The antenna is an important part in the data transmission
process between read and write device and transponder.
Therefore, you should be particularly careful when
implementing the antenna in order to achieve optimum
results.
An essential aspect in dimensioning HITAG proximity
antennas is the ratio between the antenna diameter and
the diameter of the transponder coil. This ratio should be
within the limit values 3 and 1. If the ratio is too big or too
small read/write distances can decrease and difficulties
during data transmission may occur. For applications in
which the transponders are only to be read, you can also
use antennas that do not meet these instructions.
11.1
Basics
Figure 12 shows the general architecture of a HITAG
proximity antenna and its connection to the HTCM400.
handbook, full pagewidth
ANTENNA
antenna equivalent
circuit
CORE
MODULE
R2
R1
TX1
RX
AGND
L
Cs
R2
Ls
Rs
Cs
Ia
Vo
VL
MGW273
Fig.12 Architecture of a proximity antenna.
When developing an antenna, it is important to take into
consideration the read/write device limits, i.e. maximum
antenna current and maximum voltage at the receiver
input. With an output voltage V
o
of approximately
2.5 V (p-p) the following limits apply to the HTCM400:
Maximum antenna current is 100 mA (p-p)
Maximum input voltage at the receiver (V
L
) is 32 V (p-p).
The resistor R1 (22
) in Fig.12 is used as current limiter.
It protects the output stage in the event of a possible short
circuit in the antenna and is already integrated in the
HTCM400. R2 (approximately 600 to 1000
) has only to
be used for antenna cable lengths of more than 50 cm.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HTCM400/EAE 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:HITAG core module hardware
HTCM400/EAE,122 功能描述:RFID HITAG CORE MODULE RoHS:否 類(lèi)別:RF/IF 和 RFID >> RFID IC 系列:- 其它有關(guān)文件:CR14 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- RF 型:收發(fā)器 頻率:13.56MHz 特點(diǎn):ISO14443-B 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SO 包裝:Digi-Reel® 其它名稱(chēng):497-5719-6
HTCM46 功能描述:機(jī)架和機(jī)柜配件 Top Cable Module 200 x 400 x 600mm RoHS:否 制造商:Bivar 產(chǎn)品:Rack Accessories 面板空間: 顏色:Black
HTCM66 功能描述:機(jī)架和機(jī)柜配件 Top Cable Module 200 x 600 x 600mm RoHS:否 制造商:Bivar 產(chǎn)品:Rack Accessories 面板空間: 顏色:Black
HTCM86 功能描述:機(jī)架和機(jī)柜配件 Top Cable Module 200 x 800 x 600mm RoHS:否 制造商:Bivar 產(chǎn)品:Rack Accessories 面板空間: 顏色:Black
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