參數(shù)資料
型號(hào): CLRC632
廠商: NXP Semiconductors N.V.
英文描述: Multiple Protocol Contactless Reader IC
中文描述: 多協(xié)議非接觸式讀卡器IC
文件頁數(shù): 99/163頁
文件大小: 948K
代理商: CLRC632
Philips Semiconductors
Product Specification Rev. 3.0; May 2003
Multiple Protocol Contactless Reader IC
CL RC632
99
Confidential
13.2 Operating Distance versus Power Consumption
The user has the possibility to find a trade-off between maximum achievable operating distance and power
consumption using different antenna matching circuits by varying the supply voltage at the antenna driver
supply pin TVDD. Different antenna matching circuits are described in the Application Note,
MIFARE
Design of MF RC500 Matching Circuit and Antennas
.
13.3 Antenna Driver Output Source Resistance
The output source conductance of TX1 and TX2 for driving a HIGH level may be adjusted via the value
GsCfgCW
in the
CwConductance Register
in the range from about 1 up to 100 Ohm. The output source
conductance of Tx1 and TX2 during the modulation phase may be adjusted via the value
GsCfgMod
in the
ModConductance Register
in the same range
.
The values given are relative to the reference resistance Rs
rel
,
that is measured during production test and stored in the CL RC632 E2PROM. It can be obtained from the
Product Information Field (see chapter 6.2). The electrical specification can be found in chapter 22.4.3.
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