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| 型號： | U2270B |
| 英文描述： | Read / Write Base Station IC |
| 中文描述： | 讀/寫基站集成電路 |
| 文件頁數(shù)： | 7/13頁 |
| 文件大?。?/td> | 146K |
| 代理商： | U2270B |
U2270B
TELEFUNKEN Semiconductors
Rev. A3, 13-Dec-96
7 (13)
Function Table
CFE
MS
COIL1
COIL2
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Applications
To achieve the suitable application, consider the power
supply environment and the magnetic coupling situation.
The selection of the appropriate power supply operation
mode depends on the supply environment. If an
unregulated supply voltage in the range of V = 7 V to 16 V
is available, the internal power supply of the U2270B can
be used. In this case, the standby mode can be used and
an external low-current
μ
C can be supplied.
If a 5-V supply rail is available, it can be used to power
the U2270B. In this case please check that the voltage is
noise-free. An external power transistor is not necessary.
The application depends also on the magnetic coupling
situation. The coupling factor mainly depends on the
transmission distance and the antenna coils. The
following table lists the appropriate application for a
given coupling factor. The magnetic coupling factor can
be determined using the TEMIC test transponder coil.
Magnetic Coupling
Appropriate Application
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plus fine frequency tuning
k > 0.5%
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Diode feedback
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Diode feedback
The maximum transmission distance is also influenced by
the accuracy of the antenna’s resonance. Therefore, the
recommendations given above are proposals only. A good
compromise for the resonance accuracy of the antenna is
a value in the range of f
res
= 125 kHz
±
3%. Further details
concerning the adequate application and the antenna
design is provided in the TEMIC application note
ANT019 and in the TEMIC article “Antenna Design
Hints”.
The application of the U2270B includes the two
capacitors C
IN
and C
HP
whose values are linearly
dependend on the transponder’s data rate. The following
table gives the appropriate values for the most common
data rates. The values are valid for Manchester and
Bi-phase code.
Data Rate
f = 125 kHz
Input Capacitor
(C
)
Decoupling
Capacitor (C
)
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The following applications are typical examples. The
values of C
IN
and C
HP
correspond to the transponder’s
data rate only. The arrangement to fit the magnetic
coupling situation is also independent from other design
issues exept of one constellation. This constellation,
consisting of diode feedback plus fine frequency tuning
together with the two-rail power supply should be used
if the transmission distance is in the range of d
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10 cm.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| U2270B_08 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Read/Write Base Station |
| U2270B-MFP | 功能描述:IC RFID BASEREADER 125KHZ 16SOIC RoHS:否 類別:RF/IF 和 RFID >> RFID IC 系列:U2270B 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:497-5719-6 |
| U2270B-MFPG3 | 功能描述:IC BASEREADER RFID 125KHZ 16SOIC RoHS:是 類別:RF/IF 和 RFID >> RFID IC 系列:U2270B 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:497-5719-6 |
| U2270B-MFPG3Y | 功能描述:射頻無線雜項 Base Station RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel |
| U2270B-MFPY | 功能描述:射頻無線雜項 Base Station RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel |
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