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參數(shù)資料
| 型號： | TDA5212 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | ASK/FSK 915MHz Single Conversion Receiver |
| 中文描述： | 詢價/ FSK信號915MHz單一轉(zhuǎn)換接收器 |
| 文件頁數(shù)： | 30/51頁 |
| 文件大小： | 1222K |
| 代理商： | TDA5212 |
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Applications
4 - 9
TDA 5212
preliminary
Wireless Components
Specification, May 2003
content of FSK signal remains at 180μV/kHz. The cutoff frequencies of the
bandpass have to be chosen such that the spectrum of the data signal is influ-
enced in an acceptable amount.
In case that the user data is containing long sequences of logical zeros the
effect of the drift-off of the bit slicer threshold voltage can be lowered if the offset
voltage inherent at the negative input of the slicer comparator (Pin20) is used.
The comparator has no hysteresis built in.
This offset voltage is generated by the bias current of the negative input of the
comparator (i.e. 20nA) running over the external resistor R. This voltage raises
the voltage appearing at pin 20 (e.g. 1mV with R = 100k ). In order to obtain
benefit of this asymmetrical offset for the demodulation of long zeros the lower
of the two FSK frequencies should be chosen in the transmitter as the zero-
symbol frequency.
In the following figure the shape of the above mentioned bandpass is shown.
frequenzgang.WMF
Figure 4-8
Frequency characterstic in case of FSK mode
The cutoff frequencies are calculated with the following formulas:
v
0dB
3dB
v-3dB
f
20dB/dec
-40dB/dec
f1
f2
f3
gain (pin19)
DC
0.18mV/kHz
2mV/kHz
C
k
R
k
R
f
330
330
2
1
1
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| TDA5250D2 | ASK/FSK 868MHz Wireless Transceiver |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA5212_06 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ASK/FSK 915MHz Single Conversion Receiver |
| TDA5212T | 制造商:Infineon Technologies AG 功能描述:915MHZ ASK/FSK SUPHET RCVR TSS |
| TDA5212XUMA1 | 制造商:Infineon Technologies AG 功能描述:RF Receiver ASK/FSK 5V T/R 制造商:Infineon Technologies AG 功能描述:RF Receiver ASK/FSK 5V 28-Pin TSSOP T/R 制造商:Infineon Technologies AG 功能描述:CONTROL - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC FSK/ASK RECEIVER P-TSSOP-28 |
| TDA5220 | 功能描述:射頻接收器 ASK/FSK SINGLE CONVERSION RECEIVER RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| TDA5220T | 制造商:Infineon Technologies AG 功能描述:RKE RX RECIEVER, TSSOP-28, 3K |
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