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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)： | 29/51頁 |
| 文件大?。?/td> | 1222K |
| 代理商： | TDA5212 |
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Applications
4 - 8
TDA 5212
preliminary
Wireless Components
Specification, May 2003
4.6 ASK/FSK Switch Functional Description
The TDA5211 is containing an ASK/FSK switch which can be controlled via Pin
15 (MSEL). This switch is actually consisting of 2 operational amplifiers that are
having a gain of 1 in case of the ASK amplifier and a gain of 11 in case of the
FSK amplifier in order to achieve an appropriate demodulation gain character-
istic. In order to compensate for the DC-offset generated especially in case of
the FSK PLL demodulator there is a feedback connection between the thresh-
old voltage of the bit slicer comparator (Pin 20) to the negative input of the FSK
switch amplifier. This is shown in the figure below:
ask_fsk_datapath.WMF
Figure 4-7
ASK/FSK mode datapath
4.6.1
FSK Mode
The FSK datapath has a bandpass characterisitc due to the feedback shown
above (highpass) and the data filter (lowpass). The lower cutoff frequency f2 is
determined by the external RC-combination. The upper cutoff frequency f3 is
determined by the data filter bandwidth.
The demodulation gain of the FSK PLL demodulator is 180μV/kHz. This gain is
increased by the gain v of the FSK switch, which is 11. Therefore the resulting
dynamic gain of this circuit is 2mV/kHz within the bandpass. The gain for the DC
R
1
=100k
R
2
=100k
v = 1
19
R
4
=30k
R
3
=300k
DATA Out
A
D
typ. 2 V
1.5 V......2.5 V
0.18 mV/kHz
FSK PLL Demodulator
RSSI (ASK signal)
C
1
R
ASK/FSK Switch
ASK
FSK
+
-
+
-
22
25
C
C
2
20
ASK mode : v=1
FSK mode : v=11
21
15
MSEL
FFB
OPP
SLP
SLN
Comp
-
+
Data Filter
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA5220 | ASK/FSK Single Conversion Receiver |
| TDA5221 | ASK/FSK Single Conversion Receiver |
| TDA5250 | ASK/FSK 868MHz Wireless Transceiver |
| TDA5250D2 | ASK/FSK 868MHz Wireless Transceiver |
| TDA5251F1 | ASK/FSK 315MHz Wireless Transceiver |
相關(guān)代理商/技術(shù)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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