參數(shù)資料
型號(hào)： TDA5211
廠商： INFINEON TECHNOLOGIES AG
英文描述： ZENER,SML4744,15V,5%,1W
中文描述： 詢價(jià)/ FSK信號(hào)單一轉(zhuǎn)換接收器
文件頁(yè)數(shù)： 23/52頁(yè)
文件大小： 1469K
代理商： TDA5211
Applications
4 - 3
TDA 5211
Wireless Components
Specification, May 2001
RSSI-AGC.wmf
Figure 4-2
RSSI Level and Permissive AGC Threshold Levels
The switching point should be chosen according to the intended operating sce-
nario. The determination of the optimum point is described in the accompanying
Application Note, a threshold voltage level of 1.8V is apparently a viable choice.
It should be noted that the output of the
3VOUT
pin is capable of driving up to
50μA, but that the
THRES
pin input current is only in the region of 40nA. As the
current drawn out of the
3VOUT
pin is directly related to the receiver power con-
sumption, the power divider resistors should have high impedance values. The
sum of R1 and R2 has to be 600k
in order to yield 3V at the
3VOUT
pin. R1
can thus be chosen as 240k
, R2 as 360k
to yield an overall
3VOUT
output
current of 5μA
1
and a threshold voltage of 1.8V
Note:
If the LNA gain shall be kept in either high or low gain mode this has to
be accomplished by tying the
THRES
pin to a fixed voltage. In order to achieve
high gain mode operation, a voltage higher than 2.8V shall be applied to the
THRES
pin, such as a short to the
3VOLT
pin. In order to achieve low gain
mode operation a voltage lower than 0.7V shall be applied to the
THRES
, such
as a short to ground.
As stated above the capacitor connected to the
TAGC
pin is generating the gain
control voltage of the LNA due to the charging and discharging currents of the
OTA and thus is also responsible for the AGC time constant. As the charging
and discharging currents are not equal two different time constants will result.
The time constant corresponding to the charging process of the capacitor shall
be chosen according to the data rate. According to measurements performed
at Infineon the capacitor value should be greater than 47nF.
1. note the 20k
resistor in series with the 3.1V internal voltage source
L
i
0
0.5
1
1.5
2
2.5
3
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
Input Level at LNA Input [dBm]
U
T
R
L
i
RSSI Level
相關(guān)PDF資料
PDF描述
TDA5212 ASK/FSK 915MHz Single Conversion Receiver
TDA5220 ASK/FSK Single Conversion Receiver
TDA5221 ASK/FSK Single Conversion Receiver
TDA5250 ASK/FSK 868MHz Wireless Transceiver
TDA5250D2 ASK/FSK 868MHz Wireless Transceiver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA5211T 制造商:Infineon Technologies AG 功能描述:315MHZ ASK/FSK SUPHET RCVR TSS
TDA5211XT 制造商:Infineon Technologies AG 功能描述:RF Receiver ASK/FSK 5V 28-Pin TSSOP T/R
TDA5211XUMA1 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:CONTROL - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC FSK/ASK RECEIVER P-TSSOP-28 制造商:Infineon Technologies AG 功能描述:IC LP FSK/ASK SHR P-TSSOP-28
TDA5212 功能描述:射頻接收器 CNTRL RF RECEIVER 928MHZ 5V RoHS:否 制造商:Skyworks Solutions, Inc. 類(lèi)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
TDA5212_06 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ASK/FSK 915MHz Single Conversion Receiver
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*