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參數(shù)資料
| 型號： | TDA5251F1 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | ASK/FSK 315MHz Wireless Transceiver |
| 中文描述： | 詢價/ FSK信號315MHz的無線收發(fā)器 |
| 文件頁數(shù)： | 18/88頁 |
| 文件大?。?/td> | 2086K |
| 代理商： | TDA5251F1 |
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TDA5251 F1
Version 1.0
Functional Description
Preliminary Specification
18
2003-02-18
Confidential
2.4
Functional Block Description
2.4.1
Power Amplifier (PA)
The power amplifier is operating in C-mode. It can be used in either high or low power mode. In
high-power mode the transmit power is approximately +13dBm into 50 Ohm at 5V and +6dBm at
2.1V supply voltage. In low power mode the transmit power is approximately +12dBm at 5V and -
34dBm at 2.1V supply voltage using the same matching network. The transmit power is controlled
by the
D0
-bit of the
CONFIG
register (subaddress 00H) as shown in the following
Table 2-2
. The
default output power mode is high power mode.
In case of ASK modulation the power amplifier is turned fully on and off by the transmit baseband
data, i.e. 100% On-Off-Keying.
2.4.2
Low Noise Amplifier (LNA)
The LNA is an on-chip cascode amplifier with a voltage gain of 15 to 20dB and symmetrical inputs.
It is possible to reduce the gain to 0 dB via logic.
2.4.3
The Double Balanced 1
st
Mixer converts the input frequency (RF) in the range of 315MHz down to
the intermediate frequency (IF) at approximately 105MHz. The local oscillator frequency is
generated by the PLL synthesizer that is fully implemented on-chip as described in
Section 2.4.5
.
This local oscillator operates at approximately 420MHz in receive mode providing the above
mentioned IF frequency of 105MHz. The mixer is followed by a low pass filter with a corner
frequency of approximately 175MHz in order to prevent RF and LO signals from appearing in the
105MHz IF signal.
Downconverter 1
st
Mixer
2.4.4
Downconverter 2
nd
I/Q Mixers
The Low pass filter is followed by 2 mixers (inphase I and quadrature Q) that convert the 105MHz
IF signal down to zero-IF. These two mixers are driven by a signal that is generated by dividing the
local oscillator signal by 4, thus equalling the IF frequency.
Table 2-2
Bit
D0
Sub Address 00H: CONFIG
Function
PA_PWR
Description
Default
1
0= low TX Power, 1= high TX Power
Table 2-3
Bit
D4
Sub Address 00H: CONFIG
Function
LNA_GAIN
Description
Default
1
0= low Gain, 1= high Gain
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| TDA5251F1_07 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ASK/FSK 315MHz Wireless Transceiver |
| TDA5251XUMA1 | 制造商:Infineon Technologies AG 功能描述:RF Transceiver ASK/FSK 2.5V/3.3V/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:TXRX FSK/ASK SGL LP TSSOP-38 |
| TDA5252 | 功能描述:射頻接收器 ASK/FSK WIRELESS TRANSCEIVER 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 |
| TDA5252G2 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ASK/FSK 915MHz Wireless Transceiver |
| TDA5252XUMA1 | 制造商:Infineon Technologies AG 功能描述:RF Transceiver ASK/FSK 2.5V/3.3V/5V 38-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:TXRX FSK/ASK SGL LP TSSOP-38 |
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