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參數(shù)資料
| 型號： | TDA5250D2 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | ASK/FSK 868MHz Wireless Transceiver |
| 中文描述： | 詢價/ FSK信號868MHz無線收發(fā)器 |
| 文件頁數(shù)： | 18/97頁 |
| 文件大?。?/td> | 2328K |
| 代理商： | TDA5250D2 |
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Functional Description
3 - 8
TDA 5250 D2
preliminary
Wireless Components
confidential
Specification, July 2002
3.4
Functional Blocks
3.4.1
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 +4dBm at 2.1V supply voltage. In low power mode the
transmit power is approximately -7dBm at 5V and -32dBm 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 3-2. 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.
3.4.2
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.
3.4.3
Downconverter 1
st
Mixer
The Double Balanced 1
st
Mixer converts the input frequency (RF) in the range
of 868-870 MHz to down to the intermediate frequency (IF) at approximately
290MHz. The local oscillator frequency is generated by the PLL synthesizer that
is fully implemented on-chip as described in Section 3.4.5. This local oscillator
operates at approximately 1157MHz in receive mode providing the above
mentioned IF frequency of 290MHz. The mixer is followed by a low pass filter
with a corner frequency of approximately 350MHz in order to prevent RF and
LO signals from appearing the 290MHz IF.
Table 3-2 Sub Address 00H: CONFIG
Bit
Function
D0
PA_PWR
Description
0= low TX Power, 1= high TX Power
Default
1
Table 3-3 Sub Address 00H: CONFIG
Bit
Function
D4
LNA_GAIN
Description
0= low Gain, 1= high Gain
Default
1
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| TDA5250D2_07 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ASK/FSK 868MHz Wireless Transceiver |
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| TDA5250XUMA1 | 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:TX/RX ASK/FSK 868-870MHZ 38TSSOP |
| TDA5251 | 功能描述:射頻接收器 2.1 - 5.5V FSK/ASK 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 |
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