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| 型号： | TRF3705EVM |
| 厂商： | Texas Instruments |
| 文件页数： | 21/37页 |
| 文件大小： | 0K |
| 描述： | EVAL MODULE FOR TRF3705 |
| 标准包装： | 1 |
| 类型： | 正交调制器 |
| 频率： | 300MHz ~ 4GHz |
| 适用于相关产品： | TRF3705 |
| 已供物品： | 板 |
| 其它名称： | 296-31302 TRF3705EVM-ND |
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TRF3705
www.ti.com
SLWS223A – AUGUST 2011 – REVISED OCTOBER 2011
APPLICATION INFORMATION
Application Schematic
Figure 65 shows a typical TRF3705 application schematic.
BBI
49.9 W
49.9 W
PD
1
18
VCC
LO
Input
GND
LOP
2
3
Thermal Pad
17
16
GND
RF OUT
6.8 pF
RF
Output
LOM
4
15
GND
0.2 pF
49.9 W
GND
GC
5
6
14
13
GND
GND
49.9 W
49.9 W
BBQ
Figure 65. Typical Application Circuit
Power Supply and Grounding
The TRF3705 is powered by supplying a nominal 3.3 V to pins 18 and 24. These supplies can be tied together
and sourced from a single clean supply. Proper RF bypassing should be placed close to each power supply pin.
Ground pin connections should have at least one ground via close to each ground pin to minimize ground
inductance. The PowerPAD ? must be tied to ground, preferably with the recommended ground via pattern to
provide a good thermal conduction path to the alternate side of the board and to provide a good RF ground for
the device. (Refer to PCB Design Guidelines for additional information.)
Baseband Inputs
The baseband inputs consist of the in-phase signal (I) and the Quadrature-phase signal (Q). The I and Q lines
are differential lines that are driven in quadrature. The nominal drive level is 1-V PP differential on each branch.
The baseband lines are nominally biased at 0.25-V common-mode voltage (V CM ); however, the device can
operate with a V CM in the range of 0 V to 0.5 V. The baseband input lines are normally terminated in 50 Ω ,
though it is possible to modify this value if necessary to match to an external filter load impedance requirement.
Copyright ? 2011, Texas Instruments Incorporated
Product Folder Link(s): TRF3705
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TRF3705IRGE | 制造商:Texas Instruments 功能描述: |
| TRF3705IRGER | 功能描述:调节器/解调器 300MHz to 4GHz Quad- rature Modulator RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
| TRF3705IRGET | 功能描述:调节器/解调器 300MHz to 4GHz Quad- rature Modulator RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
| TRF3710 | 制造商:TI 制造商全称:Texas Instruments 功能描述:IQ DEMODULATOR |
| TRF3710EVM | 功能描述:射频开发工具 TRF3710EVM Eval Mod RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
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