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| 型号： | TRF3702IRHCR |
| 厂商： | Texas Instruments |
| 文件页数： | 28/39页 |
| 文件大小： | 0K |
| 描述： | IC QUADRATURE MODULATOR 16-VQFN |
| 产品培训模块： | RFID Technology and Applications |
| 标准包装： | 3,000 |
| 功能： | 调制器 |
| LO 频率： | 1.5GHz ~ 2.5GHz |
| RF 频率： | 1.5GHz ~ 2.5GHz |
| P1dB： | 7dBm |
| 底噪： | -155dBm/Hz |
| 输出功率： | -2.5dBm |
| 电流 - 电源： | 170mA |
| 电源电压： | 4.5 V ~ 5.5 V |
| 测试频率： | 1.842GHz |
| 封装/外壳： | 16-VQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 配用： | TRF3702EVM-ND - TRF3702EVM |
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TRF3702
www.ti.com
SLWS149A – SEPTEMBER 2004 – REVISED AUGUST 2006
APPLICATION INFORMATION (continued)
0.8 mm
Power Pad
1.65 mm x 1.65 mm
Via 0.3 mm Drill
(4 Places)
1.2 mm
3.5 mm
1 mm x 0.432 mm
(16 Places)
3.2 mm
M0002-01
Figure 69. Board Layout for the TRF3702 Device
IMPLEMENTING A DIRECT UPCONVERSION TRANSMITTER USING A TI DAC
The TRF3702 is ideal for implementing a direct upconversion transmitter, where the input I, Q data can originate
from an ASIC or a DAC. Texas Instruments' line of digital-to-analog converters (DAC) is ideally suited for
interfacing to the TRF3702. Such DACs include, among others, the DAC290x series, DAC5672, and DAC5686.
This section illustrates the use of the DAC5686, which offers a unique set of features that make interfacing to
the TRF3702 easy and convenient. The DAC5686 is a 16-bit, 500 MSPS, 2 × –16 × interpolating dual-channel
DAC, and it features I, Q adjustments for optimal interface to the TRF3702. User-selectable, 11-bit offset and
12-bit gain adjustments can optimize the carrier and sideband suppression of the modulator, resulting in
enhanced performance and relaxed filtering requirements at RF. The preferred mode of operation of the
DAC5686 for direct interface with the TRF3702 at baseband is the dual-DAC mode. The user also has the
flexibility of selecting any one of the four possible complex spectral bands to be fed into the TRF3702. For
details on the available modes and programming, see the DAC5686 data sheet available at www.ti.com.
Figure 70 shows the DAC5686 in dual-DAC mode, which is best-suited for zero-IF interface to the TRF3702. In
this mode, a seamless, passive interface between the DAC output and the input to the modulator is used, so
that no extra components are needed between the two devices. The optimum dc offset level for the inputs to the
TRF3702 (VCM) is approximately 3.7 V. The output of the DAC should be centered around 3.3 V or less
(depending on signal swing), in order to ensure that its output compliance limits are not exceeded. The resistive
network shown in Figure 70 allows for this dc offset transition while still providing a dc path between the DAC
output and the modulator. This ensures that the dc offset adjustments on the DAC5686 can still be applied to
optimize the carrier suppression at the modulator output. The combination of the DAC5686 and the TRF3702
provides a unique signal-chain solution with state-of-the-art performance for wireless infrastructure applications.
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相关代理商/技术参数 |
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|---|---|
| TRF3702IRHCRG4 | 功能描述:调节器/解调器 1.5GHz-2.5GHz Quad Mod RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
| TRF3703 | 制造商:TI 制造商全称:Texas Instruments 功能描述:0.4-GHz TO 4-GHz QUADRATURE MODULATOR |
| TRF3703_07 | 制造商:TI 制造商全称:Texas Instruments 功能描述:0.4-GHz TO 4-GHz QUADRATURE MODULATOR |
| TRF3703_08 | 制造商:TI 制造商全称:Texas Instruments 功能描述:0.4-GHz TO 4-GHz QUADRATURE MODULATOR |
| TRF370315 | 制造商:TI 制造商全称:Texas Instruments 功能描述:0.35-GHz TO 4-GHz QUADRATURE MODULATORS |
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