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參數(shù)資料
| 型號： | LT5503 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 1.2GHz to 2.7GHz Direct IQ Modulator and Mixer |
| 中文描述： | 1.2GHz至2.7GHz的直接IQ調(diào)制器和調(diào)音臺 |
| 文件頁數(shù)： | 16/20頁 |
| 文件大?。?/td> | 210K |
| 代理商： | LT5503 |
LT5503
16
APPLICATIOU
W
U
U
EVALUATION BOARD
Figure 7 shows the circuit schematic of the evaluation
board. The MODRFIN, MODRFOUT and MIXRFOUT ports
are matched to 50
at 2.45GHz. The LO1IN port is
matched to 50
at 2.1GHz and the LO2IN port is internally
matched.
A 390
resistor is used to reduce the quality factor (Q) of
the modulator output and deliver an output power of
–3dBm typically. A lower value resistor may be used if the
desired output power is lower. For example, the output
power will be 3dB lower if a 200
resistor is used.
Inductors with high self-resonance frequency should be
used for L1 to L6.
For simpler evaluation in a lab environment, the evaluation
board includes op amps to convert single-ended I and Q
input signals to differential . The op amp configuration has
a voltage gain of two; therefore the peak baseband input
voltage should be halved to maintain the same RF output
power. The op amp configuration shown will maintain
acceptable differential balance up to 10MHz typically. It is
also possible to bypass the op amps and drive the
modulator’s differential inputs directly by connecting to
the four oversized vias on the board (V1, V2, V3 and V4).
Figure 7 also shows a table of matching network values for
designs centered at 1.9GHz and1.2GHz.
Figure 8 shows the evaluation board with connectors and
ICs. Figure 9 shows the test set-up with the upconverting
mixer and IQ modulator connected in a transmit configu-
ration. Refer to the demo board DC365A Quick Start Guide
for detailed testing information.
RF Layout Tips:
Use 50
impedance transmission lines up to the
matching networks, use of a ground plane is a must.
Keep the matching networks as close to the pins as
possible.
Surface mount 0402 outline (or smaller) parts are
recommended to minimize parasitic inductances and
capacitances.
Isolate the MODOUT pin from the LO2 input by putting
the LO2 transmission line on the bottom side of the
board.
The only ground connection is through the exposed pad
on the bottom of the package. This exposed pad must
be soldered to the board in such a way to get complete
RF contact.
Low impedance RF ground connections are essential
and can only be obtained by one or more vias tying
directly into the ground plane.
V
CC
lines must be decoupled with low impedance,
broadband capacitors to prevent instability.
Separate power supply lines should be used to isolate
the MODIN signal and other stray signals from the
MODOUT line. If possible, power planes should be
used.
Avoid use of long traces whenever possible. Long RF
traces in particular can lead to signal radiation and
degraded isolation, as well as higher losses.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT5503_09 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.2GHz to 2.7GHz Direct IQ Modulator and Mixer |
| LT5503EFE | 功能描述:IC DIRECT IQ MOD/MIXER 20-TSSOP RoHS:否 類別:RF/IF 和 RFID >> RF 調(diào)制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:調(diào)制器 LO 頻率:700MHz ~ 2.3GHz RF 頻率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 輸出功率:-1dBm 電流 - 電源:46mA 電源電壓:2.7 V ~ 3.6 V 測試頻率:1.75GHz 封裝/外殼:28-WFQFN 裸露焊盤 包裝:帶卷 (TR) |
| LT5503EFE#PBF | 功能描述:IC DIRECT IQ MOD/MIXER 20-TSSOP RoHS:是 類別:RF/IF 和 RFID >> RF 調(diào)制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:調(diào)制器 LO 頻率:700MHz ~ 2.3GHz RF 頻率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 輸出功率:-1dBm 電流 - 電源:46mA 電源電壓:2.7 V ~ 3.6 V 測試頻率:1.75GHz 封裝/外殼:28-WFQFN 裸露焊盤 包裝:帶卷 (TR) |
| LT5503EFE#TR | 功能描述:IC DIRECT IQ MOD/MIXER 20-TSSOP RoHS:否 類別:RF/IF 和 RFID >> RF 調(diào)制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:調(diào)制器 LO 頻率:700MHz ~ 2.3GHz RF 頻率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 輸出功率:-1dBm 電流 - 電源:46mA 電源電壓:2.7 V ~ 3.6 V 測試頻率:1.75GHz 封裝/外殼:28-WFQFN 裸露焊盤 包裝:帶卷 (TR) |
| LT5503EFE#TRPBF | 功能描述:IC DIRECT IQ MOD/MIXER 20-TSSOP RoHS:是 類別:RF/IF 和 RFID >> RF 調(diào)制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:調(diào)制器 LO 頻率:700MHz ~ 2.3GHz RF 頻率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 輸出功率:-1dBm 電流 - 電源:46mA 電源電壓:2.7 V ~ 3.6 V 測試頻率:1.75GHz 封裝/外殼:28-WFQFN 裸露焊盤 包裝:帶卷 (TR) |
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