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LTC5589

更新时间： 2024-09-24 14:57:19
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
46页 2333K
描述
700MHz 至 6GHz 低功率直接正交调制器

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LTC5589 数据手册

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LTC5589  
700MHz to 6GHz  
Low Power  
Direct Quadrature Modulator  
DescripTion  
FeaTures  
The LTC®5589 is a direct conversion I/Q modulator de-  
signed for low power wireless applications that enables  
direct modulation of differential baseband I and Q signals  
onanRFcarrier.Singleside-bandmodulationorside-band  
suppressed upconversion can be achieved by applying  
90° phase-shifted signals to the I and Q inputs. The I/Q  
baseband input ports can be either AC or DC coupled to a  
source with a common mode voltage level of about 1.4V.  
The SPI interface controls the supply current, modulator  
gain, and allows adjustments of I and Q gain and phase  
imbalance to optimize the LO carrier feedthrough and  
side-band suppression. The LO port can be driven with  
sine wave or square wave LO drive. A fixed LC network  
on the LO and RF ports covers 700MHz to 6GHz operat-  
ing range. An on-chip thermometer can be activated to  
compensate for gain-temperature variations. More ac-  
curate temperature measurements can be made using  
an on-chip diode. In addition, a continuous analog gain  
control (VCTRL) pin can be used for fast power control.  
n
Frequency Range: 700MHz to 6GHz  
n
Low Power: 2.7V to 3.6V Supply; 29.5mA  
n
Low LO Carrier Leakage: –43dBm at 1.8GHz  
n
Side-Band Suppression: –50dBc at 1.8GHz  
n
Output IP3: 19dBm at 1.8GHz  
n
Low RF Output Noise Floor: –157dBm/Hz at 30MHz  
Offset, P = 1.8dBm, f = 2.17GHz  
RF  
RF  
n
n
Sine Wave or Square Wave LO Drive  
SPI Control:  
Adjustable Gain: 19dB in 1dB Steps  
Effecting Supply Current from 9mA to 39mA  
I/Q Offset Adjust: –64dBm LO Carrier Leakage  
I/Q Gain/Phase Adjust: –61dBc Side-Band Suppressed  
24-Lead 4mm × 4mm Plastic QFN Package  
n
applicaTions  
n
Wireless Microphones  
n
Battery Powered Radios  
n
Vector Modulator  
L, LT, LTC, LTM, Linear Technology, and the Linear logo are registered trademarks and  
QuikEval is a trademark of Linear Technology Corporation. All other trademarks are the property  
of their respective owners.  
n
2.45GHz and 5.8GHz Transmitters  
n
Software Defined Radios (SDR)  
n
Military Radios  
Typical applicaTion  
EVM and Noise Floor vs RF Output  
Power and Digital Gain Setting  
with 1Ms/s 16-QAM Signal  
700MHz to 6GHz Direct Conversion Transmitter Application  
V
CTRL  
3.3V  
5
4
3
2
1
1nF + 4.7µF  
DG –19, 8.7mA  
DG –16, 12.7mA  
DG –12, 17.1mA  
DG –8, 22.3mA  
DG –4, 29.5mA  
DG 0, 39.2mA  
V
LTC5589  
CC  
SPI  
RF = 700MHz  
TO 6GHz  
V
V
I
I
I-DAC  
I-CHANNEL  
100pF  
0
–155  
–157  
–159  
–161  
–163  
–165  
PA  
0°  
0.2pF  
EN  
EN  
90°  
f
= 2.17GHz  
LO  
P
= 0dBm  
Q-DAC  
Q-CHANNEL  
LO  
THERMOMETER  
TTCK  
–20  
–16  
–12  
–8  
–4  
0
4
RF POWER (dBm)  
BASEBAND  
GENERATOR  
5589 TA01b  
0.8nH  
VCO/SYNTHESIZER  
0.1pF  
0.4pF  
5589 TA01a  
5589f  
1
For more information www.linear.com/LTC5589  
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