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LTC5541_09

更新时间： 2024-02-18 22:06:19
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
16页 243K
描述
1.3GHz to 2.3GHz High Dynamic Range Downconverting Mixer

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LTC5541_09 数据手册

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LTC5541  
1.3GHz to 2.3GHz  
High Dynamic Range  
Downconverting Mixer  
FEATURES  
DESCRIPTION  
TheLTC®5541ispartofafamilyofhighdynamicrangepassive,  
high gain downconverting mixers covering the 600MHz to  
4GHzfrequencyrange.TheLTC5541isoptimizedfor1.3GHz  
to2.3GHzRFapplications.TheLOfrequencymustfallwithin  
the 1.4GHz to 2.0GHz range for optimum performance. A  
typicalapplicationisaLTEorW-CDMAreceiverwitha1.7GHz  
to 2.2GHz RF input and low-side LO.  
n
Conversion Gain: 7.8dB at 1950MHz  
n
IIP3: 26.4dBm at 1950MHz  
n
Noise Figure: 9.6dB at 1950MHz  
n
16dB NF Under +5dBm Blocking  
n
High Input P1dB  
n
3.3V Supply, 630mW Power Consumption  
n
Shutdown Pin  
n
50Ω Single-Ended RF and LO Inputs  
The LTC5541 is designed for 3.3V operation, however; the  
IF amplifier can be powered by 5V for the highest P1dB.  
An integrated SPDT LO switch with fast switching accepts  
two active LO signals, while providing high isolation.  
n
LO Inputs 50Ω Matched when Shutdown  
n
High Isolation LO Switch  
0dBm LO Drive Level  
High LO-RF and LO-IF Isolation  
Small Solution Size  
n
n
n
The LTC5541’s high conversion gain and high dynamic  
range enable the use of lossy IF filters in high-selectivity  
receiver designs, while minimizing the total solution cost,  
board space and system-level variation.  
n
20-Lead (5mm × 5mm) QFN package  
APPLICATIONS  
n
Wireless Infrastructure Receivers  
High Dynamic Range Downconverting Mixer Family  
(LTE, W-CDMA. TD-SCDMA, UMTS, GSM1800)  
PART#  
RF RANGE  
LO RANGE  
n
Point-To-Point Microwave Links  
LTC5540  
LTC5541  
LTC5542  
LTC5543  
600MHz –1.3GHz  
1.3GHz – 2.3GHz  
1.6GHz – 2.7GHz  
2.3GHz – 4GHz  
700MHz – 1.2GHz  
1.4GHz – 2.0GHz  
1.7GHz – 2.5GHz  
2.4GHz – 3.6GHz  
n
High Dynamic Range Downmixer Applications  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
Wideband Receiver  
Wideband Conversion Gain, IIP3  
and NF vs IF Output Frequency  
190MHz  
SAW  
190MHz  
BPF  
1nF  
V
IF  
CCIF  
8.8  
8.6  
8.4  
8.2  
8.0  
7.8  
7.6  
7.4  
7.2  
7.0  
6.8  
28  
26  
24  
22  
20  
18  
16  
14  
12  
10  
8
1nF  
150nH  
ADC  
AMP  
3.3V or 5V  
150nH  
22pF  
1μF  
IIP3  
RF = 1950 30MHz  
LO = 1760MHz  
+
–
IF  
IF  
P
= 0dBm  
LO  
22pF  
TEST CIRCUIT IN FIGURE 1  
LO2  
LO1  
LTC5541  
IMAGE  
BPF  
SYNTH 2  
IF  
2.2pF  
RF  
1920MHz  
TO  
RF  
ALTERNATE LO FOR  
FREQUENCY-HOPPING  
G
C
LNA  
LO  
1980MHz  
22pF  
SHDN  
(0V/3.3V)  
BIAS  
SYNTH 1  
SHDN  
NF  
220  
V
V
V
CC3  
LOSEL  
CC2  
CC1  
LO  
1760MHz  
160  
170  
180  
190  
200  
210  
V
3.3V  
CC  
LO SELECT  
(0V/3.3V)  
IF OUTPUT FREQUENCY (MHz)  
1μF  
22pF  
5541 TA01  
5541 TA02  
5541f  
1
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