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LT5579

更新时间： 2024-11-02 05:43:35
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
20页 243K
描述
1.5GHz to 3.8GHz High Linearity Upconverting Mixer

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LT5579 数据手册

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LT5579  
1.5GHz to 3.8GHz  
High Linearity  
Upconverting Mixer  
FEATURES  
DESCRIPTION  
The LT®5579 mixer is a high performance upconverting  
mixer optimized for frequencies in the 1.5GHz to 3.8GHz  
range. The single-ended LO input and RF output ports  
simplify board layout and reduce system cost. The mixer  
needs only –1dBm of LO power and the balanced design  
resultsinlowLOsignalleakagetotheRFoutput.At 2.6GHz  
operation, the LT5579 provides high conversion gain of  
1.3dB, high OIP3 of +26dBm and a low noise floor of  
–157.5dBm/Hz at a –5dBm RF output signal level.  
n
High Output IP3: +27.3dBm at 2.14GHz  
Low Noise Floor: –158dBm/Hz (P  
n
= –5dBm)  
OUT  
n
n
n
n
n
n
n
High Conversion Gain: 2.6dB at 2.14GHz  
Wide Frequency Range: 1.5GHz to 3.8GHz*  
Low LO Leakage  
Single-Ended RF and LO  
Low LO Drive Level: –1dBm  
Single 3.3V Supply  
5mm × 5mm QFN24 Package  
The LT5579 offers a high performance alternative to pas-  
sivemixers.Unlikepassivemixers,whichhaveconversion  
loss and require high LO drive levels, the LT5579 delivers  
conversion gain at significantly lower LO input levels and  
is less sensitive to LO power level variations. The lower  
LO drive level requirements, combined with the excellent  
LO leakage performance, translate into lower LO signal  
contamination of the output signal.  
APPLICATIONS  
n
GSM/EDGE, W-CDMA, UMTS, LTE and TD-SCDMA  
Basestations  
n
2.6GHz and 3.5GHz WiMAX Basestations  
n
2.4GHz ISM Band Transmitters  
High Performance Transmitters  
n
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
*Operation over wider frequency range is possible with reduced performance.  
Consult Linear Technology for information and assistance.  
TYPICAL APPLICATION  
Frequency Upconversion in 2.14GHz W-CDMA Transmitter  
LO INPUT  
–1dBm (TYP)  
Gain, NF and OIP3 vs  
RF Output Frequency  
LO  
30  
LT5579  
OIP3  
25  
T
= 25°C  
= 3.3V  
= 240MHz  
= f + f  
A
CC  
V
GND  
20  
15  
f
f
IF  
BIAS  
11Ω  
LO RF IF  
SSB NF  
GAIN  
IF  
INPUT  
RF  
OUTPUT  
40nH  
MABAES0061  
4:1  
10  
5
82pF  
82pF  
1.8nH  
+
–
IF  
1
5
RF  
0.45pF  
2
3
33pF  
4
IF  
0
1900 2000  
2100  
2200  
2300  
2400  
40nH  
11Ω  
RF FREQUENCY (MHz)  
V
CC  
5579 TA01a  
5579 TA01b  
V
CC  
3.3V  
1μF  
100pF  
1nF  
5579f  
1
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