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MAX19985AETX+T

更新时间： 2024-02-17 11:35:21
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美信 - MAXIM 开关
页数 文件大小 规格书
23页 1519K
描述
Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch

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19-4185; Rev 0; 8/08  
Dual, SiGe, High-Linearity, 700MHz to 1000MHz  
Downconversion Mixer with LO Buffer/Switch  
MX1985A  
General Description  
Features  
The MAX19985A high-linearity, dual-channel, downcon-  
version mixer is designed to provide approximately  
8.7dB gain, +25.5dBm of IIP3, and 9.0dB of noise fig-  
ure for 700MHz to 1000MHz diversity receiver applica-  
tions. With an optimized LO frequency range of  
900MHz to 1300MHz, this mixer is ideal for high-side  
LO injection architectures in the cellular and new  
700MHz bands. Low-side LO injection is supported by  
the MAX19985, which is pin-pin and functionally com-  
patible with the MAX19985A.  
o 700MHz to 1000MHz RF Frequency Range  
o 900MHz to 1300MHz LO Frequency Range  
o 50MHz to 500MHz IF Frequency Range  
o 8.7dB Typical Conversion Gain  
o 9.0dB Typical Noise Figure  
o +25.5dBm Typical Input IP3  
o +12.6dBm Typical Input 1dB Compression Point  
o 76dBc Typical 2LO-2RF Spurious Rejection at  
In addition to offering excellent linearity and noise per-  
formance, the MAX19985A also yields a high level  
of component integration. This device includes two  
double-balanced passive mixer cores, two LO buffers,  
a dual-input LO selectable switch, and a pair of differ-  
ential IF output amplifiers. On-chip baluns are also inte-  
grated to allow for single-ended RF and LO inputs.  
P
RF  
= -10dBm  
o Dual Channels Ideal for Diversity Receiver  
Applications  
o 48dB Typical Channel-to-Channel Isolation  
o Low -3dBm to +3dBm LO Drive  
o Integrated LO Buffer  
The MAX19985A requires a nominal LO drive of 0dBm  
and a typical supply current of 330mA at V  
= +5.0V  
CC  
or 280mA at V  
= +3.3V.  
CC  
o Internal RF and LO Baluns for Single-Ended  
The MAX19985/MAX19985A are pin compatible with  
the MAX19995/MAX19995A series of 1700MHz to  
2200MHz mixers and pin similar with the MAX19997A/  
MAX19999 series of 1850MHz to 3800MHz mixers,  
making this entire family of downconverters ideal for  
applications where a common PCB layout is used  
across multiple frequency bands.  
Inputs  
o Built-In SPDT LO Switch with 46dB LO1-to-LO2  
Isolation and 50ns Switching Time  
o Pin Compatible with the MAX19995/MAX19995A  
Series of 1700MHz to 2200MHz Mixers  
o Pin Similar to the MAX19997A/MAX19999 Series  
The MAX19985A is available in a 6mm x 6mm, 36-pin  
thin QFN package with an exposed pad. Electrical per-  
formance is guaranteed over the extended temperature  
of 1850MHz to 3800MHz Mixers  
o Single +5.0V or +3.3V Supply  
range of T = -40°C to +85°C.  
C
o External Current-Setting Resistors Provide Option  
for Operating Device in Reduced-Power/Reduced-  
Performance Mode  
Applications  
850MHz WCDMA and cdma2000® Base Stations  
700MHz LTE/WiMAX™ Base Stations  
GSM850/900 2G and 2.5G EDGE Base Stations  
iDEN® Base Stations  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
36 Thin QFN-EP*  
36 Thin QFN-EP*  
MAX19985AETX+  
MAX19985AETX+T  
Fixed Broadband Wireless Access  
Wireless Local Loop  
+Denotes a lead-free/RoHS-compliant package.  
*EP = Exposed pad.  
Private Mobile Radios  
Military Systems  
T = Tape and reel.  
cdma2000 is a registered trademark of Telecommunications  
Industry Association.  
Typical Application Circuit and Pin Configuration appear at  
end of data sheet.  
WiMAX is a trademark of WiMAX Forum.  
iDEN is a registered trademark of Motorola, Inc.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
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