双路RF下MAX19994ADE 主要特性以及所用元件表

　　The MAX19994A dual-channel downconverter is designed to provide 8.4dB of conversion gain， +25dBm input IP3， +14dBm 1dB input compression point， and a noise figure of 9.8dB for 1200MHz to 2000MHz diversity receiver applications. With an optimized LO frequency range of 1450MHz to 2050MHz， this mixer supports both high- and low-side LO injection architectures for the 1200MHz to 1700MHz and 1700MHz to 2000MHz RF bands， respectively.

　　In addition to offering excellent linearity and noise perfor-mance， the device 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 differential IF output amplifiers. Integrated on-chip baluns allow for single-ended RF and LO inputs. The MAX19994A requires a nominal LO drive of 0dBm and a typical supply current of 330mA at VCC = 5.0V， or 264mA at VCC = 3.3V.

　　The MAX19994A is pin compatible with the MAX9985/ MAX9995/MAX19985A/MAX19993/MAX19995/ MAX19995A series of 700MHz to 2500MHz mixers and pin similar with the MAX19997A/MAX19999 series of 1850MHz to 4000MHz mixers， making this entire family of downconverters ideal for applications where a common PCB layout is used across multiple frequency bands.

　　The device is available in a 6mm x 6mm， 36-pin thin QFN package with an exposed pad. Electrical performance is guaranteed over the extended temperature range， from TC = -40NC to +85NC.

　　Applications

　　WCDMA/LTE Base Stations

　　TD-SCDMA Base Stations

　　GSM/EDGE Base Stations cdma2000M Base Stations Wireless Local Loop

　　Fixed Broadband Wireless Access Private Mobile Radios

　　Military Systems

　　cdma2000 is a registered trademark of Telecommunications Industry Association.

　　Features

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　　S 8.4dB Typical Conversion Gain

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　　S +14dBm Typical Input 1dB Compression Point

　　S 68dBc Typical 2LO - 2RF Spurious Rejection at PRF = -10dBm

　　S Dual Channels Ideal for Diversity Receiver Applications

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　　S Low -6dBm to +3dBm LO Drive

　　S Integrated LO Buffer

　　S Internal RF and LO Baluns for Single-Ended Inputs

　　S Built-In SPDT LO Switch with 48dB LO-to-LO Isolation and 50ns Switching Time

　　S Pin Compatible with the MAX9985/MAX9995/ MAX19985A/MAX19993/MAX19995/MAX19995A Series of 700MHz to 2200MHz Mixers

　　S Pin Similar to the MAX19997A/MAX19999 Series of 1850MHz to 4000MHz Mixers

　　S Single 5.0V or 3.3V Supply

　　S External Current-Setting Resistors Provide Option for Operating Device in Reduced-Power/Reduced-Performance Mode