Dual, SiGe High-Linearity, High-Gain, 1800MHz to 2900MHz Downconversion Mixer with LO Buffer/Switch
Lowest Noise, Highest Linearity 1800MHz to 2900MHz Dual, SiGe Mixer for WCS, LTE, WiMAX, WCDMA, and MMDS Base Stations, Featuring Superior IIP3, NF and 2 x 2 Spurious Performance
The MAX19997A dual downconversion mixer is a versatile, highly integrated diversity downconverter that provides high linearity and low noise figure for a multitude of 1800MHz to 2900MHz base-station applications. The MAX19997A fully supports both low- and high-side LO injection architectures for the 2300MHz to 2900MHz WiMAX™, LTE, WCS, and MMDS bands, providing 8.7dB gain, +24dBm input IP3, and 10.3dB NF in the low-side configuration, and 8.7dB gain, +24dBm input IP3, and 10.4dB NF in the high-side configuration. High-side LO injection architectures can be further extended down to 1800MHz with the addition of one tuning element (a shunt inductor) on each RF port.
The device integrates baluns in the RF and LO ports, an LO buffer, two double-balanced mixers, and a pair of differential IF output amplifiers. The MAX19997A requires a typical LO drive of 0dBm and a supply current guaranteed below 420mA to achieve the targeted linearity performance.
The MAX19997A is available in a compact 6mm x 6mm, 36-pin thin QFN lead-free package with an exposed pad. Electrical performance is guaranteed over the extended temperature range, from TC = -40°C to +85°C.
Key Features
Applications/Uses
1800MHz to 2900MHz RF Frequency Range
1950MHz to 3400MHz LO Frequency Range
50MHz to 500MHz IF Frequency Range
Supports Both Low-Side and High-Side LO Injection
8.7dB Conversion Gain
+24dBm Input IP3
10.3dB Noise Figure
+11.3dBm Input 1dB Compression Point
70dBc Typical 2 x 2 Spurious Rejection at PRF = -10dBm
Dual Channels Ideal for Diversity Receiver Applications
Integrated LO Buffer
Integrated LO and RF Baluns for Single-Ended Inputs
Low -3dBm to +3dBm LO Drive
Pin Compatible with the MAX19999 3000MHz to 4000MHz Mixer
Pin Similar to the MAX9995/MAX9995A and MAX19995/MAX19995A 1700MHz to 2200MHz Mixers and the MAX9985/MAX9985A and MAX19985/MAX19985A 700MHz to 1000MHz Mixers
42dB Channel-to-Channel Isolation
Single +5.0V or +3.3V Supply
External Current-Setting Resistors Provide Option for Operating Device in Reduced-Power/Reduced-Performance Mode
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