ST STW82100B 1850-2400 MHz下变换解决方案
ST公司的 STW82100B是RF（ 1850 - 2400 MHz）的下变换器，可提供8dB的增益，10.5 dB NF以及非常高的输入线性，IIP3可高达 +25.5 dBm，中频（IF）放大器的频率范围从70MHz到400MHz，适用于蜂窝设备的Rx和Tx。本文介绍了STW82100B主要特性，方框图，以及多种工作模式和典型应用电路图。
The STMicroelectronics STW82100B is an integrated down converter providing 8 dB of gain, 10.5 dB NF, and a very high input linearity by means of its passive mixer.
Embedding two wide band auto calibrating VCOs and an integer-N synthesizer, the STW82100B is suitable for both Rx and Tx requirements for Cellular infrastructure equipment.
The integrated RF balun and internal matching permit direct 50 ohm single-ended interface to RF port. The IF output is suitable for driving 200-ohm impedance filters.By embedding a DAC with dual current output to drive an external PIN diode attenuator, the STW82100B replaces several costly discrete components and offers a significant footprint reduction.
The STW82100B device is designed with STMicroelectronics advanced 0.35 μm SiGe process. Its performance is specified over a -40℃ to +85℃ temperature range.
STW82100B主要特性：
■ High linearity:
– IIP3: +25.5 dBm
– 2FRF-2FLO spurious rejection: 77 dBc
■ Noise figure:
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