AD8347-EVAL屬于開發(fā)板套件編程器的射頻評估開發(fā)套件開發(fā)板。由亞德諾半導體技術(shù)有限公司制造生產(chǎn)的AD8347-EVAL射頻評估和開發(fā)套件，開發(fā)板本系列中的產(chǎn)品適用于在已知實施環(huán)境中，提供能訪問射頻相關器件的功能或者有助于訪問該功能。所含的焦點產(chǎn)品范圍從射頻信號鏈元器件（如放大器和檢測器）到模塊化收發(fā)器，以及不直接包含焦點產(chǎn)品的適配器硬件，但此類硬件可供方便地訪問用戶單獨提供的特定射頻產(chǎn)品或系列。

GENERAL DESCRIPTION

The AD8347 is a broadband direct quadrature demodulator with RF and baseband automatic gain control (AGC) amplifiers. It is suitable for use in many communications receivers, performing

quadrature demodulation directly to baseband frequencies. The input frequency range is 800 MHz to 2.7 GHz. The outputs can be connected directly to popular A-to-D converters such as the

AD9201and AD9283. The RF input signal goes through two stages of variable gain amplifiers prior to two Gilbert-cell mixers. The LO quadrature phase splitter employs polyphase filters to achieve high quadrature accuracy and amplitude balance over the entire operating frequency range. Separate I and Q channel variable gain amplifiers follow the baseband outputs of the mixers. The

RF and baseband amplifiers together provide 69.5 dB of gain control. A precision control circuit sets the linear-in-dB RF gain response to the gain control voltage.

FEATURES

Integrated RF and baseband AGC amplifiers

Quadrature phase accuracy 1° typ

I/Q amplitude balance 0.3 dB typ

Third-order intercept (IIP3) +11.5 dBm @ min gain

Noise figure 11 dB @ max gain

AGC range 69.5 dB

Baseband level control circuit

Low LO drive ?8 dBm

ADC-compatible I/Q outputs

Single supply 2.7 V to 5.5 V

Power-down mode

28-lead TSSOP package

APPLICATIONS

Cellular base stations

Radio links

Wireless local loop

IF broadband demodulators

RF instrumentation

Satellite modems