RF/IF variable-gain amplifier fits wireless infrastructure apps - Embedded.com

RF/IF variable-gain amplifier fits wireless infrastructure apps


Analog Devices extended its portfolio of RF ICs with an analog-control variable-gain amplifier (VGA) that offers exceptional linearity over a broad frequency range for wireless infrastructure applications, such as cellular base station radio transceivers. The AD8368 is optimized to maintain dynamic range of transceivers, ensuring that both weak and strong incoming call signals are effectively handled and maintained. In addition, the part simplifies and reduces the number of external components required by integrating an accurate root-mean-square (rms) power detector on-chip, which enables a complete automatic gain control (AGC) loop within a 4- by 4-mm package.

The AD8368 can sustaining high linearity (OIP3 of 34 dBm at 70 MHz) at the highest intermediate frequencies, allowing it to be used in all wireless standards, including 2G and 3G, and 802.16 (WiMAX). The 380-MHz frequency range allows the device to be used in both receive and transmit paths within any wireless infrastructure standard where the use of one or more AGC loops optimizes the base station dynamic range or allows the designer to add additional gain for optimal signal dynamic range and sensitivity.

Sampling now, full production scheduled for April. It's priced at $4.55 per unit in 1000-piece quantities, is available in a 24-pin LFCSP (lead frame chip-scale package), and is specified over an operating temperature range of –40°C to +85°C. For more information, visit www.analog.com/AD8368.

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