Analog Devices Inc. (Wilmington, MA) introduced the new AD8370 high-linearity, fully differential, digitally controlled, variable gain amplifier (VGA) designed for use in wireless and wired communication networks. The AD8370 provides a 700MHz bandwidth (-3dB), enabling the part to be used at intermediate frequencies up to 380MHz. The AD8370 enables designers to select between two gain control ranges (a high-gain mode adjustable from +6dB to +34dB and a low-gain mode adjustable from –11dB to +17dB) through a three-bit serial interface.
The low inter-modulation distortion, high output compression, low noise and differential drive make the AD8370 suitable for high-speed, high-performance, analog-to-digital converters such as ADI’s 12-bit AD9226, AD9235, AD9433 or AD6640. The AD8370 is specified for use at a number of common intermediate frequencies (70MHz, 140MHz, 190MHz, 240MHz and 380MHz), enabling the part for use within the receive path automatic gain control loops within cellular infrastructure equipment such as GSM, CDMA and W-CDMA.
The AD8370 amplifier comes in a compact, 16-pin, TSSOP package and operates over the temperature range of –40°C to +85°C. Samples and pre-production quantities are available for immediate shipment. The AD8370 is priced at $4.20 per unit in 1,000-piece quantities.
