Milpitas, Calif.The LT5575 high linearity direct conversion I/Q demodulator from Linear Technology Corp. is designed to sharply reduce the cost of 3G and WiMAX basestation receivers.
According to Linear, the LT5575's extended operating frequency range from 800-MHz to 2.7-GHz covers all of the cellular and 3G infrastructure, WiMAX and RFID bands. It can convert from RF directly to baseband at DC or low frequency, resulting in simplified receiver designs, reduced component count and use of lower cost, low frequency components.
The LT5575 offers a IIP3 of 28dBm and IIP2 of 54.1dBm at 900MHz, and an IIP3 of 22.6dBm and IIP2 of 60dBm at 1.9-GHz. The device has a conversion gain of 3dB, which when combined with a DSB Noise Figure of 12.7dB produces what the company touts as excellent receiver dynamic range. The device's I (In-phase) and Q (Quadrature phase) outputs have typical amplitude and phase matching of 0.04-dB and 0.6 degree, respectively.
The LT5575 is capable of supporting multi-band basestations, covering the 850-MHz GSM/EDGE bands and the 1.9-GHz/2.1-GHz 3G wireless services (including CDMA2000, WCDMA, UMTS, and TD-SCDMA).
The LT5575 operates from a single 5V supply, drawing a quiescent supply current of 132-mA. The device comes in a 16-lead 4mm x 4mm QFN package.
Pricing: Starts at $7.75 each in 1,000 piece quantities.
Availability: Immediately from stock.
Data Sheet: click here.
Linear Technology Corp., 1-408-432-1900, www.linear.com.