LNAs with Multiple Gain States Optimize HSPA/LTE System Performance



Maxim Integrated Products introduces the MAX2666/MAX2668 low-noise amplifiers (LNAs) for high-data-rate wireless protocols such as HSPA and LTE. Each LNA features three programmable gain states, allowing customers to dynamically adjust linearity and sensitivity to optimize system performance in the face of varying input-signal strengths. If interference from adjacent signals is particularly high, as is often the case with mobile devices, the gain can be increased to maintain optimum blocker performance. Ensuring peak system performance regardless of signal conditions, the MAX2666/MAX2668 are well suited for HSPA/LTE-based radio systems such as smartphones and tablets. Maxim's advanced SiGe BiCMOS process enables these broadband LNAs to combine superior performance characteristics with an ultra-compact footprint. They deliver 15dB of gain; feature a low 1.0dB noise figure for improved receive sensitivity over discrete or CMOS solutions; and operate over the I, IV, V, VI, VII, and X UMTS frequency bands. Maxim's innovative design enables a tiny package (1.5mm x 1.0mm x 0.55mm), thereby facilitating their use in space-constrained applications such as handheld devices and cellular-based data cards. Only one external component is required to complete the board-level design. As is common with Maxim's LNAs, customers can expect longer battery life in their end equipment due to low power consumption and low supply voltage. The MAX2666/MAX2668 operate with a low 3.8mA (typ) supply current and less than 100μA in the lowest gain mode. They run off of a 2.7V to 3.3V supply. Fully specified over the -40°C to +85°C extended temperature range, the MAX2666/MAX2668 are available in a 6-pin, ultra-thin land-grid array (LGA) package. Prices start at $0.65 (1000-up, FOB USA). Evaluation kits are available for bench-level evaluation. Pricing for the EV kit is $50.00 (each, FOB USA). www.maxim-ic.com