RF bias control ICs come in tiny packages

Housed in 48-pin TQFN packages, the MAX1385/1386/11008 dual RF LDMOS bias controllers integrate all the functions needed in a PA signal chain to not only achieve 25 μV (‘85/86) or 50 μV (‘08) of resolution for self-calibration, but also produce 18-bit (‘85/86) or 12-bit (‘08) results for bias-voltage setting. These products are uniquely suited to bias the power-amplifier power transistors employed in CDMA, GSM, EDGE, and UMTS cellular base stations.

These ICs communicate over a 20-MHz SPI-compatible 4-wire serial interface or a pin-selectable 3.4-MHz I2 C-compatible serial interface and operate from a 4.75 to 5.25-V analog supply and a 2.7 to 5.25-V digital supply. All three bias controllers offer self-calibration modes. ($6.20 ea/1,000 — available now.)

Maxim Integrated Products , Sunnyvale , CA
Sales Office 888-629-4642

http://www.maxim-ic.com