Programmable differential amplifiers are world’s first

Programmable differential amplifiers are world’s first

Claimed as the industry’s first programmable differential amplifiers (PDAs), the 2.4-GHz single-channel LMH6881 and the 2.4-GHz dual-channel LMH6882 provide optimized noise, distortion and bandwidth performance over a 6- to 26-dB gain range, simplifying the way engineers design with differential amplifiers. Specifications at maximum gain of 26 dB and 100-MHz input frequency are: 9.7-dB noise figure, 44-dBm OIP3, and –100 dBc HD3. The parts are suited for medical, T&M, wireless communications, and microwave backhaul applications.

They support dc/ac coupling and single-ended-to-differential conversion which eliminates the need for a balun, giving designers the flexibility to operate from dc to high frequencies with minimal external components. Gain control can be implemented via SPI bus or dedicated pins, with no external resistors needed.

In addition, the LMH6882’s channel gain matching of 0.2 dB and phase matching of 1.5 degrees provide excellent image rejection for wideband zero IF and I/Q sampling applications. The LMH6881 is available in a 24-pin QFN package and the LMH6882 in a 36-pin QFN package.(ea/1,000; LMH6882, $3.71; LMH6881, $5.95 — available now)

By Christina Nickolas

Texas Instruments , Dallas , TX
Information 800-477-8924
www.ti.com