A New Class of Amplifier,Programmable Differential Amplifiers

摘要

Texas Instruments recently introduced a new class of amplifier, the programmable differential amplifier (PDA), combining the best of fully differential amplifiers (FDA) and digital variable gain amplifiers (DVGA). Designing with high speed operational amplifiers (op amps) is often challenging. Simultaneously achieving high levels of performance across multiple specification requirements such as bandwidth, noise, distortion and impedance can be tricky. Anyone who has had an "op-amp afterthought" design experience will vouch for how tedious it can be to redesign and optimize the signal chain for a different gain value. The 2.4 GHz LMH6881 single-channel PDA and 2.4 GHz LMH6882 dual-channel PDA enable flexible and effortless signal chain design, allowing engineers to use one chip and one design for a broad range of applications.