The LMH6881 is a high-speed, high-performance, programmable differential amplifier. With
a bandwidth of 2.4 GHz and high linearity of 44 dBm OIP3, the LMH6881 is suitable for a wide
variety of signal conditioning applications.
The LMH6881 programmable differential amplifier combines the best of both fully
differential amplifiers and variable-gain amplifiers. The device offers superior noise and
distortion performance over the entire gain range without external resistors, enabling the use of
just one device and one design for multiple applications requiring different gain settings.
The LMH6881 is an easy-to-use amplifier that can replace both fully differential,
fixed-gain amplifiers as well as variable-gain amplifiers. The LMH6881 requires no external
gain-setting components and supports gain settings from 6 dB to 26 dB with small, accurate 0.25-dB
gain steps. With an input impedance of 100 Ω, the LMH6881 is easy to drive from a variety of
sources such as mixers or filters. The LMH6881 also supports 50-Ω single-ended signal sources and
supports both DC- and AC-coupled applications.
Parallel gain control allows the LMH6881 to be soldered down in a fixed-gain so that no
control circuit is required. If dynamic-gain control is desired, the LMH6881 can be changed with
SPI™ serial commands or with the parallel pins.
The LMH6881 is fabricated in TIs CBiCMOS8 proprietary complementary silicon germanium
process and is available in a space-saving, thermally enhanced 24-pin lead quad WQFN package. The
same amplifier is offered in a dual package as the LMH6882.