Linear Technology Announces LT1993 Family of Amplifiers

Linear Technology Corp. (LTC, Milpitas, CA) announced its new LT1993 family of high-speed, fully differential amplifiers for driving high-resolution, high-speed ADCs. The LT1993 Series is suitable for use in wired and wireless communications, imaging systems and test and measurement equipment.

The LT1993 Series offers fixed-gain options of 2 (6 dB), 4 (12 dB) and 10 (20 dB); low harmonic distortion of -70 dBc; and a 12.3 dB noise figure at 70 MHz. The LT1993 works everywhere with minimal support circuitry. The internal gain eliminates a handful of external gain setting resistors that are commonly required with other differential amplifiers. The built-in, user-adjustable, low pass filter simplifies pre-ADC filtering. The adjustable-output, common-mode voltage allows direct interfacing with ADCs without the need for ac-coupling capacitors or transformers. The LT1993 can be dc-coupled in applications that have frequency ranges, including dc.

The LT1993-2 features fixed gain of 6 dB with 800 MHz, -3 dB bandwidth. The LT1993-4 has a 12 dB fixed-gain with bandwidth reaching 900 MHz. The LT1993-10 offers a high gain of 20 dB with 700 MHz bandwidth. All gain options are available for operation over the commercial and industrial temperature ranges. Offered in low-profile, 3 mm x 3 mm, QFN packages, pricing starts at $2.95 each in 1,000-piece quantities.