Linear Technology Corp. (LTC, Milpitas, CA) introduced its LT1991 and LT1995 high-speed, gain-selectable amplifiers, which include precision resistors on-board, resulting in a one-chip solution that can be easily configured into various gain circuits by pin-strapping the device. Users can configure the LT1991 and LT1995 as difference, summing, inverting or non-inverting amplifiers with various gain options without using any external components. The amplifiers are suitable in communications and optical networking equipment, semiconductor fab equipment, and medical imaging systems.
The LT1991 combines a micropower operational amplifier with eight resistors to form a single-chip solution for amplifying voltages with better than 0.04% gain accuracy. The amplifier offers dc characteristics with an input offset voltage of less than 50 µV, an input offset current of 50 pA, a low offset voltage drift of 1 µV/°C, a gain drift below 3 ppm/°C, a rail-to-rail output, operation from 2.7 V to 36 V, and consumption of less than 110 µA on a single 5 V supply.
Offered in the 10-lead MSOP package, the LT1991 and LT1995 are specified for operation over the commercial and industrial temperature ranges. Pricing for 1,000-piece quantities starts at $1.39 each for the LT1991 amplifier and $1.89 each for the LT1995 amplifier.
