Tiny amps require no external components

26 January 2005 Analogue, Mixed Signal, LSI

Unlike traditional amplifier solutions that require external resistors to set the gain, Linear Technology's LT1991 precision and LT1995 high-speed gain selectable amplifiers in 10-lead MSOP packages include precision resistors on-board. This results in a one-chip solution that can be easily configured into various gain circuits by simply pin-strapping the device. They can be configured as difference, summing, inverting or non-inverting amplifiers with various gain options without using any external components. The LT1991 claims better than 0,04% gain accuracy, input offset voltage of less than 50 μV, input offset current of 50 pA, offset voltage drift of 1 μV/°C. It operates 2,7 V to 36 V. The LT1995 claims fast slewing characteristics of 1000 V/μs, and fast settling time, 100 ns to 0,1%. It operates from ±2,5 V to ±15 V.

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