Generating a ±10.24V true bipolar input for an 18-bit, 1Msps SAR ADC
Guy Hoover
Abstract
The LT1937, a white LED driver optimized for driving two to four LEDs from a Li-Ion battery input, is described.
Keywords
White LED driver
LT1937
Introduction
The LTC2338 is an 18-bit fully differential SAR ADC that is remarkably easy to drive. This 1Msps ADC operates from a single 5V supply and achieves ±4LSB INL maximum with −111dB THD and 100dB SNR. Its fully differential ±20.48V true bipolar input range minimizes the need for range scaling, and its 2kΩ resistive input greatly reduces the charge kickback from the internal sampling capacitor.
ADCs claiming similar performance require scaling to exceed what is typically a 0V to V ...
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