Choosing either a fully-differential ADC or a pseudo-differential ADC depends on the accuracy required and on the signal conditioning circuitry of the application. In most applications, an amplifier level-shifts, scales, filters, and drives the input signal into the ADC. The figure on this slide shows how a single-ended 0V to V_REF input signal is driven into the LTC2369 pseudo-differential ADC vs. the LTC2379 fully-differential ADC. Since these ADCs require such low power to begin with, much of the power of the signal chain solution will be in the ADC driver. There are two straightforward ways to decrease power consumption in the driving stage; limiting the circuit complexity of the amplifier and reducing the required supply voltage. Traditional single-ended to differential ADC drivers like the LT6350 (shown in the lower circuit), have a split ±VCC supply, two internal amplifiers and other discrete circuitry to drive the fully differential inputs of the LTC2379. The LT6202, driving the single-ended input of the LTC2369 (shown in the upper circuit), also has a split ±VCC supply but only one internal amplifier. The reduced number of amplifiers in the driver for the pseudo-differential ADC reduces the cost and complexity of the input driver and consumes less power (30mW vs. 54mW) than a fully differential ADC driver.