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ABSTRACT The TSC2000, TSC2200, TSC2300, and TSC2301 touch screen controllers all feature an 8-bit current-output DAC, which was intended for use as an LCD contrast adjustment. Some of the parametric limitaTIons on the DAC may make it seem that it would not be useful for some applicaTIons; this applicaTIon note shows some simple ways to overcome these apparent “limitaTIons.”
