As applications engineers, we are constantly bombarded with a variety of  questions about  driving high-speed analog-to-digital  converters (ADCs) with differential inputs. Indeed, selecting the right ADC driver and configuration can be challenging.  To make the design of robust ADC circuits somewhat easier, we’ve compiled a set of common “road hazards” and solutions. In this article, the circuit that actually drives the ADC—variously known as an ADC driver, differential amplifier, or diff amp—is assumed to be capable of handling high-speed signals.