AD2S80KD – ANALOG DEVICES

The AD2S80KD is a 14-bit monolithic resolver-to-digital converter manufactured by Analog Devices. Utilizing a tracking architecture, it provides continuous conversion of resolver signals into a digital representation of angular position and velocity. The “AD 91+” marking indicates a performance grade, suggesting enhanced accuracy or temperature stability compared to standard AD2S80 variants. The device accepts resolver inputs with a typical transformation ratio of 0.5 and requires an excitation frequency within a specified range, typically 2 kHz to 20 kHz. Digital outputs include a 14-bit parallel angle word, and a velocity output proportional to the rate of change of the input angle. The AD2S80KD requires both +5V and -15V power supplies for operation. Its primary application is in closed-loop servo systems, motor control, and precision angular measurement where robust and reliable position feedback is critical.