AD2S1200WSTZ

The AD2S1200WSTZ is a complete monolithic 12-bit resolution tracking resolver-to-digital converter (RDC) from Analog Devices. It integrates an on-board programmable sinusoidal oscillator to provide sine wave excitation for resolvers. The converter accepts 3.6 V p-p ±10% input signals in the range of 10 kHz to 20 kHz on the Sin and Cos inputs. A Type II servo loop tracks the inputs and converts the Sin and Cos information into a digital representation of the input angle and velocity. The bandwidth is internally set to 1.7 kHz with an external 8.192 MHz crystal.

Key specifications include ±11 arc minutes accuracy, 1000 rps maximum tracking rate at 12-bit resolution, and system fault detection. The device supports both parallel and 3-wire SPI serial interfaces, and provides absolute position and velocity outputs. It also features incremental encoder emulation (1024 pulses/rev) and a 204.8 kHz square wave output.

The AD2S1200WSTZ operates from a single 5V supply (4.75V to 5.25V) and consumes a maximum of 18 mA supply current with 50 mW power dissipation. It is rated for automotive applications with an operating temperature range of -40°C to 125°C. The device is packaged in a 44-lead LQFP (10mm x 10mm x 1.45mm) with matte tin contact plating and SMD/SMT termination, suitable for surface mount assembly.