GENERAL DESCRIPTION

The AD2S1205 is a complete 12-bit resolution tracking resolver-to-digital converter that contains an on-board programmable sinusoidal oscillator providing sine wave excitation for resolvers.

The converter accepts 3.15 V p-p ± 27 input signals on the Sin and Cos inputs. A Type II tracking loop is employed to track the inputs and convert the input Sin and Cos information into a digital representation of the input angle and velocity. The maximum tracking rate is a function of the external clock frequency. The performance of the AD2S105 is specified across a frequency range of 8.192 MHz ± 25, allowing a maximum tracking rate of 1250 rps.

FEATURES

Complete monolithic resolver-to-digital converter (RDC)

Parallel and serial 12-bit data ports

System fault detection

±11 arc minutes of accuracy

Input signal range: 3.15 V p-p ± 27

Absolute position and velocity outputs

1250 rps maximum tracking rate, 12-bit resolution

Incremental encoder emulation (1024 pulses/rev)

Programmable sinusoidal oscillator on board

Single-supply operation (5.00 V ± 5)

−40°C to +125°C temperature rating

44-lead LQFP

4 kV ESD protection

Qualified for automotive applications

APPLICATIONS

Automotive motion sensing and control

Hybrid-electric vehicles

Electric power steering

Integrated starter generator/alternator

Industrial motor control

Process control