the following example is for you reference.
(ADI New and Original)
12-Bit R/D Converter with Reference Oscillator
- 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
|lead package||44-lead LQFP|
|temperature rating||−40°C to +125°C|
|Single-supply operation||5.00 V ± 5%|
|Input signal range||3.15 V p-p ± 27%|
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
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.
- Ratiometric Tracking Conversion. The Type II tracking loop provides
continuous output position data without conversion delay. It also
provides noise immunity and tolerance of harmonic distortion on the
reference and input signals.
- System Fault Detection. A fault detection circuit can sense loss of
resolver signals, out-of-range input signals, input signal
mismatch, or loss of position tracking.
- Input Signal Range. The Sin and Cos inputs can accept differential
input voltages of 3.15 V p-p ± 27%.
- Programmable Excitation Frequency. Excitation frequency is easily
programmable to 10 kHz, 12 kHz, 15 kHz, or 20 kHz by using the
frequency select pins (the FS1 and FS2 pins).
- Triple Format Position Data. Absolute 12-bit angular position data
is accessed via either a 12-bit parallel port or a 3-wire serial
interface. Incremental encoder emulation is in standard A-quad-B
format with direction output available.
- Digital Velocity Output. 12-bit signed digital velocity accessed
via either a 12-bit parallel port or a 3-wire serial interface.
- Automotive motion sensing and control
- Hybrid-electric vehicles
- Electric power steering
- Integrated starter generator/alternator
- Industrial motor control
- Process control