AD2S1210SST-EP-RL7 Datasheet, PDF (1/16 Pages) Analog Devices – Variable Resolution, 10-Bit to 16-Bit R/D Converter with Reference Oscillator

Variable Resolution, 10-Bit to 16-Bit R/D
Converter with Reference Oscillator
AD2S1210-EP
FEATURES
Complete monolithic resolver-to-digital converter
3125 rps maximum tracking rate (10-bit resolution)
±2.5 arc minutes of accuracy
10-/12-/14-/16-bit resolution, set by user
Parallel and serial 10-bit to 16-bit data ports
Absolute position and velocity outputs
System fault detection
Programmable fault detection thresholds
Differential inputs
Incremental encoder emulation
Programmable sinusoidal oscillator on board
Compatible with DSP and SPI interface standards
5 V supply with 2.3 V to 5 V logic interface
Support defense and aerospace applications (AQEC)
Military temperature range ( −55°C to +125°C)
Controlled manufacturing baseline
One assembly/test site
One fabrication site
Enhanced product change notification
Qualification data available upon request
APPLICATIONS
DC and ac servo motor control
Encoder emulation
Electric power steering
Electric vehicles
Integrated starter generators/alternators
Automotive motion sensing and control
GENERAL DESCRIPTION
The AD2S1210-EP is a complete 10-bit to 16-bit resolution
tracking resolver-to-digital converter, integrating an on-board
programmable sinusoidal oscillator that provides sine wave
excitation for resolvers.
The converter accepts 3.15 V p-p ± 27% input signals, in the range
of 2 kHz to 20 kHz on the sine and cosine inputs. A Type II
servo loop is employed to track the inputs and convert the input
sine and cosine information into a digital representation of the
input angle and velocity. The maximum tracking rate is 3125 rps.
Full details about this enhanced product, including theory of
operation, registers details, and applications information, are
available in the AD2S1210 data sheet, which should be
concluded in conjunction with this data sheet.
FUNCTIONAL BLOCK DIAGRAM
REFERENCE
PINS
CRYSTAL
EXCITATION
OUTPUTS
REFERENCE
OSCILLATOR
(DAC)
VOLTAGE
REFERENCE
INTERNAL
CLOCK
GENERATOR
SYNTHETIC
REFERENCE
AD2S1210-EP
INPUTS
FROM
RESOLVER
ADC
ADC
TYPE II
TRACKING LOOP
FAULT
DETECTION
FAULT
DETECTION
OUTPUTS
ENCODER
EMULATION
OUTPUTS
POSITION VELOCITY _{CONFIGURATION}
REGISTER REGISTER
REGISTER
DATA I/O
MULTIPLEXER
DATA BUS OUTPUT
RESET
DATA I/O
Figure 1.
PRODUCT HIGHLIGHTS
1. 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.
2. 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. The fault
detection threshold levels can be individually programmed
by the user for optimization within a particular application.
3. Input signal range. The sine and cosine inputs can accept
differential input voltages of 3.15 V p-p ± 27%.
4. Programmable excitation frequency. Excitation frequency
is easily programmable to a number of standard frequencies
between 2 kHz and 20 kHz.
5. Triple format position data. Absolute 10-bit to 16-bit angular
position data is accessed via either a 16-bit parallel port or a
4-wire serial interface. Incremental encoder emulation is in
standard A-quad-B format with direction output available.
6. Digital velocity output. 10-bit to 16-bit signed digital
velocity accessed via either a 16-bit parallel port or a 4-wire
serial interface.
Rev. 0
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