AD2S1210 Datasheet PDF - Analog Devices
| Part Number | AD2S1210 | |
| Description | 10-Bit to 16-Bit R/D Converter | |
| Manufacturers | Analog Devices | |
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Variable Resolution, 10-Bit to 16-Bit R/D
Converter with Reference Oscillator
AD2S1210
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
−40°C to +125°C temperature rating
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 is a complete 10-bit to 16-bit resolution tracking
resolver-to-digital converter, integrating an on-board program-
mable 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.
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
FUNCTIONAL BLOCK DIAGRAM
REFERENCE
PINS
CRYSTAL
EXCITATION
OUTPUTS
REFERENCE
OSCILLATOR
(DAC)
VOLTAGE
REFERENCE
INTERNAL
CLOCK
GENERATOR
SYNTHETIC
REFERENCE
AD2S1210
INPUTS
FROM
RESOLVER
ADC
ADC
TYPE II
TRACKING LOOP
FAULT
DETECTION
FAULT
DETECTION
OUTPUTS
ENCODER
EMULATION
OUTPUTS
POSITION VELOCITY
REGISTER REGISTER
CONFIGURATION
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2008–2010 Analog Devices, Inc. All rights reserved.
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AD2S1210
Parameter
POWER REQUIREMENTS
AVDD
DVDD
VDRIVE
POWER SUPPLY
IAVDD
IDVDD
IOVDD
Min Typ
4.75
4.75
2.3
Max Unit Conditions/Comments
5.25 V
5.25 V
5.25 V
12 mA
35 mA
2 mA
1 Temperature ranges are as follows: A, B grades: –40°C to +85°C; C, D grades: –40°C to +125°C.
2 The voltages, SIN, SINLO, COS, and COSLO, relative to AGND, must always be between 0.15 V and AVDD − 0.2 V.
3 All specifications within the angular accuracy parameter are tested at constant velocity, that is, zero acceleration.
4 The velocity accuracy specification includes velocity offset and dynamic ripple.
5 For example when RES0 = 0 and RES1 = 1, the position output has a resolution of 12 bits. The velocity output has a resolution of 11 bits with the MSB indicating the
direction of rotation. In this example, with a CLKIN frequency of 8.192 MHz the velocity LSB is 0.488 rps, that is, 1000 rps/(211).
6 The clock frequency of the AD2S1210 can be supplied with a crystal, an oscillator, or directly from a DSP/microprocessor digital output. When using a single-ended
clock signal directly from the DSP/microprocessor, the XTALOUT pin should remain open circuit and the logic levels outlined under the logic inputs parameter in Table 1 apply.
Rev. A | Page 5 of 36
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| Information | Total 30 Pages | |
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| Download | [ AD2S1210.PDF Datasheet ] | |
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