|
|
PDF AS5040 Data sheet ( Hoja de datos )
| Número de pieza | AS5040 | |
| Descripción | PROGRAMMABLE MAGNETIC ROTARY ENCODER | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AS5040 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
General Description
AS5040
10Bit 360º Programmable Magnetic
Rotary Encoder
The AS5040 is a contactless magnetic rotary encoder for
accurate angular measurement over a full turn of 360°. It is a
system-on-chip, combining integrated Hall elements, analog
front end and digital signal processing in a single device.
To measure the angle, only a simple two-pole magnet, rotating
over the center of the chip, is required. The magnet may be
placed above or below the IC.
The absolute angle measurement provides instant indication of
the magnet’s angular position with a resolution of 0.35° = 1024
positions per revolution. This digital data is available as a serial
bit stream and as a PWM signal.
Furthermore, a user-programmable incremental output is
available, making the chip suitable for replacement of various
optical encoders.
An internal voltage regulator allows the AS5040 to operate at
either 3.3 V or 5 V supplies.
Ordering Information and Content Guide appear at end of
datasheet.
Figure 1:
Typical Arrangement of AS5040 and Magnet
ams Datasheet
[v2-11] 2015-Nov-20
Page 1
Document Feedback
1 page  
AS5040 − Pin Assignment
Figure 6:
Pin Description SSOP16
Mode 1.x: Quadrature A/B Output
Represents the default quadrature A/B signal mode.
Mode 2.x: Step / Direction Output
Configures pin 3 to deliver up to 512 pulses (up to 1024 state
changes) per revolution. It is equivalent to the LSB (least
significant bit) of the absolute position value. Pin 4 provides the
information of the rotational direction.
Both modes (mode 1.x and mode 2.x) provide an index signal
(1 pulse/revolution) with an adjustable width of one LSB or
three LSB’s.
Mode 3.x: Brushless DC Motor Commutation Mode
In addition to the absolute encoder output over the SSI
interface, this mode provides commutation signals for
brushless DC motors with either one pole pair or two pole pair
rotors. The commutation signals are usually provided by 3
discrete Hall switches, which are no longer required, as the
AS5040 can fulfill two tasks in parallel: absolute encoder + BLDC
motor commutation.
In this mode, pin 12 provides the LSB output instead of the PWM
(Pulse-Width-Modulation) signal.
Pin 8 (Prog) is also used to program the different incremental
interface modes, the incremental resolution and the zero
position into the OTP.
This pin is also used as digital input to shift serial data through
the device in Daisy Chain configuration.
Pin 11 Chip Select (CSn; active low) selects a device within a
network of AS5040 encoders and initiates serial data transfer.
A logic high at CSn puts the data output pin (DO) to tri-state
and terminates serial data transfer. This pin is also used for
Alignment Mode and Programming the AS5040.
Pin 12 allows a single wire output of the 10-bit absolute position
value. The value is encoded into a pulse width modulated signal
with 1μs pulse width per step (1μs to 1024μs over a full turn).
By using an external low pass filter, the digital PWM signal is
converted into an analog voltage, allowing a direct
replacement of potentiometers.
Pin Symbol
1 MagINCn
2 MagDECn
Type
DO_OD
DO_OD
Description
Magnet Field Magnitude INCrease; active low, indicates a
distance reduction between the magnet and the device surface.
Magnet Field Magnitude DECrease; active low, indicates a
distance increase between the device and the magnet.
ams Datasheet
[v2-11] 2015-Nov-20
Page 5
Document Feedback
5 Page 
AS5040 − Electrical Characteristics
Figure 14:
Magnetic Input Specification
Magnetic Input Specification
Operating conditions: Tamb = -40°C to 125°C, VDD5V = 3.0V to
3.6V (3V operation) VDD5V = 4.5V to 5.5V (5V operation) unless
otherwise noted.
Two-pole cylindrical diametrically magnetized source:
Symbol Parameter
dmag Diameter
tmag Thickness
Bpk
Magnetic input
field amplitude
Boff Magnetic offset
Field non-linearity
fmag_abs
fmag_inc
Input frequency
(rotational speed
of magnet)
Disp
Displacement
radius
Chip placement
tolerance
Recommended
magnet material
and temperature
drift
Min Typ Max Unit
Note
46
2.5
mm Recommended magnet: Ø 6mm x
mm 2.5mm for cylindrical magnets
Required vertical component of the
45
75
mT
magnetic field strength on the die’s
surface, measured along a concentric
circle with a radius of 1.1mm
± 10 mT Constant magnetic stray field
5 % Including offset gradient
10
Hz
Absolute mode: 600 rpm @ readout of
1024 positions (see Figure 36)
500
0.25
0.485
Incremental mode: no missing pulses
Hz at rotational speeds of up to 30,000
rpm (see Figure 36)
Max. X-Y offset between defined IC
package center and magnet axis (see
mm Figure 41)
Max. X-Y offset between chip center
and magnet axis.
±0.23 5
mm
Placement tolerance of chip within IC
package (see Figure 43)
-0.12
-0.035
NdFeB (Neodymium Iron Boron)
%/K
SmCo (Samarium Cobalt)
ams Datasheet
[v2-11] 2015-Nov-20
Page 11
Document Feedback
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AS5040.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AS5040 | PROGRAMMABLE MAGNETIC ROTARY ENCODER | austriamicrosystems AG |
| AS5043 | MAGNETIC ANGLE ENCODER | austriamicrosystems AG |
| AS5045 | 12 BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER | austriamicrosystems AG |
| AS5045B | 12-Bit Programmable Magnetic Position Sensor |  ams |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |