|
|
PDF AS5311 Data sheet ( Hoja de datos )
| Número de pieza | AS5311 | |
| Descripción | High Resolution Magnetic Linear Encoder | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AS5311 (archivo pdf) en la parte inferior de esta página. Total 23 Páginas | ||
|
No Preview Available !
AS5311
Data Sheet
www.DataSheet4U.com
AS5311
High Resolution Magnetic Linear Encoder
Preliminary Data Sheet
1 General Description
The AS5311 is a contactless high resolution magnetic
linear encoder for accurate linear motion and off-axis
rotary sensing with a resolution down to <0.5µm. It is
a system-on-chip, combining integrated Hall elements,
analog front end and digital signal processing on a
single chip, packaged in a small 20-pin TSSOP
package.
A multi-pole magnetic strip or ring with a pole length
of 1.0mm is required to sense the rotational or linear
motion. The magnetic strip is placed above the IC at a
distance of typ. 0.3mm.
The absolute measurement provides instant indication
of the magnet position within one pole pair with a
resolution of 488nm per step (12-bit over 2.0mm).
This digital data is available as a serial bit stream and
as a PWM signal.
Furthermore, an incremental output is available with a
resolution of 1.95 µm per step. An index pulse is
generated once for every pole pair (once per
2.0mm).The travelling speed in incremental mode is
up to 650mm/second.
An internal voltage regulator allows the AS5311 to
operate at either 3.3 V or 5 V supplies.
Depending on the application the AS5311 accepts
multi-pole strip magnets as well as multi-pole ring
magnets, both radial and axial magnetized (see
Figure 1 and Figure 3).
The AS5311 is available in a Pb-free TSSOP-20
package and qualified for an ambient temperature
range from -40°C to +125°C.
2 Key Features
Two 12-bit digital absolute outputs :
- Serial interface and
- Pulse width modulated (PWM) output
Incremental output with Index
“red-yellow-green” indicators monitor magnet
placement over the chip
3 Applications
Micro-Actuator feedback
Servo drive feedback
Robotics
Replacement of optical encoders
Figure 1: AS5311 with Multi-pole Magnetic Strip
for Linear Motion Sensing
VDD5V
Figure 2: Block Diagram of AS5311
VDD3V3
Sin Ang
Cos Mag
MagINCn
MagDECn
PWM
DO
CSn
CLK
AS5311
A
B
Index
Prog
www.austriamicrosystems.com
Revision 1.01
1 - 23
1 page  
AS5311
Data Sheet
5 Pinout
5.1 Pin Assignments
Figure 4: AS5311 Pin Configuration, TSSOP-20
NC
MagIncn
MagDecn
A
B
NC
Index
VSS
Prog
NC
1
2
3
4
5
6
7
8
9
10
www.DataSheet4U.com
20 NC
19 VDD5V
18 VDD3V3
17 NC
16 NC
15 PWM
14 CSn
13 CLK
12 DO
11 NC
5.2 Pin Description
Pin 4(A), 5(B) and 7(Index) are the incremental outputs. The incremental output has a resolution of 10-bit per
pole pair, resulting in a step length of 1.95µm.
Note that Pin 14 (CSn) must be low to enable the incremental outputs.
Pins 12, 13 and 14 are used for serial data transfer. Chip Select (CSn; active low) initiates serial data transfer.
CLK is the clock input and DO is the data output. A logic high at CSn puts the data output pin (DO) to tri-state
and terminates serial data transfer. CSn must be low to enable the incremental outputs. See 7.1.1 for further
options.
Pin 8 is the supply ground pin. Pins 18 and 19 are the positive supply pins.
For 5V operation, connect the 5V supply to pin 19 and add a 2µ2…10µF buffer capacitor at pin 19.
For 3.3V operation, connect both pins 18 and 19 to the 3.3V supply.
Pin 9 is used for factory programming only. It should be connected to VSS.
Pins 2 and 3 are the magnetic field change indicators, MagINCn and MagDECn (magnetic field strength increase
or decrease through variation of the distance between the magnet and the device). These outputs can be used
to detect the valid magnetic field range.
External pull-up resistors are required at these pins. See 6.3.2 for maximum output currents on these pins. Since
they are open-drain outputs they can also be combined (wired-and).
Pin 15 (PWM) allows a single wire output of the 12-bit absolute position value within one pole pair (2.0mm). The
value is encoded into a pulse width modulated signal with 1µs pulse width per step (1µs to 4097µs over one pole
pair).
Pins 6, 10, 11, 16, 17 and 20 are for internal use and must not be connected.
www.austriamicrosystems.com
Revision 1.01
5 - 23
5 Page 
AS5311
Data Sheet
www.DataSheet4U.com
7.1 Incremental Outputs
Figure 6 shows the two-channel quadrature output of the AS5311. Output A leads output B when the magnet is
moving from right to left and output B leads output A when the magnet is moving from left to right
(see Figure 14).
Figure 6: Incremental Outputs
Incremental outputs
A
M e c h a nic a l
Z ero P osition
Movement Direction
M echanical
Zero Position
Change
B
Index
CSn
Index= 0
1 LSB
Movem ent right to left
Hyst =
2 LSB
Movement left to right
t In cre m e n tal o u tp u ts va lid
7.1.1 Incremental Power-up Lock Option
After power-up, the incremental outputs can optionally be locked or unlocked, depending on the status of the
CSn pin:
CSn = low at power-up:
CSn has an internal pull-up resistor and must be externally pulled low (Rext ≤ 5kΩ). If Csn is low at
power-up, the incremental outputs A, B and Index will be high until the internal offset compensation is
finished.
This unique state may be used as an indicator for the external controller to shorten the waiting time at
power-up. Instead of waiting for the specified maximum power up-time (see 6.5), the controller can start
requesting data from the AS5311 as soon as the state (A=B=Index = high) is cleared.
CSn = high or open at power-up:
In this mode, the incremental outputs (A, B, Index) will remain at logic high state, until CSn goes low or
a low pulse is applied at CSn. This mode allows intentional disabling of the incremental outputs until for
example the system microcontroller is ready to receive data.
www.austriamicrosystems.com
Revision 1.01
11 - 23
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet AS5311.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AS5311 | High Resolution Magnetic Linear Encoder | austriamicrosystems AG |
| AS5311 | High Resolution Magnetic Linear Encoder |  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 |