|
|
PDF AS5145B Data sheet ( Hoja de datos )
| Número de pieza | AS5145B | |
| Descripción | 12-Bit Programmable Magnetic Rotary Encoder | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AS5145B (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
Data Sheet
AS5145/AS5145A/AS5145B
12-Bit Programmable Magnetic Rotary Encoder
www.DataSheet4U.com
1 General Description
The AS5145 is a contact less magnetic rotary encoder for accurate
angular measurement over a full turn of 360 degrees.
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 0.0879º = 4096
positions per revolution. This digital data is available as a serial bit
stream and as a PWM signal.
An internal voltage regulator allows the AS5145 to operate at either
3.3V or 5V supplies.
2 Key Features
Contact less high resolution rotational position encoding over a
full turn of 360 degrees
Two digital 12 bit absolute outputs:
- Serial interface
- Pulse width modulated (PWM) output
Three incremental outputs
Quadrature A/B (10 or 12 bit) and Index output signal (pre-
programmed versions available AS5145A for 10 bit and
AS5145B for 12 bit)
User programmable zero position
Failure detection mode for magnet placement, monitoring, and
loss of power supply
Red-Yellow-Green indicators display placement of magnet in Z-
axis
Serial read-out of multiple interconnected AS5145 devices
using Daisy Chain mode
Tolerant to magnet misalignment and gap variations
Wide temperature range: - 40ºC to +150ºC
Fully automotive qualified to AEC-Q100, grade 0
Small Pb-free package: SSOP 16 (5.3mm x 6.2mm)
3 Applications
The device is ideal for industrial applications like contactless rotary
position sensing and robotics; automotive applications like steering
wheel position sensing, transmission gearbox encoder, head light
position control, torque sensing, valve position sensing and
replacement of high end potentiometers.
Figure 1. AS5145 Automotive Rotary Encoder IC
VDD5V
Mode_Index
VDD3V3
LDO 3.3V
Hall Array
&
Front end
Amplifier
Sin
Cos
Mux
Ang
DSP
Mag
OTP
Register
AS5145
PWM
Interface
Absolute
Interface
(SSI)
Incremental
Interface
MagINCn
MagDECn
PWM
DO
CSn
CLK
PDIO
DTEST1_A
DTEST2_B
www.austriamicrosystems.com/AS5145
Revision 1.10
1 - 36
1 page  
AS5145
Data Sheet - Pin Assignments
www.DataSheet4U.com
Table 1. Pin Descriptions
Pin Number
14
15
16
Pin Name
NC
VDD3V3
VDD5V
Description
Must be left unconnected
3V-Regulator Output, internally regulated from VDD5V. Connect to VDD5V for 3V supply
voltage. Do not load externally.
Positive Supply Voltage, 3.0 to 5.5 V
Pin 1 and 2 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. Furthermore those
indicators can also be used for contact-less push-button functionality.
Pin 3 and 4 are multi function pins for sync mode, sin/cosine mode and incremental mode.
Pin 6 Mode_Index allows switching between filtered (slow) and unfiltered (fast mode). In incremental mode, the pin changes from input to output
and provides the index pulse information. A change of the Mode during operation is not allowed. The setup must be constant during power up
and during operation.
Pins 7, 15, and 16 are supply pins, pins 5, 13, and 14 are for internal use and must not be connected.
Pin 8 (PDIO) is used to program the zero-position into the OTP(see page 19). This pin is also used as digital input to shift serial data through the
device in Daisy Chain configuration, (see page 14).
Pin 11 Chip Select (CSn; active low) selects a device within a network of AS5145 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 (see Alignment Mode on
page 23) and programming mode (see Programming the AS5145 on page 19).
Pin 12 allows a single wire output of the 12-bit absolute position value. The value is encoded into a pulse width modulated signal with 1µs pulse
width per step (1µs to 4096µs over a full turn). By using an external low pass filter, the digital PWM signal is converted into an analog voltage,
e.g. for making a direct replacement of potentiometers possible.
www.austriamicrosystems.com/AS5145
Revision 1.10
5 - 36
5 Page 
AS5145
Data Sheet - Timing Characteristics
www.DataSheet4U.com
7 Timing Characteristics
TAMB = -40 to +150 ºC, VDD5V = 3.0 to 3.6V (3V operation) VDD5V = 4.5 to 5.5V (5V operation), unless otherwise noted.
Table 6. Timing Characteristics
Symbol
Parameter
Synchronous Serial Interface (SSI)
Conditions
Min Typ
tDOactive
Data output activated (logic high)
Time between falling edge of CSn and
data output activated
tCLKFE
First data shifted to output register
Time between falling edge of CSn and
first falling edge of CLK
500
TCLK/2
Start of data output
Rising edge of CLK shifts out one bit at a
time
500
tDOvalid
Data output valid
Time between rising edge of CLK and
data output valid
tDOtristate
Data output tri-state
After the last bit DO changes back to “tri-
state”
tCSn
Pulse width of CSn
CSn =high; To initiate read-out of next
angular position
500
fCLK Read-out frequency
Pulse Width Modulation Output
Clock frequency to read out serial data >0
fPWM PWM frequency
PWMIN
Minimum pulse width
PWMAX
Maximum pulse width
Programming Conditions
Signal period = 4098µs ±10% at TAMB
= -40 to +150ºC
Position 0d; angle 0 degree
Position 4098d; angle 359.91 degrees
220
0.90
3686
224
1
4096
tPROG
tCHARGE
fLOAD
fREAD
fWRITE
Programming time per bit
Refresh time per bit
LOAD frequency
READ frequency
WRITE frequency
Time to prog. a singe fuse bit
Time to charge the cap after tPROG
Data can be loaded at n x 2µs
Read the data from the latch
Write the data to the latch
10
1
Max
100
413
100
1
268
1.10
4506
20
500
2.5
2.5
Units
ns
ns
ns
ns
ns
ns
MHz
Hz
µs
µs
µs
µs
kHz
MHz
MHz
www.austriamicrosystems.com/AS5145
Revision 1.10
11 - 36
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AS5145B.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AS5145 | 12-Bit Programmable Magnetic Rotary Encoder | austriamicrosystems AG |
| AS5145A | 12-Bit Programmable Magnetic Rotary Encoder | austriamicrosystems AG |
| AS5145A | 12-Bit Programmable Magnetic Rotary Encoder |  ams |
| AS5145B | 12-Bit Programmable Magnetic Rotary Encoder | austriamicrosystems AG |
| 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 |