|
|
PDF AS5045 Data sheet ( Hoja de datos )
| Número de pieza | AS5045 | |
| Descripción | 12 BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AS5045 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
AS5045
12 Bit Programmable Magnetic Rotary Encoder
Data Sheet
1 General Description
The AS5045 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 0.0879° = 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 AS5045 to
operate at either 3.3 V or 5 V supplies.
2 Benefits
Complete system-on-chip
Flexible system solution provides absolute and
PWM outputs simultaneously
Ideal for applications in harsh environments due to
contactless position sensing
No calibration required
3 Key Features
Contactless high resolution rotational position
encoding over a full turn of 360 degrees
Two digital 12bit absolute outputs:
- Serial interface and
- Pulse width modulated (PWM) output
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 AS5045
devices using Daisy Chain mode
Tolerant to magnet misalignment and airgap
variations
Wide temperature range: - 40°C to + 125°C
Small Pb-free package: SSOP 16 (5.3mm x 6.2mm)
4 Applications
Industrial applications:
- Contactless rotary position sensing
- Robotics
Automotive applications:
- Steering wheel position sensing
- Transmission gearbox encoder
- Headlight position control
- Torque sensing
- Valve position sensing
Replacement of high end potentiometers
Figure 1. Typical Arrangement of AS5045 and Magnet
www.austriamicrosystems.com
Revision 1.7
1 – 33
1 page  
AS5045
Data Sheet
Pin Symbol
Type
Description
5 NC
-
Must be left unconnected
6 Mode
-
Select between slow (low, VSS) and fast (high, VDD5V) mode. Internal pull-down
resistor.
7 VSS
S
Negative Supply Voltage (GND)
8
Prog_DI
DI_PD
OTP Programming Input and Data Input for Daisy Chain mode. Internal pull-
down resistor (~74kΩ). Connect to VSS if not used
9 DO
DO_T
Data Output of Synchronous Serial Interface
10 CLK
DI, ST
Clock Input of Synchronous Serial Interface; Schmitt-Trigger input
11 CSn
DI_PU, ST Chip Select, active low; Schmitt-Trigger input, internal pull-up resistor (~50kΩ)
12 PWM
DO
Pulse Width Modulation of approx. 244Hz; 1µs/step (opt. 122Hz; 2µs/step)
13 NC
-
Must be left unconnected
14 NC
-
Must be left unconnected
15 VDD3V3 S
3V-Regulator Output, internally regulated from VDD5V. Connect to VDD5V for
3V supply voltage. Do not load externally.
16 VDD5V
S
Positive Supply Voltage, 3.0 to 5.5 V
DO_OD
DO
DI_PD
DI_PU
digital output open drain
digital output
digital input pull-down
digital input pull-up
S
DI
DO_T
ST
supply pin
digital input
digital output /tri-state
Schmitt-Trigger input
6 Electrical Characteristics
6.1 AS5045 Differences to AS5040
All parameters are according to AS5040 datasheet except for the parameters shown below:
Building Block
AS5045
AS5040
Resolution
12bits, 0.088°/step.
10bit, 0.35°/step
Data length
Read: 18bits
(12bits data + 6 bits status)
OTP write: 18 bits
(12bits zero position + 6 bits mode selection)
Read: 16bits
(10bits data + 6 bits status)
OTP write: 16 bits
(10bits zero position + 6 bits mode selection)
Incremental
encoder
Not used
Pin 3: not used
Pin 4:not used
Quadrature, step/direction and BLDC motor
commutation modes
Pin 3:incremental output A_LSB_U
Pin 4:incremental output B_DIR_V
Pins 1 and 2
MagINCn, MagDECn: same feature as
AS5040, additional OTP option for red-
yellow-green magnetic range
MagINCn, MagDECn indicate in-range or
out-of-range magnetic field plus movement
of magnet in z-axis
Pin 6
MODE pin, switch between fast and slow
mode
Pin 6:Index output
Pin 12
PWM output: frequency selectable by OTP:
1µs / step, 4096 steps per revolution,
f=244Hz 2µs/ step, 4096 steps per
revolution, f=122Hz
PWM output:
1µs / step, 1024 steps per revolution,
976Hz PWM frequency
Sampling
frequency
Selectable by MODE input pin:
2.5kHz, 10kHz
Fixed at 10kHz @10bit resolution
www.austriamicrosystems.com
Revision 1.7
5 – 33
5 Page 
AS5045
Data Sheet
6.7.2 Pulse Width Modulation Output
(operating conditions: Tamb = -40 to +125°C, VDD5V = 3.0~3.6V (3V operation) VDD5V = 4.5~5.5V (5V operation)
unless otherwise noted)
Parameter
Symbol Min Typ Max Unit Note
PWM frequency
f PWM
232 244 256
220 244 268
Hz Signal period = 4097µs ±5% at Tamb = 25°C
= 4097µs ±10% at Tamb = -40 to +125°C
Minimum pulse width
PW MIN
0.95
1
1.05 µs Position 0d; Angle 0°
Maximum pulse width
PW MAX 3891 4096 4301 µs Position 4095d; Angle 359.91°
Note: when OTP bit “PWMhalfEn” is set, the PWM pulse width PW is doubled (PWM frequency fPWM is divided by 2)
6.8 Programming Conditions
(operating conditions: Tamb = -40 to +125°C, VDD5V = 3.0~3.6V (3V operation) VDD5V = 4.5~5.5V (5V operation)
unless otherwise noted)
Parameter
Symbol Min Typ Max Unit Note
Programming enable time
t Prog enable
2
µs
Time between rising edge at
Prog pin and rising edge of CSn
Write data start
t Data in
2
µs
Write data valid
t Data in valid
250
ns
Write data at the rising edge of
CLK PROG
Load programming data
t Load PROG
3
µs
Rise time of VPROG before
CLKPROG
t PrgR
0
µs
Hold time of VPROG after
CLKPROG
t PrgH
0
5 µs
Write data – programming
CLKPROG
CLK PROG
250
kHz
Ensure that VPROG is stable with
rising edge of CLK
CLK pulse width
t PROG
1.8
2
2.2
µs
During programming; 16 clock
cycles
Hold time of Vprog after
programming
t PROG finished
2
µs
Programmed data is available
after next power-on
Programming voltage, pin
PROG
V PROG
7.3
7.4
7.5
V
Must be switched off after
zapping
Programming voltage off level
V ProgOff
0
1
V
Line must be discharged to this
level
Programming current
I PROG
130 mA During programming
Analog read CLK
Programmed Zener voltage
(log.1)
Unprogrammed Zener voltage
(log. 0)
CLKAread
Vprogrammed
Vunprogrammed
1
100 kHz Analog Readback mode
100 mV VRef-VPROG during Analog
Readback mode (see 11.4)
V
www.austriamicrosystems.com
Revision 1.7
11 – 33
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AS5045.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 |