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PDF AS5247 Data sheet ( Hoja de datos )
| Número de pieza | AS5247 | |
| Descripción | 14-bit Dual-die On-Axis Magnetic Rotary Position Sensor | |
| Fabricantes | ams | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AS5247 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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AS5247
14-bit Dual-die On-Axis Magnetic
Rotary Position Sensor with 11-bit
Binary Incremental Pulse Count
General Description
The AS5247 is a high-resolution redundant rotary position
sensor for fast absolute angle measurement over a full
360-degree range. This new position sensor is equipped with a
revolutionary integrated dynamic angle error compensation
(DAEC™) with almost 0 latency.
The robust design of the device suppresses the influence of any
homogenous external stray magnetic field. A standard 4-wire
SPI serial interface allows a host microcontroller to read 14-bit
absolute angle position data from the AS5247 and to program
non-volatile settings without a dedicated programmer.
Incremental movements are indicated on a set of ABI signals
with a maximum resolution of 2048 steps / 512 pulses per
revolution. The resolution of the ABI signal is programmable to
1024 steps / 256 pulses per revolution.
Brushless DC (BLDC) motors are controlled through a standard
UVW commutation interface with a programmable number of
pole pairs from 1 to 7. The absolute angle position is also
provided as PWM-encoded output signal
The AS5247 supports embedded self-diagnostics including
magnetic field strength too high, magnetic field strength too
low or lost magnet, and other related diagnostic features.
The product is defined as SEooC (Safety Element out of Context)
according ISO26262 including FMEDA, safety manual and third
party qualification.
The AS5247 is available as a dual die in a compact MLF-40 7x7
package.
Ordering Information and Content Guide appear at end of
datasheet.
Figure 1:
Added Value of Using the AS5247
Key Benefits & Features
The benefits and features of AS5247, 14-bit Dual-die On-Axis
Magnetic Rotary Position Sensor with 11-bit Binary Incremental
Pulse Count are listed below:
Benefits
Easy to use – saving costs on DSP
Good resolution for motor & position control
Features
DAEC™ Dynamic angle error compensation
14-bit core resolution
ams Datasheet: 2014-Jun-20 [v1-02]
AS5247 – 1
1 page  
Absolute Maximum Ratings
Absolute Maximum Ratings
Figure 5:
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum
Ratings“ may cause permanent damage to the device. These are
stress ratings only. Functional operation of the device at these
or any other conditions beyond those indicated under
“Operating Conditions” is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Parameter
DC supply voltage at VDD pin
DC supply voltage at VDD3V3 pin
DC supply voltage at GND pin
Input pin voltage
Input current (latch-up immunity)
Electrostatic discharge
Total power dissipation (all supplies
and outputs)
Ambient temperature 5V0
Ambient temperature 3V3
Programming Temperature
Storage temperature
Package body temperature
Humidity non-condensing
Moisture sensitivity level
Symbol Min Max
VDD5
VDD3
VSS
Vin
-0.3 7.0
-0.3 5.0
-0.3 0.3
VDD+0.3
Iscr -100 100
ESD ±2
Pt 150
Ta5V0
-40
150
Ta3V3
-40
150
TaProg
5
45
T_strg
T_body
-55
5
150
260
85
3
Units
Note
V
V
V
V
mA
Norm:
AEC-Q100-004
kV
Norm:
AEC-Q100-002
mW
°C
In the 5.0V power
supply mode only
In the 3.3V power
°C supply mode if
NOISESET=1
Programming @
°C Roomtemperature
(25°C ± 20°C)
°C
°C
Norm: IPC/JEDEC
J-STD-020
%
Represents a
maximum floor
lifetime of 168h
ams Datasheet: 2014-Jun-20 [v1-02]
AS5247 – 5
5 Page 
Detailed Description
Figure 12:
SPI Timing Diagram
SPI Interface (slave)
The SPI interface is used by a host microcontroller (master) to
read or write the volatile memory as well as to program the
non-volatile OTP registers. The AS5247 SPI only supports slave
operation mode. It communicates at clock rates up to 10 MHz.
The AS5247 SPI uses mode=1 (CPOL=0, CPHA=1) to exchange
data. As shown in Figure 12, a data transfer starts with the
falling edge of CSn (SCL is low). The AS5247 samples MOSI data
on the falling edge of SCL. SPI commands are executed at the
end of the frame (rising edge of CSn). The bit order is MSB first.
Data is protected by parity.
SPI Timing
The AS5247 SPI timing is shown in Figure 12.
CSn
(Input)
CLK
(Input)
MISO
(Output)
MOSI
(Input)
tL
tclk
tclkL
tclkH
tMISO
Data[15]
tMOSI
Data[15]
Data[14]
Data[14]
tCSn
tH
Data[0]
Data[0]
tOZ
tOZ
ams Datasheet: 2014-Jun-20 [v1-02]
AS5247 – 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AS5247.PDF ] | |
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