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PDF AS5043 Data sheet ( Hoja de datos )
| Número de pieza | AS5043 | |
| Descripción | MAGNETIC ANGLE ENCODER | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AS5043 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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AS5043
Data Sheet - Pin Configuration
AS5043
Programmable 360° Magnetic Angle Encoder
with Absolute SSI and Analog Outputs
Data Sheet
1 General Description
The AS5043 is a contactless magnetic angle encoder for
accurate measurement up to 360°.
It is a system-on-chip, combining integrated Hall
elements, analog front end and digital signal processing
in a single device.
The AS5043 provides a digital 10-bit as well as a
programmable analog output that is directly proportional
to the angle of a magnet, rotating over the chip.
The analog output can be configured in many ways,
including user programmable angular range, adjustable
output voltage range, voltage or current output, etc..
An internal voltage regulator allows operation of the
AS5043 from 3.3V or 5.0V supplies.
2 Benefits
Complete system-on-chip
Flexible system solution provides absolute output,
both digital and analog
Angle measurement with software programmable
range up to 360°
High reliability due to non-contact magnetic sensing
Ideal for applications in harsh environments
Robust system, tolerant to magnet misalignment,
airgap variations, temperature variations and
external magnetic fields
No calibration required
Figure 1: Typical Arrangement of AS5043 and Magnet
3 Key Features
360° contactless high resolution angular position
encoding
User programmable zero position
Two 10-bit absolute outputs:
Serial digital interface and
Versatile analog output
programmable angular range up to 360°
programmable ratiometric output voltage range
Failure detection mode for magnet field strength
and loss of power supply
Serial read-out of multiple interconnected
AS5043 devices using daisy chain mode
Mode input for optimizing noise vs. speed
Alignment mode for magnet placement guidance
Wide temperature range: - 40°C to + 125°C
Small package: SSOP 16 (5.3mm x 6.2mm)
4 Applications
The AS5043 is ideal for applications with an angular
travel range from a few degrees up to a full turn of
360°, such as
- Industrial applications:
- Contactless rotary position sensing
- Robotics
- Valve Controls
- Automotive applications:
- Throttle position sensors
- Gas / brake pedal position sensing
- Headlight position control
Front panel rotary switches
Replacement of potentiometers
www.austriamicrosystems.com
Revision 1.80
1 – 36
1 page  
AS5043
Data Sheet – 3.3V / 5V Operation
7 3.3V / 5V Operation
The AS5043 operates either at 3.3V ±10% or at 5V ±10%. This is made possible by an internal 3.3V Low-Dropout (LDO)
Voltage regulator. The core supply voltage is always taken from the LDO output, as the internal blocks are always
operating at 3.3V.
For 3.3V operation, the LDO must be bypassed by connecting VDD3V3 with VDD5V (see Figure 4 ).
For 5V operation, the 5V supply is connected to pin VDD5V, while VDD3V3 (LDO output) must be buffered by a 1...10µF
capacitor, which should be placed close to the supply pin.
The VDD3V3 output is intended for internal use only. It should not be loaded with an external load.
The voltage levels of the digital interface I/O’s correspond to the voltage at pin VDD5V, as the I/O buffers are supplied
from this pin (see Figure 4).
Figure 4: Connections for 5V / 3.3V Supply Voltages
A buffer capacitor of 100nF is recommended in both cases close to pin VDD5V. Note that pin VDD3V3 must always be
buffered by a capacitor. It must not be left floating, as this may cause an instable internal 3.3V supply voltage which may
lead to larger than normal jitter of the measured angle.
www.austriamicrosystems.com
Revision 1.80
5 – 36
5 Page 
AS5043
Data Sheet – Analog Output
11.1.2 Diagnostic Output Mode
Figure 9: Diagnostic Output Mode
Vref
100%
90%
analog
output
voltage
In an error case, the output
voltage is in the grey area
normal
operating
area
In Diagnostic Output Mode (see Figure 9)
the analog output of the internal DAC ranges
from 10% - 90% Vref*). In an error case,
either when the supply is interrupted or
when the magnetic field is in the “red” range,
(see Table 3) the output is switched to 0V
and thus indicates the error condition.
10%
0% 0°
90°
180°
270°
360° angle
It is possible to enable the analog output
permanently (it will not be switched off even
if the magnetic field is out of range). To
enable this feature an OTP bit in the factory setting must be set. The corresponding bit is FS6. See application note
AS5040-20 (Extended features of OTP programming) for further details. The application note is available for download at
the austriamicrosystems website.
The analog and digital outputs will have the following conditions:
Status
Normal operation
DAC Output Voltage
10% - 90% Vref*)
Magnetic field out of range
< 10% Vref*),
DAC output is switched to 0V
Broken positive power supply
(VOUT pull down resistor at receiving side)
Broken power supply ground
(VOUT pull down resistor at receiving side)
Broken positive power supply
(VOUT pull up resistor at receiving side)
Broken power supply ground
(VOUT pull up resistor at receiving side)
< 10% VDD**)
< 10% VDD**)
> 90% VDD**)
> 90% VDD**)
SSI Digital Output
#0 - #1023 (0°-360°), MagRngn = 1
#0 - #1023 (0°-360°)
out of range is signaled in status bits:
MagInc=MagDec=LIN=1, MagRngn= 0
with pull down resistor at DO (receiving
side), all bits read by the SSI will be “0”-
s, indicating a non-valid output
*) Vref = internal: ½ * VDD5V (pin #16) or external: VDACref (pin#9), depending on Ref_extEN bit in OTP (0=int., 1=ext.)
**) VDD = positive supply voltage at receiving side (3.0 – 5.5V)
www.austriamicrosystems.com
Revision 1.80
11 – 36
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AS5043.PDF ] | |
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