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PDF AS5215 Data sheet ( Hoja de datos )
| Número de pieza | AS5215 | |
| Descripción | Programmable 360 Magnetic Angle Encoder | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
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Data Sheet
www.DataSheet4U.com
AS5215
Programmable 360º Magnetic Angle Encoder with Buffered SINE &
COSINE Output Signals
1 General Description
2 Key Features
The AS5215 is a redundant, contactless rotary encoder sensor for
accurate angular measurement over a full turn of 360º and over an
extended ambient temperature range of -40ºC to +150ºC.
Based on an integrated Hall element array, the angular position of a
simple two-pole magnet is translated into analog output voltages.
The angle information is provided by means of buffered sine and
cosine voltages. This approach gives maximum flexibility in system
design, as it can be directly integrated into existing architectures and
optimized for various applications in terms of speed and accuracy.
With two independent dies in one package, the device offers true
redundancy. Usually the bottom die, which is exposed to slightly less
magnetic field is employed for plausibility check.
An SSI Interface is implemented for signal path configuration as well
as a one time programmable register block (OTP), which allows the
customer to adjust the signal path gain to adjust for different
mechanical constraints and magnetic field.
Contactless angular position encoding
High precision analog output
Buffered Sine and Cosine signals
SSI Interface
Low power mode
Two programmable output modes: Differential or Single ended
Wide magnetic field input range: 20 – 80 mT
Wide temperature range: -40ºC to +150ºC
Fully automotive qualified to AEC-Q100, grade 0
Thin punched 32-pin QFN (7x7mm) package
3 Applications
The AS5215 is ideal for Electronic Power Steering systems and
general purpose for automotive or industrial applications in
microcontroller-based systems.
Figure 1. AS5215 Block Diagram
PROG
CS
DCLK
DIO
OTP Register
Digital Part
SSI Interface
AS5215
POWER
MANAGEMENT
VDD
VSS
BUFFER Stage
Hall Array
&
Frontend
Amplifier
BUFFER Stage
Note: This Block Diagram presents only one die.
SINP/SINN
SINN/SINP/CM_SIN
COSP/COSN
COSN/COSP/CM_COS
www.austriamicrosystems.com/AS5215
Revision 1.8
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1 page  
AS5215
Data Sheet - Absolute Maximum Ratings
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5 Absolute Maximum Ratings
Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of
the device at these or any other conditions beyond those indicated in Electrical Characteristics on page 6 is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Table 2. Absolute Maximum Ratings
Parameter
Min Max Units
Comments
Supply voltage (VDD)
Input pin voltage (V_in)
Input current (latchup immunity), I_scr
-0.3
VSS - 0.5
-100
7
7
100
V
V
mA
Norm: EIA/JESD78 Class II Level A
Electrostatic discharge (ESD)
Total power dissipation (Ptot)
Package thermal resistance (Θ_JA)
Storage temperature (T_strg)
±2 kV
Norm: JESD22-A114E
275 mW
27 ºC/W Velocity =0; Multi Layer PCB; Jedec Standard Testboard
-65 150 ºC
Package body temperature (T_body)
Humidity non-condensing
Norm: IPC/JEDEC J-STD-020C.
The reflow peak soldering temperature (body temperature)
specified is in accordance with IPC/JEDEC J-STD-020C
260 ºC
“Moisture/Reflow Sensitivity Classification for Non-
Hermetic Solid State Surface Mount Devices”.
The lead finish for Pb-free leaded packages is matte tin
(100% Sn).
5 85 %
MSL = 3
www.austriamicrosystems.com/AS5215
Revision 1.8
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5 Page 
AS5215
Data Sheet - Detailed Description
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7.1.2 Magnet Thickness
Figure 6 shows the relationship of the peak amplitude in a rotating system (essentially the magnetic field strength of the Bz field component) in
relation to the thickness of the magnet. The X-axis shows the ratio of magnet thickness (or height) [h] to magnet diameter [d] and the Y-axis
shows the relative peak amplitude with reference to the recommended magnet (d=6mm, h=2.5mm). This results in an h/d ratio of 0.42.
Figure 6. Relationship of Peak Amplitude vs. Magnet Thickness
Bz amplitude vs. magnet thickness
of a cylindrical diametric magnet with 6mm diameter
160%
140%
120%
100%
80%
60%
40%
20%
d= 6mm x h= 2.5mm ref. magnet:
h/d = 0.42
Rel. amplitude = 100%
0%
0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 1,6 1,8
thickness to diameter [h/d] ratio
As the graph in Figure 6 shows, the amplitude drops significantly at h/d ratios below this value and remains relatively flat at ratios above 1.3.
Therefore, the recommended thickness of 2.5mm (at 6mm diameter) should be considered as the low limit with regards to magnet thickness.
It is possible to get 40% or more signal amplitude by using thicker magnets. However, the gain in signal amplitude becomes less significant for h/
d ratios >~1.3. Therefore, the recommended magnet thickness for a 6mm diameter magnet is between 2.5 and ~8 mm.
www.austriamicrosystems.com/AS5215
Revision 1.8
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