Revision 1.0, 24-Oct-05
www.austriamicrosystems.com
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General Description
The AS5035 is a contactless magnetic incremental encoder
with 64 quadrature pulses per revolution (8-bit resolution)
and index output.
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 angular position of the magnet during assembly is not
critical as the AS5035 allows for a user programmable
zero-position to an accuracy of 0.35
Two diagnostic outputs are provided to indicate an out-of-
range condition of the magnetic field as well as movement
of the magnet in Z-axis. In addition, a specific combination
of output states indicate a loss of power supply.
The AS5035 is available in a small 16pin SSOP package. It
can be operated at either 3.3V or 5V supplies.
Typical arrangement of AS5035 and magnet
Benefits
-
Complete system-on-chip, including analog front end
and digital signal processing
-
2-channel quadrature and index outputs provide an
alternative to optical encoders
-
User programmable Zero positioning by OTP allows
easy assembly of magnet
-
Diagnostic features for operation safety
-
Ideal for applications in harsh environments due to
magnetic sensing principle
-
Robust system, tolerant to magnet misalignment, air
gap variations, temperature variations and external
magnetic stray fields
Key Features
-
Full turn (360) contactless angular position encoder
-
2 quadrature A/B outputs with 64 pulses per revolution
(ppr), 256 edges per revolution, 1.4 per step
-
Accurate user programmable zero position
-
Index output (one pulse per revolution)
-
Failure detection mode for magnet placement
monitoring and loss of power supply
-
Wide temperature range: - 40C to + 125C
-
Small lead-free package: SSOP 16 (5.3mm x 6.2mm)
Applications
-
Industrial applications:
- Robotics
- Replacement of optical encoders
- Flow meters
- Man-machine interface
-
Automotive applications:
- Power seat position sensing
- Power mirror position sensing
Pin Configuration
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
MagINCn
MagDECn
A
B
NC
Index
VSS
PROG
OTP_DO
OTP_CLK
CSn
NC
NC
NC
VDD3V3
VDD5V
AS5
0
3
5
AS5035 Pin configuration SSOP16
AS5035
Sin
Cos
Ang
Mag
MagINCn
MagDECn
Channel A
Channel B
Index
VDD5V
VDDV3V
OTP_CLK
OTP_DO
PROG
CSn
LDO 3.3V
Hall Array
&
Frontend
Amplifier
OTP
Zero
Position
DSP
Incremental
Decoder
AS5035 Block diagram
AS5035
8-bit (64 PPR) INCREMENTAL MAGNETIC ROTARY ENCODER
FACT SHEET
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