8 B i t P r o g r a m m a b l e M a g n e t i c R o ta r y E n c o d e r
with Motion Detection & Multiturn
D a ta S he e t
1 General Description
The AS5130 is a contactless magnetic rotary encoder
for accurate angular measurement over a full turn of
360º. It is a system-on-chip, combining integrated Hall
elements, analog front end and digital signal processing
in a single device. The angle can be measured using
only a simple two-pole magnet rotating over the center
of the chip. 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 8 bit = 256 positions per revolution. This
digital data is available as a serial bit stream and as a
PWM signal. The AS5130 can be operated in pulsed
mode (Vsupply=off), which reduces the average power
consumption significantly. During Vsupply=off, the
measured angle can be stored using an internal storage
register supplied by a low power voltage line. This mode
achieves very low power consumption during polling of
the rotary position of the magnet. If the position of the
magnet changes, then the motion detection feature
wakes up an external system. The device is capable of
counting the amount of magnet revolutions. The multi
turn counter value is stored in a register and can be read
in addition to the angle information. Furthermore, any
arbitrary position can be set as zero-position. The
system is tolerant to misalignment, air gap variations,
temperature variations and external magnetic fields and
high reliability due to non-contact sensing.
Figure 1. Block Diagram
SINP / SINN / COSP / COSN
2 Key Features
360º contactless angular position encoding
Two digital 8-bit absolute outputs:
- Serial interface
- Pulse width modulated (PWM) output
User programmable zero position
High speed: up to 30000 rpm
Failure detection mode for magnet placement moni-
toring and loss of power supply
Wide temperature range: - 40ºC to +125ºC
Multi Turn counter / Movement detection
Small Pb-free package: SSOP-16 (5.3mm x 6.2mm)
Automotive qualified to AEC-Q100, grade 1
3 Applications
The AS5130 is an ideal solution for Ignition key position
sensing, Steering wheel position sensing, Transmission
gearbox encoder, Front panel rotary switches and
replacement of Potentiometers.
AS5130
Sin
PWM
Decoder
PWM
Hall Array
&
Frontend
Amplifier
Cos
tracking
ADC &
Angle
decoder
Angle
Zero
Pos.
Mag
AGC
Absolute
Serial
Interface
(SSI)
DIO
CS
DCLK
C1
CAO
AGC
power management
OTP
PROG
www.austriamicrosystems.com
Revision 1.09
1 - 40
AS5130
Data Sheet - A p p l i c a t i o n s
Contents
1 General Description..............................................................................................................................
2 Key Features ........................................................................................................................................
Magnetic Input Range ..........................................................................................................................................
Connecting the AS5130 .....................................................................................................................................
Serial 3-Wire Connection (Default Setting) ....................................................................................................
Serial 3-Wire Connection (OTP Programming Option) ..................................................................................
Analog Output ................................................................................................................................................
Analog Sin/Cos Outputs with External Interpolator ........................................................................................
Serial Synchronous Interface (SSI) ....................................................................................................................
10
10
10
12
12
13
14
15
Commands of the SSI in Normal Mode.......................................................................................................... 15
Commands of the SSI in Extended Mode ...................................................................................................... 16
Multi Turn Counter..............................................................................................................................................
AS5130 Status Indicators ...................................................................................................................................
19
19
Lock Status Bit ............................................................................................................................................... 19
Magnetic Field Strength Indicators................................................................................................................. 20
High Speed Operation ........................................................................................................................................
Digital Readout Rate ......................................................................................................................................
Total Propagation Delay of the AS5130 .........................................................................................................
Reduced Power Modes ......................................................................................................................................
20
21
21
21
21
22
22
22
Low Power Mode ........................................................................................................................................... 22
Power Cycling Mode ...................................................................................................................................... 23
8 Application Information .......................................................................................................................
Benefits of AS5130............................................................................................................................................
Application Example 1 ........................................................................................................................................
Application Example II 3-wire sensor with magnetic field strength indication.....................................................
Application Example III: Low-power encoder .....................................................................................................
Application Example IV: Polling mode................................................................................................................
Accuracy of the Encoder system ........................................................................................................................
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