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D atasheet
AS5130
8-Bit Programmable Magnetic Rotary Encoder with Motion Detection
& Multiturn
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. AS5130 Block Diagram
2 Key Features
360º contactless angular position encoding
- Serial interface
- Pulse width modulated (PWM) output
User programmable zero position
High speed: up to 30000 rpm
Failure detection mode for magnet placement monitoring and
loss of power supply
Wide temperature range: -40ºC to +125ºC
Multi Turn counter / Movement detection
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Automotive qualified to AEC-Q100, grade 1
Small Pb-free package: SSOP-16 (5.3mm x 6.2mm)
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.
SINP / SINN / COSP / COSN
AS5130
PWM Decoder
Ang
Sin
Cos
Tracking ADC
& Angle
Decoder
Zero
Postion
Hall Array
&
Frontend
Amplifier
Absolute
Serial
Interface
(SSI)
Mag
AGC
AGC
Power Management
OTP
Revision 1.12
lv
PWM
DIO
CS
C1
DCLK
CAO
PROG
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Two digital 8-bit absolute outputs:
AS5130
Datasheet - C o n t e n t s
Contents
1 General Description ..................................................................................................................................................................
5 Absolute Maximum Ratings ......................................................................................................................................................
6.2 Magnetic Input Range ..........................................................................................................................................................................
7.1 Connecting the AS5130........................................................................................................................................................................
Analog Output............................................................................................................................................................................ 12
Analog Sin/Cos Outputs with External Interpolator.................................................................................................................... 13
15
7.2.1 Commands of the SSI in Normal Mode ..................................................................................................................................... 15
7.2.2 Commands of the SSI in Extended Mode.................................................................................................................................. 16
7.4 Multi Turn Counter..............................................................................................................................................................................
7.5 AS5130 Status Indicators ...................................................................................................................................................................
7.5.1 Lock Status Bit........................................................................................................................................................................... 19
7.5.2 Magnetic Field Strength Indicators ............................................................................................................................................ 19
7.7 High Speed Operation ........................................................................................................................................................................
Digital Readout Rate..................................................................................................................................................................
Total Propagation Delay of the AS5130 ....................................................................................................................................
7.8 Reduced Power Modes ......................................................................................................................................................................
7.8.1 Low Power Mode ....................................................................................................................................................................... 22
7.8.2 Power Cycling Mode.................................................................................................................................................................. 23
8 Application Information ...........................................................................................................................................................
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8.1 Application Example I: 3-Wire Sensor with Magnetic Field Strength Indication .................................................................................
8.2 Application Example II: Low-Power Encoder......................................................................................................................................
8.3 Application Example III: Polling Mode ................................................................................................................................................
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AS5130
Datasheet - C o n t e n t s
8.4 Accuracy of the Encoder System .......................................................................................................................................................
Vertical Distance of the Magnet.................................................................................................................................................
Choosing the Proper Magnet.....................................................................................................................................................
Lateral Displacement of the Magnet ..........................................................................................................................................
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