AS5030 Datasheet, PDF (1/3 Pages) ams AG – 8-BIT PROGRAMMABLE HIGH SPEED ABSOLUTE MAGNETIC ROTARY ENCODER

AS5030 8-BIT Programmable Magnetic Rotary Encoder
AS5030 _AS5030
8-BIT PROG8RBAIMT PMRAOBGLRAEMHMIAGBHLESHPIEGHEDSPAEEBDSOLUTE
MAGNETIC R^MO^AGT^NA^ER^TY^ICE^RN^OTC^AO^RD^YE^ER^NCODER
TENTATIVE FACT SHEET
PRELIMINARY DATA SHEET
1 General Description
The AS5030 is a contactless magnetic rotary encoder for
accurate angular measurement over a full turn of 360°.
It is a system-on-chip, combining integrated Hall
elements, analog front end and digital signal processing
in a single device.
To measure the angle, only a simple two-pole magnet,
rotating over the center of the chip is required.
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.
In addition to the angle information, the strength of the
magnetic field is also available as a 6-bit code.
Data transmission can be configured for 1-wire (PWM),
2-wires (CLK, DIO) or 3-wires (CLK, DIO, CS).
A software programmable (OTP) zero position simplifies
assembly as the zero position of the magnet does not
need to be mechanically aligned.
A power down mode together with fast startup- and
measurement cycles allows for very low average power
consumption and makes the AS5030 also suitable for
battery operated equipment.
2 Key Features
- 360°contactless angular position encoding
- Two digital 8-bit absolute outputs:
- Serial interface and
- Pulse width modulated (PWM) output
- User programmable zero position
- High speed: up to 30.000 rpm
- Direct measurement of magnetic field strength allows
exact determination of vertical magnet distance
- Serial read-out of multiple interconnected AS5030
devices using daisy chain mode
- Wide magnetic field input range: 20 – 80mT
- Wide temperature range: - 40°C to + 125°C
- Small Pb-free packages: TSSOP 16
3 Applications
- Industrial applications:
- Contactless rotary position sensing
- Rotary switches (human machine interface)
- AC/DC motor position control
- Robotics
- Encoder for battery operated equipment
- Automotive applications:
- Steering wheel position sensing
- Dashboard rotary switches
- Headlight position control
Figure 1: Typical arrangement of AS5030 and magnet
1.1 Benefits
- Complete system-on-chip, no calibration
required
- Flexible system solution provides absolute
output, with serial data and PWM output
- Ideal for applications in harsh environments due
to magnetic sensing principle
- High reliability due to non-contact sensing
- Robust system, tolerant to horizontal misalignment,
airgap variations, temperature variations and
external magnetic fields
Hall Array
&
Frontend
Amplifier
Angle
Sin
tracking ADC _Zero
Cos
& Angle
Pos.
decoder
Mag
AGC
AGC
PWM
Decoder
Absolute
Serial
Interface
(SSI)
power management
OTP
Figure 2: AS5030 block diagram
PWM
DX
DIO
CS
CLK
C2
MagRngn
PROG
Rev. 1.0 30-04-06
www.austriamicrosystems.com
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