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AS5045B
12-Bit Programmable Magnetic Position Sensor
www.ams.com Revision 1.0 1 - 33
1 General Description
The AS5045B is a contact less magnetic position sensor for accurate
angular measurement over a full turn of 360 degrees.
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 magnet can be placed above
or below the IC.
The absolute angle measurement provides instant indication of the
magnet’s angular position with a resolution of 0.0879º = 4096
positions per revolution. This digital data is available as a serial bit
stream and as a PWM signal.
An internal voltage regulator allows the AS5045B to operate at either
3.3V or 5V supplies.
2 Key Features
Contact less high resolution rotary position sensor over a full
turn of 360 degrees
Figure 1. Blockdiagram Rotary Position Sensor IC
Two digital 12-bit absolute outputs:
- Serial interface
- Pulse width modulated (PWM) output
Quadrature A/B/I output 12-bit
User programmable zero position
Failure detection mode for magnet placement, monitoring, and
loss of power supply
Red-Yellow-Green indicators display placement of magnet in Z-
axis
Serial read-out of multiple interconnected AS5045B devices
using Daisy Chain mode
Tolerant to magnet misalignment and gap variations
Wide temperature range: - 40ºC to +125ºC
Small Pb-free package: SSOP 16 (5.3mm x 6.2mm)
3 Applications
The device is ideal for industrial applications like automatic or
elevator doors, robotics, motor control and optical encoder
replacement.
ATAN
(Cordic)
Hall Array
&
Frontend
Amplifier
Absolute
Interface
(SSI)
Incremental
Interface
Sin
Cos
Ang
Mag
MagINCn
MagDECn
DO
PWM
CLK
A
B
PDIO
CSn
PWM
Interface
OTP
Register
VDD5V
VDD3V3
LDO 3.3V
AS5045B
I
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 3 Seite 4
- ・ Abmessungen des Paketumrisses on Seite 28 Seite 29 Seite 30
- ・ Teilenummerierungssystem on Seite 32
- ・ Markierungsinformationen on Seite 28 Seite 29 Seite 30
- ・ Blockdiagramm on Seite 1
- ・ Beschreibung der Funktionen on Seite 1
- ・ Technische Daten on Seite 5 Seite 8
- ・ Anwendungsbereich on Seite 1 Seite 33
- ・ Elektrische Spezifikation on Seite 5 Seite 6 Seite 7 Seite 8 Seite 9
