AS5045ASSU austriamicrosystems, AS5045ASSU Datasheet - Page 8

• Manufacturer Part Number: AS5045ASSU
• Description: IC, MAGNETIC ROTARY ENCODER 12BIT SSOP16
• Manufacturer: austriamicrosystems

Specifications of AS5045ASSU

• Ic Function: Encoder IC
• Supply Voltage Range: 3V To 3.6V, 4.5V To 5.5V
• Operating Temperature Range: -40°C To +125°C
• Digital Ic Case Style: SSOP
• No. Of Pins: 16
• Msl: MSL 3 - 168 Hours
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AS5045 12-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER
4
The AS5045 is manufactured in a CMOS standard
process and uses a spinning current Hall technology for
sensing the magnetic field distribution across the surface
of the chip.
The integrated Hall elements are placed around the
center of the device and deliver a voltage representation
of the magnetic field at the surface of the IC.
Through Sigma-Delta Analog / Digital Conversion and
Digital Signal-Processing (DSP) algorithms, the AS5045
provides
position information. For this purpose a Coordinate
Rotation Digital Computer (CORDIC) calculates the angle
and the magnitude of the Hall array signals.
The DSP is also used to provide digital information at the
outputs
movements of the used magnet towards or away from the
device’s surface.
Revision 1.5
Parameter
Programmed Zener Voltage (log.1)
Unprogrammed Zener Voltage (log. 0)
Functional Description
M a g I N C n
accurate
high-resolution
and
M a g D E C n
V
Symbol
V
unprogrammed
programmed
absolute
that
www.austriamicrosystems.com
Figure 4: AS5045 block diagram
indicate
angular
Min
1
Typ
A small low cost diametrically magnetized (two-pole)
standard
information (see Figure 17).
The AS5045 senses the orientation of the magnetic field
and calculates a 12-bit binary code. This code can be
accessed via a Synchronous Serial Interface (SSI). In
addition, an absolute angular representation is given by a
Pulse Width Modulated signal at pin 12 (PWM). This
PWM signal output also allows the generation of a direct
proportional analogue voltage, by using an external Low-
Pass-Filter.
The AS5045 is tolerant to magnet misalignment and
magnetic stray fields due to differential measurement
technique
Max
100
magnet
and
Unit
mV
Hall
V
provides
Note
V
Readback mode (see 8.4)
sensor
Ref
-V
PROG
the
conditioning
during Analog
angular
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circuitry.
position