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AS5048B Datasheet

Magnetic Rotary Encoder


AS5048B Datasheet Preview


General Description
Figure 1:
Added Value of using AS5048
Benefits
No external programmer needed
High precision
Easy to use
Low material costs (no shielding)
ams Datasheet: 2014-Jun-05 [v1-06]
AS5048A/AS5048B
Magnetic Rotary Encoder
(14-bit Angular Position Sensor)
The AS5048 is an easy to use 360° angle position sensor with a
14-bit high resolution output. The maximum system accuracy
is 0.05° assuming linearization and averaging is done by the
external microcontroller.
The IC measures the absolute position of the magnet’s rotation
angle and consists of Hall sensors, analog digital converter and
digital signal processing. The absolute position information of
the magnet is directly accessible over a PWM output and can
be read out over a standard SPI or a high speed I²C interface.
AS5048A has a SPI interface, AS5048B I²C interface. Both devices
offer a PWM output.
The zero position can be programmed via SPI or I²C command.
This simplifies the assembly of the complete system because
the zero position of the magnet does not need to be
mechanically aligned. The sensor tolerates misalignment, air
gap variations, temperature variations and as well external
magnetic fields. This robustness and wide temperature range
(-40°C up to +150°C) of the AS5048 makes the IC ideal for
rotation angle sensing in harsh industrial and medical
environments. Several AS5048 ICs can be connected in daisy
chain for serial data read out. An internal voltage regulator
allows the AS5048 to operate at either 3.3 V or 5 V supplies.
Ordering Information and Content Guide appear at end of
datasheet.
Key Benefits & Features
The benefits and features of AS5048A/AS5048B, Magnetic
Rotary Encoder (14-bit Angular Position Sensor) are listed
below:
Features
Contactless rotary position sensor over 360°
Immune to external magnetic stray fields
14-bit resolution (0.0219°/LSB)
Standard SPI or I2C interface and PWM
Zero position programmable via SPI or I2C
Temperature range: -40°C to +150°C
AS5048A/AS5048B – 1
Page 1

Benefits
Figure 2:
AS5048A Block Diagram
Features
3.3V / 5V compliant
Package: 14-pin TSSOP (5 x 6.4mm)
Applications
The applications of AS5048 include:
• Robotic joint position detection
• Industrial motor position control
• Medical robots and fitness equipment
Block Diagram
The functional blocks of this device for reference are
shown below:
VDD3V
VDD5V
Register
LDO Setting
OTP
AFE
14-bit A/D
14-bit A/D
ATAN
(CORDIC)
AGC
GND
SPI
PWM
AS5048A
SCK
MISO
MOSI
CSn
PWM
AS5048A/AS5048B – 2
ams Datasheet: 2014-Jun-05 [v1-06]
Page 2

General Description
Figure 3:
AS5048B Block Diagram
VDD3V
VDD5V
Register
LDO Setting
OTP
AFE
1144--bbiitt AA//DD
ATAN
(CORDIC)
AGC
GND
I2C
PWM
AS5048B
SCL
SDA
A1
A2
PWM
ams Datasheet: 2014-Jun-05 [v1-06]
AS5048A/AS5048B – 3
Page 3
Part Number AS5048B
Manufactur ams
Description Magnetic Rotary Encoder
Total Page 30 Pages
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Related Datasheet

AS5048A , AS5048A , AS5048B , AS5048B ,

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