MLX90393 Triaxis® Magnetic Node
Datasheet
REVISION 003 - SEPTEMBER 14, 2017
3901090393
1. Features and Benefits
Absolute Position Sensor IC featuring
Triaxis® Hall Technology
Simple & Robust Magnetic Design
Miniature size for tiny assemblies
Selectable SPI and I2C bus protocols
Wide dynamic range (5-50mT) with on-the-
fly programmable gain
2.2V-3.6V supply for battery powered
applications, down to 1.8V IO voltage
On board filter settings
On the fly programmable operating modes
and sleep times for micro-power use
External and internal acquisition triggering
modes
External interrupt pin enables waking a
microcontroller when the field changes
On board temperature sensor
2. Application Examples
Non-contacting HMI applications with
push-pull functionality
Rotary knobs & dials
(Long stroke) Linear motion in one or
two axes for levers & sliding switches
Joystick (gimball or ball & socket)
Home Security 3D closure detection
Accurate liquid level sensing
Factory automation position sensing
Magnetic fingerprint detection
3. Description
The MLX90393 brings the highest flexibility in the
Triaxis portfolio's smallest packaged assembly.
Additionally, the MLX90393 is designed for
micropower applications, with programmable
duty cycles in the range of 0.1% to 100% allowing
for configurable power consumption based on
system requirements.
The MLX90393 magnetic field sensor can be
reprogrammed to different modes and with
different settings at run-time to fine-tune the
performance and power consumed. The sensor
offers a 16-bit output proportional to the
magnetic flux density sensed along the X, Y, and Z
axes using the Melexis proprietary Triaxis
technology and offers a 16-bit temperature
output signal. These digital values are available via
I2C and SPI, where the MLX90393 is a slave on the
bus. Multiple sensors can be connected to the
same bus, by A0 and A1 hardwired connection (4x)
but also through ordering codes with different SW
address (4x).
By selecting which axes are to be measured, the
raw data can be used as input for further post-
processing, such as for joystick applications,
rotary knobs, and more complex 3D position
sensing applications. Unparalleled performance is
achieved with this sensor, which is primarily
targeting industrial and consumer applications.
Figure 1: General Block Diagram
V
X
V
Y
V
Z
ADC
G
MUX
Temp Sensor
Bias
EEPROM
State Machine
RAM
Control
SPI/I2C
Interface
Low Power
Oscillator Wake-Up
Oscillator
V
T
Temp Compensation
VDD VDD_IO
SDA/MOSI
SCL/SCLK
MS/CS
Interrupt
Trigger
VSS
MISO
A0 A1
Triaxis®