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PDF MLX90393 Data sheet ( Hoja de datos )
| Número de pieza | MLX90393 | |
| Descripción | Magnetometer | |
| Fabricantes | Melexis | |
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MLX90393
Micropower Triaxis® Magnetometer Datasheet
Part No. Temperature Code Package Code Silicon Version Option Code Packing Format
MLX90393 S (-20°C to 85°C) LW (QFN16 3x3mm)
ABA
011 RE (Reel)
1. Scope
This document holds the specification of a 3-axis magnetometer targeting low-power applications. The IC is
based on the Hall-effect and the patented Triaxis® technology from Melexis. The output signals (raw X, Y, Z
Magnetic data and Temperature data) will be provided through the I2C fast mode protocol, or via half-
duplex SPI (3- or 4-wire). There is an on-board non-volatile memory to store calibration data on-chip.
BIAS
Triais™
VX
VY
VZ
Temp
Sensor
16b
IA
ADC
VDD
LP OSC
Wake-up
OSC EEPROM
Figure 1: High-level Block Diagram
VSS
3901090393
Rev002
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Data Sheet
Feb-2015
1 page  
MLX90393
Micropower Triaxis® Magnetometer Datasheet
Maximum ODR
OSR
for OSR2=0x0 [Hz] 0 1 2 3
0 716.9 493.0 303.4 171.5
1 622.7 408.0 241.5 133.0
2 493.0 303.4 171.5 91.8
3 348.0 200.6 108.6 56.6
4 219.2 119.6 62.6 32.1
5 125.9 66.1 33.9 17.2
6 68.0 34.9 17.7 8.9
7 35.4 18.0 9.0 4.5
Table 2: Maximum Output Data Rate (ODR) as a function of OSR & DIG_FILT (scales w/ main oscillator variations)
3901090393
Rev002
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Data Sheet
Feb-2015
5 Page 
MLX90393
Micropower Triaxis® Magnetometer Datasheet
the master have failed to read out any of them by the time the sensor has made a new conversion, the
INT/DRDY pin will be strobed low for 10us, and the next rising edge will indicate a new set of data is ready.
7.2 Single Measurement mode
Whenever the sensor is set to this mode (or after startup) the MLX90393 goes to the IDLE state where it
awaits a command from the master to perform a certain acquisition. The duration of the acquisition will be
the concatenation of the TSTBY, TACTIVE, m*TCONVM (with m # of axes) and TCONVT. The conversion time will
effectively be programmable by the user (see burst mode), but is equally a function of the required
axes/temperature to be measured.
Upon reception of such a polling command from the master, the sensor will make the necessary
acquisitions, and set the DRDY signal high to flag that the measurement has been performed and the master
can read out the data on the bus at his convenience. The INT/DRDY will be cleared either when:
• The master has issued a command to read out at least one of the measured components
• The master issues an Exit (EX) command to cancel the measurement
• The chip is reset, after POR (Power-on reset) or Reset command (RT)
7.3 Wake-Up on Change mode
The Wake-Up on Change (WOC) functionality can be set by the master with as main purpose to only receive
an interrupt when a certain threshold is crossed. The WOC mode will always compare a new burst value
with a reference value in order to assess if the difference between both exceeds a user-defined threshold.
The reference value is defined as one of the following:
• The first measurement of WOC mode is stored as reference value once, as a result of a
measurement. This measurement at “t=0” is then the basis for comparison or,
• The reference for acquisition(t) is always acquisition(t-1), in such a way that the INT signal will only
be set if the derivative of any component exceeds a threshold.
• The in-application programmability is the same as for burst mode, but now the thresholds for
setting the interrupt are also programmable by the user, as well as the reference, if the latter is
data(t=0) or data(t-1).
3901090393
Rev002
Page 11
Data Sheet
Feb-2015
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet MLX90393.PDF ] | |
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