MLX90609EEA-R2 datasheet(15/22 Pages) MELEXIS

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MLX90609

Angular Rate Sensor (Standard version)

390109060901

Page 15 of 22

Data Sheet

Rev 008

February/08

6. Applications Examples

Figure 6-1. MLX90609 with

simultaneous analog and digital output

The MLX90609 can simultaneously output analog and digital signals.

The analog output signal can be fed to a microcontroller (µC) that contains an analog-to-digital

converter. A multiplexer can be used to select between the temperature and the angular rate

signals. The MLX90609 generates an internal reference voltage used for supplying the ADC,

thereby maintaining accuracy regardless of the supply voltage of the µC.

Whilst supplying the analog output signal, the MLX90609 can simultaneously send a digital output

signal to the µC through the SPI.

Notes:

The bandwidth of the MLX90609 can be selected by connecting an appropriate capacitor in

the FLT pin. CFLT implements a first order low pass filter cascaded with an internal 4-th order

SC filter. The –3dB bandwidth set by CFLT is: fOUT =0.16 / (ROUT*CFLT), with ROUT = 200k

(typ).

It is recommended to use CFLT even if the cut-off frequency is not specified to reduce

switching spikes at the output.

It is recommended to use X5R or X7R type capacitors. Min. voltage for C3 should be 25V or

more, and 10V or more for the other capacitors. Recommended values of decoupling

capacitors C1 and C2 are 1.0µF and 0.1µF for C3. These capacitors should be placed as close

as possible to their respective pins.

HVIN is a high impedance node. Be sure that an equivalent leakage resistance at this node

isn’t less then 2M

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