MLX90609
Angular Rate Sensor (Standard version)
390109060901
Page 15 of 22
Data Sheet
Rev 007
January/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:
1.
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.
2.
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.
3.
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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