MLX91204 Datasheet, PDF (2/11 Pages) Melexis Microelectronic Systems – 360 Degrees Hi-Speed Rotary Position Sensor

MLX91204
360 Degrees Hi-Speed Rotary Position Sensor
(Sine/Cosine)
1 Functional Diagram
2 General Description
VDD GND
VX
Offset
Cancellation
Tria is™
Modulator
Offset
VY ^Cancellation
Amplifier
Buffer &
Filter X
Demodulator
Buffer &
Filter Y
Biasing
Unit
Calibration Unit
PV
PC
PD
X_OUT
CO_OUT
Y_OUT
The Tria⊗is® rotary position sensor MLX91204
detects the absolute angular position of a small
magnet that is positioned above the device
surface.
The MLX91204 reports two analog, linear,
orthogonal (quadrature) and ratiometric
output voltages proportional to the applied
magnetic flux density parallel to the chip
surface (thanks to the Integrated Magneto
Concentrator – IMC® – added on the top of
the sensitive Hall elements).
The MLX91204 is ideally suited for hi-speed
rotary position sensing in harsh automotive
and industrial environments.
The angular position is computed off-chip
from both sine and cosine signals.
3901091204
Rev 003
Page 2 of 11
Data Sheet
16/Jan/12