PRODUCT INFORMATION
HAL 3625
Sept/2009
HAL
®
3625
Programmable Direct Angle Sensor
The HAL 36xy family is a new generation of
Hall-effect sensors. Due to its advanced
vertical Hall-plate technology it enables the
possibility to measure magnetic fields in the
chip plane. With this technology it is possi-
ble to directly measure rotation angles in a
range of 0° to 360° with simple magnetic
arrangements. The first member of this fam-
ily is the HAL 3625.
Two on-chip vertical Hall plates measure
both magnetic field components BX and BY.
The direct angle information is internally
calculated by the sensor using the inverse
tangent function and converted into an ana-
log output voltage. Due to the measurement
method, the sensor provides an excellent
drift performance over temperature and
therefore a new class of accuracy.
The sensor provides a linear, ratiometric
analog output signal with implemented wire-
break detection working with a pull-up or
pull-down resistor.
Major characteristics like gain and offset of
X- and Y-channel, zero-angle position,
phase shift between X- and Y-channel, out-
put slope and offset and clamping levels
can be adjusted to the magnetic circuit by
programming the non-volatile memory.
The HAL 3625 is available in the very small
SOIC8 SMD package.
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X- and Y-channel gain and offset of sig-
nal path programmable
Phase shift between X- and Y-channel
programmable
Programmable output clamping volt-
ages for error band definition
Programmable magnet lost detection
32 bit identification number for customer
Operates from –40 °C up to 170 °C
junction temperature
Operates from 4.5 V up to 5.5 V supply
voltage
Short-circuit protected push-pull output
Over- and reverse-voltage protection at
V
DD
pin
On-board diagnostic functions
Main Features
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Angular accuracy of
±1.0°
for 360° angle
range
Angle measurement is extremely is
robust against temperature and stress
influence
Ratiometric linear analog output is pro-
portional to the measured angle
Integral non-linearity error of output sig-
nal
±0.1%
of V
DD
Ratiometric error of output signal
±0.2%
Output response time 1 ms (slow mode)
Low output noise of 0.2° rms
Wire-break detection with pull-up or pull-
down resistor
Over- and undervoltage detection
Programmable characteristics in a non-
volatile memory with redundancy and
lock function
Programming of the sensor via its output
with TTL level
Programmable output slope and offset
Applications
Due to the sensor’s versatile program-
ming characteristics and its high accu-
racy, the HAL 3625 is the optimal system
solution for applications such as:
– Contactless potentiometers
– Rotary position measurement
MICRONAS [ MICRONAS ]
