Specifications

Sensors
Hall-effect sensors
84 Maxim Industrial Solutions
Benefits
• Simplifies system design with enhanced
functionality
– User-selectable sampling period
of 160µs, 500µs, and 50ms with an
adjustable RATE pin
– The switch’s threshold point can be
easily chosen by setting the ADJ pin
• Simplifies the measurement of speed
and direction
– Dual Hall-effect sensors integrated in a
single IC
• Reduces system cost
– Information for both direction and
speed is gathered with a single IC
– 1.7V to 5.5V supply voltage range is
compatible with many system designs
MAX9641*
The MAX9641 is an ultra-low-power, dual, Hall-effect switch with
adjustable threshold operation and selectable sampling frequency.
Three programmable sampling periods (160µs, 500µs, and 50ms)
provide flexibility for choosing the operating speed. The operating
point of the Hall-effect switch can be easily adjusted to three points
by setting the adjust pin. With logic communication built in, the
user can retrieve information about the speed and direction of the
magnet’s movement. Combining two Hall-effect sensors into one
chip reduces overall system cost.
*Future product—contact factory for availability.
Simplify motion detection and system design with dual Hall-effect switch
MAX9641*
µC/FPGA/
CHIPSET
PROCESSOR
MODE GND
OUT
DIR
OUT
DIR
V
DD
3.3V
N S
S N
Dual Hall-effect switch solution.