Specifications

Motor Control
Sensing motor speed, position, and movement
100 Maxim Industrial Solutions
Benefits
• Enhanced functionality simplifies
motor-control design
– Select the sampling period of 160µsec,
500µs, and 50ms by simply adjusting the
RATE pin
– Choose the threshold point of the switch
by setting the ADJ pin
• High integration simplifies measurement
of speed and direction and reduces
system cost
– Two Hall-effect sensors in a single IC
– Direction and speed information is
gathered simultaneously
– 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. Three
programmable sampling periods of 160µs, 500µs, and 50ms give the
designer flexibility to choose the operating speed. By setting the
adjust pin, the MAX9641’s operating point can be easily adjusted
to three points which accommodate many different magnetic
materials. Integrating two Hall-effect sensors into one chip reduces
the overall system’s cost. The user retrieves the information about the
speed and direction of the magnet’s movement with built-in logic
communication.
*Future product—contact factory for availability.
Simplify system design with flexible operating inputs
MAX9641*
µC/FPGA/
CHIPSET
PROCESSOR
MODE GND
OUT
DIR
OUT
DIR
V
DD
3.3V
N S
S N
Dual Hall-effect switch solution.