Specifications

69Sensors: Featured Products
Featured Products
Reliable Hall-Eect Sensor Interface Provides
Flexibility and Reduces Component Count
MAX9621
The MAX9621 provides a single-chip solution to interface two 2-wire Hall-
eect sensors to low-voltage microprocessors (µP) through either a digital
output for Hall-eect switches or an analog output for linear information, or
both. The MAX9621 protects the Hall-eect sensors from supply transients up
to 60V at the BAT supply. Normal operating supply voltage ranges from 5.5V
to 18V. If the BAT supply rises above 18V, the MAX9621 shuts o the current
to the Hall-eect sensors. When a short-to-ground fault condition is detected,
the current to the Hall-eect input is shut o and the condition is indicated
at the analog output by a zero-current level and a high digital output.
Benefits
• Reliably monitor the status of 2-wire
Hall-effect sensors
◦ Automotive grade solution works in
harsh conditions
◦ Withstands supply voltage
transients up to 60V
◦ Digital output filtering
• Provides flexibility
◦ Easy interface to the microprocessor
◦ Both analog and digital outputs are
available
◦ Wide supply voltage range
operation
ELECTRIC MOTOR
N
S
ADIAG
AOUT1
AOUT2
GND
CH1
CH2
V
BAT
DOUT2
FILTER
HALL-EFFECT
SENSOR
µP
MAX9621