The MAX9621 is a continuation of the Maxim family of Hall-effect sensor interfaces that already includes the MAX9921. The MAX9621 provides a single-chip solution to interface two 2-wire Hall-effect sensors to low voltage
microprocessors (µP) through either a digital output for
Hall-effect switches or an analog output for linear information
or both.
The MAX9621 protects the Hall 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 off the current to
the Hall sensors. When a short-to-ground fault condition
is detected, the current to the Hall input is shut off and
the condition is indicated at the analog output by a zero-current
level and a high digital output.
The MAX9621 provides a minimum of 50µs blanking time following Hall sensor power-up or restart. The open-drain digital outputs are compatible with logic levels up to 5.5V.
The MAX9621 is available in a 3mm x 5mm, 10-pin
µMAX® package and is rated for operation in the -40°C
to +125°C temperature range.
주요기능
애플리케이션/용도
S Provides Supply Current and Interfaces to Two
2-Wire Hall-Effect Sensors
S 5.5V to 18V Operating Voltage Range
S Protects Hall Sensors Against Up to 60V Supply
Transients
Low-Power Shutdown for Power Saving
Filtered Digital Outputs
Analog Output Mirrors the Hall Sensor Current
Hall Inputs Protected from Short to Ground
Hall Sensor Blanking Following Power-Up and Restart from Shutdown and Short to Ground
Operates with ±3V Ground Shift Between the Hall Sensor and the MAX9621
±2kV Human Body Model ESD and ±200V Machine Model ESD at All Pins
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