MAX9921AUB+ Maxim Integrated Products, MAX9921AUB+ Datasheet - Page 13

• Manufacturer Part Number: MAX9921AUB+
• Description: IC SENSOR HALL EFFECT 10-MSOP
• Manufacturer: Maxim Integrated Products
• Type: Hall Effect Sensorr

Specifications of MAX9921AUB+

• Input Type: Voltage
• Output Type: Logic
• Interface: 2-Wire
• Current - Supply: 1.3mA
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 3. Summary of Fault Protection and Recovery
Figure 5. Hall Input Re-Energized When Open Input is Reconnected to Hall Sensor
V
V
Hall input open
Hall input shorted
to battery
Hall input shorted
to ground
BAT
BAT
DESCRIPTION
< 6V
> 18V
FAULT
V
I
IN_
IN_
11.5mA
14V
0A
0V
Dual, 2-Wire Hall-Effect Sensor Interface
______________________________________________________________________________________
V
reverse-battery
IN
CRITERION
I
to external
protection
I
IN
IN
> V
diode
> 23mA
< 2mA
—
—
8V
BAT
due
Asserted low
Asserted low
Asserted low
Asserted low
Asserted low
OUTPUT
ERR
HALL INPUT
RECONNECTED
TO HALL SENSOR
4mA/µs
MAX9921 ACTIONS
Shutoff current to both Hall
sensors
Shutoff current to both Hall
sensors
Shutoff current to
corresponding Hall sensor
Shutoff current to
corresponding Hall sensor
Shutoff current to
corresponding Hall sensor.
50µA of pullup current is
sourced to IN1 or IN2 to
aid in troubleshooting.
HALL INPUT RESPONSE
V
BAT
- 500mV
Both IN1 and IN2 are restarted with blanking
cycle when V
Both IN1 and IN2 are restarted with blanking
cycle when V
When a Hall input is again loaded, terminating
open input condition, the Hall input are restarted
with blanking cycle.
If a Hall input is pulled more than 1V above
V
BAT supply and pull V
condition, current levels in the Hall inputs should
never exceed 100mA. For this reason, it is
recommended that one or more MAX9921s be
powered together and share a reverse-polarity
diode separate from other circuitry.
A falling edge at DIAG initiates a restart with a
blanking cycle of any Hall input that has been
shut off due to a short to ground. See the Hall
Input Short-to-Ground section.
BAT
with Diagnostics
, the input may back drive current into the
COMMENT/RECOVERY
BAT
BAT
returns to proper range.
returns to proper range.
BAT
up with it. In this
TIME
TIME
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