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A1365 Datasheet(PDF) 21 Page - Allegro MicroSystems

Part No. A1365
Description  Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A1365 Datasheet(HTML) 21 Page - Allegro MicroSystems

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Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
With High-Bandwidth (120 kHz) Analog Output and Integrated Fault Comparator
A1365
21
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
UVLO Enable Counter will start counting. If VCC is higher
than VPORL when the counter reaches tUVLOE , the UVLO
function will be enabled and the ouput will be pulled near
GND [10]. The output will enter a high-impedance state as
VCC goes below VPORL [11]. If VCC falls below VPORL before
the UVLO Enable Couner reaches tUVLOE, the output will
transition directly into a high-impedance state [7'].
Detecting Broken Ground Wire
If the GND pin is disconnected, node A becoming open (see
Figure 12), the VOUT pin will go to a high-impedance state.
The output voltage will go to VBRK(HIGH) if a load resistor
RL(PULLUP) is connected to VCC or to VBRK(LOW) if a load resistor
RL(PULLDWN) is connected to GND. The device will not respond
to any applied magnetic field.
If the ground wire is reconnected, the A1365 will resume normal
operation.
A
Connecting VOUT to RL(PULLUP)
A1365
VCC
VCC
VCC
RL(PULLUP)
GND
A
VOUT
A1365
VCC
VCC
RL(PULLDWN)
Connecting VOUT to RL(PULLDWN)
VF(PULLUP)
RF(PULLUP)
FAULT
VF(PULLUP)
RF(PULLUP)
FAULT
GND
VOUT
GND
VF(PULLUP)
RF(PULLUP)
VOUT
A1365
VCC
V+
CBYPASS
CL
CF
(Optional)
FAULT
Figure 13: Typical Application Drawing
Figure 14: Connections for Detecting Broken Ground Wire


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