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A6850KL-T Datasheet

  • A6850KL-T

  • Dual Channel Switch Interface IC

  • ALLEGRO   ALLEGRO

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A6850
Dual Channel Switch Interface IC
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Features and Benefits
4.75 to 26.5 V operation
Low V
IN
-to-V
OUT
voltage drop
1
/ current sense feedback
10
Survive short-to-battery and short-to-ground faults
Survive 40 V load dump
>4 kV ESD rating on the output pins, >2 kV on all other pins
Output current limiting
Low operating and Sleep mode currents
Integrates with Allegro A114x and A118x Hall effect
two-wire sensors
Description
The Allegro
廬
A6850 is designed to interface between a
microprocessor and a pair of 2-wire Hall effect sensors.
The A6850 uses protected high-side low resistance DMOS
MOSFETs to switch the supply voltage to the two Hall effect
devices. Each switch can be controlled independently via
individual ENABLE pins and both switches are protected
with current-limiting circuitry. The output switches are rated
to operate to 26.5 V and will source at least 25 mA per channel
before current limiting.
Typical two-wire Hall sensor applications require the user
to measure the supply current to determine whether the Hall
sensor is switched on (magnetic field present) or switched off
(no magnetic field present). This is usually accomplished by
using an external series shunt resistor and protection circuits
for the microprocessor. In many systems, the sensed voltage is
used as the input to a microprocessor analog-to-digital (A-to-D)
input. This provides the system with an indication of the status
of the two-wire switch as well as provides the capability for
diagnostic information if there is an open or shorted sensor.
Package: 8 pin SOIC (suffix L)
Approximate Scale 1:1
Continued on the next page鈥?/div>
Functional Block Diagram
VIN
ENABLE1
Control
Block
ENABLE2
SENSE1
1
/
10
脳
I
OUTPUT1
Fault
Detection
OUTPUT1
SENSE2
1
/
10
脳
I
OUTPUT2
Fault
Detection
OUTPUT2
GROUND
6850-DS

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