Interface IC. A6850 Datasheet

A6850 IC. Datasheet pdf. Equivalent

Part A6850
Description Dual Channel Switch Interface IC
Feature www.DataSheet4U.com A6850 Dual Channel Switch Interface IC ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ Features and.
Manufacture Allegro MicroSystems
Datasheet
Download A6850 Datasheet



A6850
A6850
Dual Channel Switch Interface IC
Features and Benefits
4.75 to 26.5 V operation
Low VIN-to-VOUT voltage drop
1/10 current sense feedback
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 sensor ICs
Package: 8 pin SOIC (suffix L)
Approximate Scale 1:1
Description
The AllegroA6850 is designed to interface between a
microprocessor and a pair of 2-wire Hall effect sensor ICs.
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 device applications require the user to
measure the supply current to determine whether the Hall IC
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 Hall device.
Continued on the next page…
Functional Block Diagram
ENABLE1
ENABLE2
VIN
Control
Block
SENSE1
×1/10 IOUTPUT1
Fault
Detection
OUTPUT1
6850-DS Rev. 5
SENSE2
×1/10 IOUTPUT2
Fault
Detection
GROUND
OUTPUT2



A6850
A6850
Dual Channel Switch Interface IC
Description (continued)
The A6850 eliminates the need for the external series shunt resistor
in Hall device applications by incorporating an integrated current
mirror which reports the Hall IC supply current as a 1/10 value on
the SENSE1 or SENSE2 output pin. A low current Sleep mode is
available (<15 μA) by driving both ENABLE pins low. Also, the
A6850 can be used to interface to mechanical switches.
The A6850 is supplied in an 8-pin Pb (lead) free SOIC package,
with 100% matte tin leadframe plating.
Selection Guide
Part Number
A6850KLTR-T
Packing
13-in. reel, 3000 pieces/reel
Absolute Maximum Ratings
Characteristic
Supply Voltage
Output Voltage
SENSEx Voltage Range
ENABLEx Voltage Range
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
ESD Rating - Human Body Model
ESD Rating - Charged Device Model
Symbol
VIN
VOUTPUTx
VSENSEx
VENABLEx
TA
TJ(max)
Tstg
HBM
CDM
Notes
AEC-Q100-002; OUTPUT1 and OUTPUT2
AEC-Q100-002; all other pins
AEC-Q100-011; all pins
Rating
40
–0.3 to 40
–0.3 to 7
–0.3 to 7
–40 to 150
150
–55 to 150
4.5
2.5
1050
Units
V
V
V
V
ºC
ºC
ºC
kV
kV
V
Pin-out Diagram
ENABLE1 1
SENSE1 2
Control Switch
8 OUTPUT1
7 GROUND
ENABLE2 3
SENSE2 4
Switch
6 OUTPUT2
5 VIN
Terminal List Table
Name
Number
ENABLE1
1
SENSE1
2
ENABLE2
3
SENSE2
4
VIN 5
OUTPUT2
6
GROUND
7
OUTPUT1
8
Description
Digital input pulled to ground
Sensed current output
Digital input pulled to ground
Sensed current output
Chip power supply voltage
Switchable voltage supply to sensor IC
Ground reference
Switchable voltage supply to sensor IC
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
Characteristic
Symbol
Test Conditions*
Package Thermal Resistance
RθJA
4-layer PCB based on JEDEC standard
1-layer PCB with copper limited to solder pads
*Additional thermal data available on the Allegro Web site.
Value Units
80 ºC/W
140 ºC/W
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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