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Allegro MicroSystems

A1156 Datasheet Preview

A1156 Datasheet

Two Wire Hall-Effect Switches

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A1150, A1152, A1153, A1155, A1156, A1157, and A1158
Chopper-Stabilized, Two-Wire Hall-Effect Switches
FEATURES AND BENEFITS
• AEC-Q100 automotive qualified
• High-speed, 4-phase chopper stabilization
• Low switchpoint drift throughout temperature range
• Low sensitivity to thermal and mechanical stresses
• On-chip protection
□Supply transient protection
□Reverse-battery protection
□On-board voltage regulator
□3 to 24 V operation
• Solid-state reliability
• Robust EMC and ESD performance
• Industry-leading ISO 7637-2 performance through use of
proprietary, 40 V clamping structures
Continued on the next page…
Packages
3-pin SOT23-W
2 mm × 3 mm × 1
mm (suffix LH)
3-pin ultramini SIP
1.5 mm × 4 mm × 3
mm (suffix UA)
2-pin ultramini SIP
1.5 mm × 4 mm × 4
mm (suffix UB)
Approximate footprint
DESCRIPTION
The A1150, A1152, A1153, A1155, A1156, A1157, and A1158
comprise a family of two-wire, unipolar, Hall-effect switches,
which are factory-trimmed to optimize magnetic switchpoint
accuracy.These devices are produced on theAllegro™ advanced
BiCMOS wafer fabrication process, which implements
a patented high-frequency, 4-phase, chopper-stabilization
technique. This technique achieves magnetic stability over
the full operating temperature range, and eliminates offsets
inherent in devices with a single Hall element that are exposed
to harsh application environments.
The A115x family has a number of automotive applications.
These include sensing seat track position, seat belt buckle
presence, hood/trunk latching, and shift selector position.
Two-wire unipolar switches are particularly advantageous in
cost-sensitive applications because they require one less wire
for operation versus the more traditional open-collector output
switches. Additionally, the system designer inherently gains
diagnostics because there is always output current flowing,
which should be in either of two narrow ranges. Any current
level not within these ranges indicates a fault condition.
All family members are offered in three package styles. The
LH is a SOT-23W style, miniature, low profile package for
surface-mount applications.The UAis a 3-pin, ultra-mini, single
inline package (SIP) for through-hole mounting. The UB is a
2-pin, ultra-mini, single inline package (SIP) for through-hole
mounting. All three packages are lead (Pb) free, with 100%
matte-tin leadframe plating.
UB package only
V+ VCC
LH & UA
package
only
0.01 µF
0.1 µF
Regulator
To all subcircuits
Clock/Logic
Amp
Low-Pass
Filter
Schmitt
Trigger
Polarity
A1152-DS, Rev. 10
Functional Block Diagram
GND
UA package only
GND




Allegro MicroSystems

A1156 Datasheet Preview

A1156 Datasheet

Two Wire Hall-Effect Switches

No Preview Available !

A1150, A1152, A1153, A1155,
A1156, A1157, and A1158
Features and Benefits (continued)
• Extended Operating Ambient temperature range,
–40°C to 150°C
• UB package with integrated 0.1 µF bypass capacitor
Chopper-Stabilized, Two-Wire
Hall-Effect Switches
Selection Guide
Part Number
Packing
Package
A1150LLHLX-T
A1150LUA-T
A1152LLHLX-T
A1152LUA-T
A1152LUBTN-T
A1153LLHLX-T
A1153LUA-T
A1153LUBTN-T
A1155LLHLX-T
A1155LUA-T
A1155LUBTN-T
A1156LLHLX-T
A1156LUA-T
A1156LUBTN-T
A1157LLHLX-T
A1157LLHLT-T
A1157LUA-T
A1158LLHLX-T
A1158LLHLT-T
A1158LUA-T
13-in. reel, 10 000 pieces/reel
Bulk, 500 pieces/bag
13-in. reel, 10 000 pieces/reel
Bulk, 500 pieces/bag
13-in. reel, 4 000 pieces/reel
13-in. reel, 10 000 pieces/reel
Bulk, 500 pieces/bag
13-in. reel, 4 000 pieces/reel
13-in. reel, 10 000 pieces/reel
Bulk, 500 pieces/bag
13-in. reel, 4 000 pieces/reel
13-in. reel, 10 000 pieces/reel
Bulk, 500 pieces/bag
13-in. reel, 4 000 pieces/reel
13-in. reel, 10 000 pieces/reel
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
13-in. reel, 10 000 pieces/reel
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
3-pin SOT23W surface mount
3-pin SIP through hole
3-pin SOT23W surface mount
3-pin SIP through hole
2-pin SIP through hole
3-pin SOT23W surface mount
3-pin SIP through hole
2-pin SIP through hole
3-pin SOT23W surface mount
3-pin SIP through hole
2-pin SIP through hole
3-pin SOT23W surface mount
3-pin SIP through hole
2-pin SIP through hole
3-pin SOT23W surface mount
3-pin SOT23W surface mount
3-pin SIP through hole
3-pin SOT23W surface mount
3-pin SOT23W surface mount
3-pin SIP through hole
Output (ICC) in
South Polarity
Field
Low
Low
High
Low
High
Low
High
Supply Current
at ICC(L)
(mA)
2 to 5
5 to 6.9
5 to 6.9
5 to 6.9
5 to 6.9
2 to 5
Magnetic Operate
Point, BOP
(G)
50 to 110
20 to 60
20 to 80
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2


Part Number A1156
Description Two Wire Hall-Effect Switches
Maker Allegro MicroSystems
Total Page 14 Pages
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