A1157LUA-T Allegro Microsystems Inc, A1157LUA-T Datasheet

A1157LUA-T

Manufacturer Part Number

A1157LUA-T

Description

IC SW HALL EFFECT CHOPPER 3SIP

Manufacturer

Allegro Microsystems Inc

Series

-r

Type

Unipolar Switchr

Datasheets

1.A1152LLHLX-T.pdf (12 pages)

2.A1157LUA-T.pdf (12 pages)

Specifications of A1157LUA-T

Sensing Range

80G Trip, 10G Release

Voltage - Supply

3 V ~ 24 V

Current - Supply

5mA

Current - Output (max)

Output Type

2-Wire Serial

Features

Operating Temperature

40°C ~ 150°C

Package / Case

Magnetic Type

Unipolar

Operating Supply Voltage (min)

Operating Supply Voltage (typ)

3.3/5/9/12/15/18V

Operating Supply Voltage (max)

24V

Mag Sensor Operate Point (g)

80Gs

Mag Sensor Release Point (g)

10Gs

Mag Sensor Hysteresis(g)

30Gs

Package Type

SIP

Pin Count

Mounting

Through Hole

Operating Temp Range

-40C to 150C

Operating Temperature Classification

Automotive

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Other names

620-1409

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

A1157LUA-T

Manufacturer:

Quantity:

101

Current page: 1 of 12
Download datasheet (262Kb)

Packages

Features and Benefits

▪ High speed, 4-phase chopper stabilization

▪ Low switchpoint drift throughout temperature range

▪ Low sensitivity to thermal and mechanical stresses

▪ On-chip protection

▪ Solid-state reliability

▪ Robust EMC and ESD performance

▪ Industry leading ISO 7637-2 performance through use of

A1152-DS, Rev. 3

▫ Supply transient protection

▫ Reverse battery protection

▫ On-board voltage regulator

▫ 3.0 to 24 V operation

proprietary, 40-V clamping structures

3-pin SOT23-W

2 mm × 3 mm × 1 mm

(suffix LH)

Approximate footprint

V+

0.01 μF

VCC

3-pin ultramini SIP

1.5 mm × 4 mm × 3 mm

(suffix UA)

Chopper-Stabilized, Two Wire Hall-Effect Switches

A1150, A1152, A1153, A1155, A1156, A1157, and A1158

Functional Block Diagram

Clock/Logic

Regula

Amp

tor

To all subcircuits

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 the Allegro® 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.

Continued on the next page…

Low-Pass

Filter

Schmitt

Trigger

UA package only

Polarity

GND

Related parts for A1157LUA-T

A1157LUA-T Summary of contents

Page 1

Chopper-Stabilized, Two Wire Hall-Effect Switches Features and Benefits ▪ 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 ...

Page 2

... Bulk, 500 pieces/bag A1155LLHLX-T 13-in. reel, 10 000 pieces/reel A1155LUA-T 2 Bulk, 500 pieces/bag A1156LLHLX-T 13-in. reel, 10 000 pieces/reel 2 A1156LUA-T Bulk, 500 pieces/bag A1157LLHLX-T 13-in. reel, 10 000 pieces/reel A1157LUA-T 2 Bulk, 500 pieces/bag A1158LLHLX-T 13-in. reel, 10 000 pieces/reel 2 A1158LUA-T Bulk, 500 pieces/bag ® 1 Contact Allegro for additional packing options ...

Page 3

A1150, A1152, A1153, A1155, A1156, A1157, and A1158 ELECTRICAL CHARACTERISTICS range; unless otherwise noted Characteristics Supply Voltage 1,2 Supply Current Supply Zener Clamp Voltage Supply Zener Clamp Current Reverse Supply Current Output Slew Rate 3 Chopping Frequency Power-Up Time 4,5 ...

Page 4

A1150, A1152, A1153, A1155, A1156, A1157, and A1158 may require derating at maximum conditions, see application information Thermal Characteristics Characteristic Package Thermal Resistance *Additional thermal information available on the Allegro website Symbol Test Conditions* Package LH, on 1-layer PCB with ...

Page 5

A1150, A1152, A1153, A1155, A1156, A1157, and A1158 A1152/A1153/A1155/A1156 Average Supply Current (Low) versus Temperature 7 5.5 5.0 -60 -40 - Ambient Temperature, T ...

Page 6

A1150, A1152, A1153, A1155, A1156, A1157, and A1158 A1150/A1152/A1153 Average Operate Point versus Temperature 110 100 -60 -40 - Ambient Temperature, T A1150/A1152/A1153 Average Release Point versus Temperature 105 95 85 ...

Page 7

A1150, A1152, A1153, A1155, A1156, A1157, and A1158 The A1150, A1152, A1155, and A1157 output, I after the magnetic field at the Hall sensor IC exceeds the oper- ate point threshold When the magnetic field is reduced to ...

Page 8

A1150, A1152, A1153, A1155, A1156, A1157, and A1158 V+ VCC A115x GND GND A ECU R SENSE (A) Low side sensing Figure 2. Typical application circuits Chopper Stabilization Technique When using Hall-effect technology, a limiting factor for switchpoint accuracy is ...

Page 9

A1150, A1152, A1153, A1155, A1156, A1157, and A1158 Power Derating The device must be operated below the maximum junction tem- perature of the device, T (max). Under certain combinations of J peak conditions, reliable operation may require derating supplied power ...

Page 10

A1150, A1152, A1153, A1155, A1156, A1157, and A1158 +0.12 2.98 –0.08 3 +0.10 2.90 –0. 10° REF 0.95 BSC For Reference Only; not for tooling use (reference DWG-2840) Dimensions in millimeters Dimensions exclusive of mold flash, gate burrs, ...

Page 11

A1150, A1152, A1153, A1155, A1156, A1157, and A1158 4.09 45° E 2.05 NOM 1.44 NOM +0.08 E 3.02 –0.05 1.02 MAX 1 14.99 ±0.25 +0.05 0.43 –0.07 Package UA, 3-Pin SIP +0.08 –0. 1.52 ±0.05 10° E Mold ...

Page 12

A1150, A1152, A1153, A1155, A1156, A1157, and A1158 Revision History Revision Rev. 3 Copyright ©2009-2011, Allegro MicroSystems, Inc. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec i fi ...

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