ALLEGRO A1101, A1102, A1103, A1104, A1106 User Manual

A1 101, A1 102, A1 103, A1 104, and A1 106

Continuous-T ime Switch Family

Features and Benefits

▪ Continuous-time operation

▫ Fast power-on time

▫ Low noise
▪ Stable operation over full operating temperature range
▪ Reverse battery protection
▪ Solid-state reliability
▪ Factory-programmed at end-of-line for optimum

performance

▪ Robust EMC performance
▪ High ESD rating
▪ Regulator stability without a bypass capacitor

Packages: 3 pin SOT23W (suffix LH), and
3 pin SIP (suffix UA)

Description

The Allegro® A1101-A1104 and A1106 Hall-effect switches
are next generation replacements for the popular Allegro
312x and 314x lines of unipolar switches. The A110x family,
produced with BiCMOS technology, consists of devices that
feature fast power-on time and low-noise operation. Device
programming is performed after packaging, to ensure increased
switchpoint accuracy by eliminating offsets that can be induced
by package stress. Unique Hall element geometries and low­offset amplifiers help to minimize noise and to reduce the
residual offset voltage normally caused by device overmolding,
temperature excursions, and thermal stress.

The A1101-A1104 and A1106 Hall-effect switches include
the following on a single silicon chip: voltage regulator,
Hall-voltage generator, small-signal amplifier, Schmitt
trigger, and NMOS output transistor. The integrated voltage
regulator permits operation from 3.8 to 24 V. The extensive
on-board protection circuitry makes possible a ±30 V absolute
maximum voltage rating for superior protection in automotive
and industrial motor commutation applications, without adding

Not to scale

VCC

Continued on the next page…

Functional Block Diagram

Regulator

To all subcircuits

Amp

Control

OffsetGain

Trim

VOUT

GND

A1101-DS, Rev. 4

A1101, A1102, A1 103,
A1104, and A1106

Description (continued)

external components. All devices in the family are identical except

for magnetic switchpoint levels.

The small geometries of the BiCMOS process allow these devices

to be provided in ultrasmall packages. The package styles available

Selection Guide

Part Number Packing

A1101ELHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1101EUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

A1101LLHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1101LUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

A1102ELHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1102EUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

A1102LLHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1102LUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

A1103ELHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1103EUA-T

A1103LLHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1103LUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

A1104ELHLT-T27-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1104EUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

A1104LLHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1104LUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

A1106ELHLT-T

A1106EUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

A1106LLHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1106LUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

2

Contact Allegro for additional packing options.

2

Variant is in production but has been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of the variant is currently
restricted to existing customer applications. The variant should not be purchased for new design applications because obsolescence in the near future
is probable. Samples are no longer available. Status change: November 1, 2008.

2

Bulk, 500 pieces/bag 3-pin SIP through hole

2

7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

1

Mounting Ambient, T

Continuous-T ime Switch Family

provide magnetically optimized solutions for most applications.
Package LH is an SOT23W, a miniature low-profile surface-mount
package, while package UA is a three-lead ultramini SIP for through­hole mounting. Each package is lead (Pb) free, with 100% matte
tin plated leadframes.

A

–40ºC to 85ºC

–40ºC to 150ºC

–40ºC to 85ºC

–40ºC to 150ºC

–40ºC to 85ºC

–40ºC to 150ºC

–40ºC to 85ºC

–40ºC to 150ºC

–40ºC to 85ºC

–40ºC to 150ºC

BRP (Min) BOP (Max)

10 175

60 245

150 355

25 450

160 430

Absolute Maximum Ratings

Characteristic Symbol Notes Rating Units

Supply Voltage V

Reverse Supply Voltage V

Output Off Voltage V

Reverse Output Voltage V

Output Current I

Magnetic Flux Density B Unlimited G

Operating Ambient Temperature T

Maximum Junction Temperature TJ(max) 165 ºC

Storage Temperature T

CC

RCC

OUT

ROUT

OUTSINK

A

stg

Range E –40 to 85 ºC

Range L –40 to 150 ºC

30 V

–30 V

30 V

–0.5 V

25 mA

–65 to 170 ºC

Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

2

A1101, A1102, A1 103,
A1104, and A1106

ELECTRICAL OPERATING CHARACTERISTICS over full operating voltage and ambient temperature ranges, unless otherwise noted

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Supply Voltage

1

Output Leakage Current I

Output On Voltage V

Power-On Time

Output Rise Time

Output Fall Time

2

3

3

Supply Current

Reverse Battery Current I

Supply Zener Clamp Voltage V

Supply Zener Current

1

Maximum voltage must be adjusted for power dissipation and junction temperature, see Power Derating section.

2

For VCC slew rates greater than 250 V/s, and TA = 150°C, the Power-On Time can reach its maximum value.

3

CS =oscilloscope probe capacitance.

4

Maximum current limit is equal to the maximum I

4

V

CC

OUTOFF

OUT(SAT)IOUT

t

PO

t

r

t

f

I

CCON

I

CCOFF

RCC

Z

I

Z

Operating, TJ < 165°C 3.8 – 24 V

V

OUT

Slew rate (dVCC/dt) < 2.5 V/s, B > BOP + 5 G or
B < BRP – 5 G

VCC = 12 V, R

VCC = 12 V, R

B > B

B < B

V

RCC

ICC = 10.5 mA; TA = 25°C 32 – – V

VZ = 32 V; TA = 25°C – – 10.5 mA

CC(max)

= 24 V, B < B

= 20 mA, B > B

OP

RP

= –30 V – – –10 mA

+ 3 mA.

Continuous-T ime Switch Family

RP

OP

= 820 , CS = 12 pF – – 400 ns

LOAD

= 820 , CS = 12 pF – – 400 ns

LOAD

––10A

– 215 400 mV

––4s

– 4.1 7.5 mA

– 3.8 7.5 mA

DEVICE QUALIFICATION PROGRAM

Contact Allegro for information.

EMC (Electromagnetic Compatibility) REQUIREMENTS

Contact Allegro for information.

Package LH

GND

3

VCC

Terminal List

Name Description

VCC Connects power supply to chip 1 1

VOUT Output from circuit 2 3

GND Ground 3 2

VOUT

Package UA, 3-pin SIP

2

VCC

GND

Number

Package LH Package UA

VOUT

Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

3

A1101, A1102, A1 103,
A1104, and A1106

Continuous-T ime Switch Family

MAGNETIC OPERATING CHARACTERISTICS

1

over full operating voltage and ambient temperature ranges, unless otherwise noted

Characteristic Symbol Test Conditions Min. Typ. Max. Units

A1101

A1102

Operate Point B

Release Point B

Hysteresis B

1

Magnetic flux density, B, is indicated as a negative value for north-polarity magnetic fields, and as a positive value for south-polarity magnetic fields.

This so-called algebraic convention supports arithmetic comparison of north and south polarity values, where the relative strength of the field is indicated
by the absolute value of B, and the sign indicates the polarity of the field (for example, a –100 G field and a 100 G field have equivalent strength, but
opposite polarity).

OP

RP

HYS

A1103

A1104

A1106

A1101

A1102

A1103

A1104

A1106

A1101

A1102

A1103

A1104

A1106

TA = 25°C 50 100 160 G

Operating Temperature Range 30 100 175 G

= 25°C 130 180 230 G

T

A

Operating Temperature Range 115 180 245 G

TA = 25°C 220 280 340 G

Operating Temperature Range 205 280 355 G

TA = 25°C 70 – 350 G

Operating Temperature Range 35 – 450 G

TA = 25°C 280 340 400 G

Operating Temperature Range 260 340 430 G

TA = 25°C 10 45 130 G

Operating Temperature Range 10 45 145 G

TA = 25°C 75 125 175 G

Operating Temperature Range 60 125 190 G

TA = 25°C 165 225 285 G

Operating Temperature Range 150 225 300 G

TA = 25°C 50 – 330 G

Operating Temperature Range 25 – 430 G

TA = 25°C 180 240 300 G

Operating Temperature Range 160 240 330 G

TA = 25°C 20 55 80 G

Operating Temperature Range 20 55 80 G

TA = 25°C 30 55 80 G

Operating Temperature Range 30 55 80 G

TA = 25°C 30 55 80 G

Operating Temperature Range 30 55 80 G

TA = 25°C 20 55 – G

Operating Temperature Range 20 55 – G

TA = 25°C 70 105 140 G

Operating Temperature Range 70 105 140 G

Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

4