A1301EUA - Allegro MicroSystems, Inc.

A1301 and A1302

A1301-DS, Rev. 2 Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

AB SO LUTE MAX I MUM RAT INGS

Supply Voltage, VCC ............................................ 8 V

Output Voltage, VOUT .......................................... 8 V

Reverse-Supply Voltage, VRCC ....................... –0.1 V

Reverse-Output Voltage, VROUT ..................... –0.1 V

Output Sink Current, IOUT ............................. 10 mA

Operating Temperature

Ambient, TA, Range E.................. –40ºC to 85ºC

Ambient, TA, Range K ............... –40ºC to 125ºC

Maximum Junction, TJ(max)........................165ºC

Storage Temperature, TS.................. –65ºC to 170ºC

Low-noise output

Fast power-on time

Ratiometric rail-to-rail output

4.5 to 6.0 V operation

Solid-state reliability

Factory-programmed at end-of-line for optimum performance

Robust ESD performance

The A1301 and A1302 are continuous-time, ratiometric, linear Hall-effect sensors.

They are optimized to accurately provide a voltage output that is proportional to

an applied magnetic field. These devices have a quiescent output voltage that is

50% of the supply voltage. Two output sensitivity options are provided: 2.5 mV/G

typical for the A1301, and 1.3 mV/G typical for the A1302.

The Hall-effect integrated circuit included in each device includes a Hall sensing

element, a linear amplifier, and a CMOS Class A output structure. Integrating the

Hall sensing element and the amplifier on a single chip minimizes many of the

problems normally associated with low voltage level analog signals.

High precision in output levels is obtained by internal gain and offset trim adjust-

ments made at end-of-line during the manufacturing process.

These features make the A1301 and A1302 ideal for use in position sensing

systems, for both linear target motion and rotational target motion. They are well-

suited for industrial applications over extended temperature ranges, from –40°C to

125°C.

Two device package types are available: LH, a 3-pin SOT23W type for surface

mount, and UA, a 3-pin ultramini SIP for through-hole mount. Each package is

available in a lead (Pb) free version (suffix, –T) with 100% matte tin plated lead-

frame.

Continuous-Time Ratiometric Linear Hall Effect Sensors

Features and Benefits

Package UA, 3-pin SIP

1. VCC

2. GND

3. VOUT

Package LH, 3-pin Surface Mount

1. VCC

2. VOUT

3. GND

A1301-DS, Rev. 2 Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

Continuous-Time Ratiometric Linear Hall Effect Sensors

A1301 and A1302

Functional Block Diagram

Amp

GND

VOUT

VCC

Out

Offset

Trim

Control

Gain

V+

Voltage

Regulator

Filter

CBYPASS

Terminal List

Symbol Description Number

Package LH Package UA

VCC Connects power supply to chip 1 1

VOUT Output from circuit 2 3

GND Ground 3 2

Part Number Pb-free Packing* Package Ambient, TASensitivity (Typical)

A1301ELHLT – 7-in. tape and reel, 3000 pieces/reel Surface Mount

–40ºC to 85ºC

2.5 mV/G

A1301ELHLT-T Yes

A1301EUA – Bulk, 500 pieces/bag SIP

A1301EUA-T Yes

A1301KLHLT – 7-in. tape and reel, 3000 pieces/reel Surface Mount

–40ºC to 125ºC

A1301KLHLT-T Yes

A1301KUA – Bulk, 500 pieces/bag SIP

A1301KUA-T Yes

A1302ELHLT – 7-in. tape and reel, 3000 pieces/reel Surface Mount

–40ºC to 85ºC

1.3 mV/G

A1302ELHLT-T Yes

A1302EUA – Bulk, 500 pieces/bag SIP

A1302EUA-T Yes

A1302KLHLT – 7-in. tape and reel, 3000 pieces/reel Surface Mount

–40ºC to 125ºC

A1302KLHLT-T Yes

A1302KUA – Bulk, 500 pieces/bag SIP

A1302KUA-T Yes

Product Selection Guide

*Contact Allegro for additional packing options.

A1301-DS, Rev. 2 Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

Continuous-Time Ratiometric Linear Hall Effect Sensors

A1301 and A1302

DEVICE CHARACTERISTICS over operating temperature range, TA, and VCC = 5 V, unless otherwise noted

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Electrical Characteristics

Supply Voltage VCC Running, TJ < 165°C 4.5 – 6 V

Supply Current ICC Output open – – 11 mA

Output Voltage VOUT(High) ISOURCE = –1 mA, Sens = nominal 4.65 4.7 – V

VOUT(Low) ISINK = 1 mA, Sens = nominal – 0.2 0.25 V

Output Bandwidth BW – 20 – kHz

Power-On Time tPO

VCC(min) to 0.95 VOUT; B = ±1400 G;

Slew rate = 4.5 V/µs to 4.5 V/100 ns –35µs

Output Resistance ROUT ISINK ≤ 1 mA, ISOURCE ≥ –1 mA – 2 5 Ω

Wide Band Output Noise, rms VOUTN

External output low pass filter ≤ 10 kHz;

Sens = nominal – 150 – µV

Ratiometry

Quiescent Output Voltage Error

with respect to ∆VCC1∆VOUTQ(V) TA = 25°C – – ±3.0 %

Magnetic Sensitivity Error with

respect to ∆VCC2∆Sens(V) TA = 25°C – – ±3.0 %

Output

Linearity Lin TA = 25°C – – ±2.5 %

Symmetry Sym TA = 25°C – – ±3.0 %

Magnetic Characteristics

Quiescent Output Voltage VOUTQ B = 0 G; TA = 25°C 2.4 2.5 2.6 V

Quiescent Output Voltage over

Operating Temperature Range VOUTQ(∆TA)B = 0 G 2.2 – 2.8 V

Magnetic Sensitivity Sens A1301; TA = 25°C 2.0 2.5 3.0 mV/G

A1302; TA = 25°C 1.0 1.3 1.6 mV/G

Magnetic Sensitivity over

Operating Temperature Range Sens(∆TA)

A1301 1.8 – 3.2 mV/G

A1302 0.85 – 1.75 mV/G

1Refer to equation (4) in Ratiometric section on page 4.

2Refer to equation (5) in Ratiometric section on page 4.

A1301-DS, Rev. 2 Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

Continuous-Time Ratiometric Linear Hall Effect Sensors

A1301 and A1302

Characteristic Definitions

Quiescent Output Voltage. In the quiescent state (no sig-

nificant magnetic field: B = 0), the output, VOUTQ, equals one

half of the supply voltage, VCC, throughout the entire operating

ranges of VCC and ambient temperature, TA. Due to internal

component tolerances and thermal considerations, however,

there is a tolerance on the quiescent output voltage, ∆V

OUTQ,

which is a function of both ∆V

CC and ∆TA. For purposes of speci-

fication, the quiescent output voltage as a function of tempera-

ture, ∆V

OUTQ(∆TA), is defined as:

where Sens is in mV/G, and the result is the device equivalent

accuracy, in gauss (G), applicable over the entire operating tem-

perature range.

Sensitivity. The presence of a south-polarity (+B) magnetic

field, perpendicular to the branded face of the device package,

increases the output voltage, VOUT, in proportion to the magnetic

field applied, from VOUTQ toward the VCC rail. Conversely, the

application of a north polarity (–B) magnetic field, in the same

orientation, proportionally decreases the output voltage from its

quiescent value. This proportionality is specified as the magnetic

sensitivity of the device and is defined as:

The stability of the device magnetic sensitivity as a function of

ambient temperature, ∆ Sens (∆TA) (%) is defined as:

Ratiometric. The A1301 and A1302 feature a ratiometric

output. This means that the quiescent voltage output, VOUTQ,

and the magnetic sensitivity, Sens, are proportional to the supply

voltage, VCC.

The ratiometric change (%) in the quiescent voltage output is

defined as:

and the ratiometric change (%) in sensitivity is defined as:

Linearity and Symmetry. The on-chip output stage is

designed to provide linear output at a supply voltage of 5 V.

Although the application of very high magnetic fields does not

damage these devices, it does force their output into a nonlinear

region. Linearity in percent is measured and defined as:

and output symmetry as:

∆VOUTQ(∆ΤΑ)Sens(25ºC)

VOUTQ(ΤΑ)VOUTQ(25ºC)

–

=(1)

VOUT(–B) VOUT(+B)

Sens

–

∆Sens(∆ΤΑ)

Sens(ΤΑ)Sens(25ºC)

Sens(25ºC)

–

=× 100%

(2)

(3)

∆V

OUTQ(V

)

∆V

OUTQ(5V)

∆V

OUTQ(∆V)

=× 100%

(4)

VCC 5V

=× 100%

∆Sens(∆V)

Sens(VCC)Sens(5V)

(5)

=× 100%

Lin+

2 (VOUT(+B½) –V

VOUTQ )

–

VOUT(+B) VOUTQ

(6)

=× 100%

Lin–

2(VOUT(–B½) –V

OUTQ)

–

VOUT(–B) VOUTQ

(7)

–

=× 100%

Sym

VOUT(+B)

VOUTQ –V

OUT(–B)

VOUTQ

(8)

A1301-DS, Rev. 2 Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

Continuous-Time Ratiometric Linear Hall Effect Sensors

A1301 and A1302

Typical Characteristics

(30 pieces, 3 fabrication lots)

Continued on the next page...

2.35

2.40

2.45

2.50

2.55

2.60

2.65

–50

–25 0 25 50 75 100 125 150

1.24

1.26

1.28

1.30

1.32

1.34

1.36

1.38

1.40

-50

-25 0 25 50 75 100 125 150

2.40

2.45

2.50

2.55

2.60

–50 –25 0 25 50 75 100 125 150

2.40

2.45

2.50

2.55

2.60

–50 –25 0 25 50 75 100 125 150

4.5 5.0 5.5 6.0

LH Package

UA Package

LH Package

UA Package

1301 Device Sensitivity vs. Ambient Temperature 1302 Device Sensitivity vs. Temperature

Temperature (°C) Temperature (°C)

1301 Device VOUTQ vs. Ambient Temperature 1302 Device VOUTQ vs. Ambient Temperature

1301 Device Sensitivity vs. Supply Voltage 1302 Device Sensitivity vs. Supply Voltage

Supply Voltage (V)

Temperature (°C)

Sensitivity (mV/G)

Output Voltage (V)

Sensitivity (mV/G)

1.5

2.0

2.5

3.0

3.5

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

A1301-DS, Rev. 2 Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

Continuous-Time Ratiometric Linear Hall Effect Sensors

A1301 and A1302

Typical Characteristics, continued

(30 pieces, 3 fabrication lots)

1301 Device VOUTQ vs. Supply Voltage

4.5 5.0 5.5 6.0 1.5

2.0

2.5

3.0

3.5

4.5 5.0 5.5 6.0

4.5

5.0 5.5 6.0

4.5

5.0 5.5 6.0

99.0

99.1

99.2

99.3

99.4

99.5

99.6

99.7

99.8

99.9

100.0

4.5 5.0 5.5 6.0

99.5

99.6

99.7

99.8

99.9

100.0

100.1

100.2

100.3

100.4

100.5

4.5 5.0 5.5 6.0

Supply Voltage (V)

LIN–

LIN+

LIN–

LIN+

99.6

99.7

99.8

99.9

100.0

99.8

99.9

100.0

100.1

100.2

100.3

100.4

1302 Device VOUTQ vs. Supply Voltage

1301 Device Symmetry vs. Supply Voltage 1302 Device Symmetry vs. Supply Voltage

1301 Device LIN+ and LIN– vs. Supply Voltage 1302 Device LIN+ and LIN– vs. Supply Voltage

Output Voltage (V)

Linearity (%)

Symmetry (%)

Supply Voltage (V) Supply Voltage (V)

Supply Voltage (V)

1.5

2.0

2.5

3.0

3.5

A1301-DS, Rev. 2 Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

Continuous-Time Ratiometric Linear Hall Effect Sensors

A1301 and A1302

Package LH, 3-Pin; (SOT-23W)

2.40

BSC

.094

1.00

BSC

.039

0.70

BSC

.028

3.10

2.90

.122

.114

2.10

1.85

.083

.073

3.00

2.70

.118

.106

0.55

REF

.022

1.49

NOM

.059

0.28

NOM

.011

0.96

NOM

.038

0.95

BSC

.037

0.95

BSC

.037

0.25

MIN

.010

0.15

0.00

.006

.000

1.13

0.87

.045

.034

0.20

0.13

.008

.005

8º

0º

0.50 .020

.012

0.30

0.25

BSC

.010

Gauge Plane

Seating Plane

Dimensions in millimeters

U.S. Customary dimensions (in.) in brackets, for reference only

AHall element

BActive Area Depth 0.28 [.011]

Fits SC–59A Solder Pad Layout

Package UA, 3-Pin; (TO-92)

.164

.159

4.17

4.04

.122

.117

3.10

2.97

.062

.058

1.57

1.47

.017

.014

0.44

0.35

.019

.014

0.48

0.36

.640

.600

16.26

15.24

.085

MAX

2.16

.050

BSC

1.27

.031

REF

0.79

.0195

NOM

0.50

.0805

NOM

2.04

1.44

.0565

NOM

45°

BSC

45°

BSC

Dimensions in inches

Metric dimensions (mm) in brackets, for reference only

231

Dambar removal protrusion

Hall element

A1301-DS, Rev. 2 Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

Continuous-Time Ratiometric Linear Hall Effect Sensors

A1301 and A1302

The products described herein are manufactured under one or more of

the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889;

5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894;

5,694,038; 5,729,130; 5,917,320; and other patents pending.

Allegro MicroSystems, Inc. reserves the right to make, from time to

time, such de par tures from the detail spec i fi ca tions as may be required

to permit improvements in the per for mance, reliability, or manufactur-

ability of its products. Before placing an order, the user is cautioned to

verify that the information being relied upon is current.

Allegro products are not authorized for use as critical components in

life-support devices or sys tems without express written approval.

The in for ma tion in clud ed herein is believed to be ac cu rate and reliable.

How ev er, Allegro MicroSystems, Inc. assumes no re spon si bil i ty for its

use; nor for any in fringe ment of patents or other rights of third parties

which may result from its use.