A1302KUATI-T - ALLEGRO MICROSYSTEMS

NOTE: For detailed information on purchasing options, contact your

local Allegro field applications engineer or sales representative.

Allegro MicroSystems, LLC reserves the right to make, from time to time, revisions to the anticipated product life cycle plan

for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand.

The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC. assumes no

responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.

Recommended Substitutions: A1308

Continuous-Time Ratiometric Linear Hall-Effect Sensor ICs

A1301 and A1302

For existing customer transition, and for new customers or new appli-

cations, contact Allegro Sales.

Date of status change: August 30, 2017

This device is no longer in production. The device should not be

purchased for new design applications. Samples are no longer available.

Discontinued Product

The A1301 and A1302 are continuous-time, ratiometric, linear

Hall-effect sensor ICs. 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 circuit, a linear amplifier, and a CMOS Class A

output structure. Integrating the Hall circuit 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 adjustments 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. They are lead (Pb) free (suffix, –T) with

100% matte tin plated leadframes.

A1301-DS, Rev. 23

MCO-0000597

• 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

Continuous-Time Ratiometric Linear Hall Effect Sensor ICs

Functional Block Diagram

A1301 and A1302

Amp

GND

VOUT

VC To all subcircuits

Out

Offset

Tri m

Control

Gain

V+

Filter

CBYPASS

Not to scale

Packages:

FEATURES AND BENEFITS DESCRIPTION

3-Pin SOT23W (suffix LH) 3-Pin SIP (suffix UA)

February 14, 2019

Continuous-Time Ratiometric

Linear Hall Effect Sensor ICs

A1301 and

A1302

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Selection Guide

Part Number Packing* Package Ambient, TASensitivity (Typical)

A1301EUA-T Bulk, 500 pieces/bag SIP –40ºC to 85ºC

2.5 mV/G

A1301KLHLT-T 7-in. reel, 3000 pieces/reel Surface Mount

–40ºC to 125ºCA1301KLHLX-T 13-in. reel, 10000 pieces/reel Surface Mount

A1301KUA-T Bulk, 500 pieces/bag SIP

A1302ELHLT-T 7-in. reel, 3000 pieces/reel Surface Mount –40ºC to 85ºC

1.3 mV/G

A1302ELHLX-T 13-in. reel, 10000 pieces/reel Surface Mount

A1302KLHLT-T 7-in. reel, 3000 pieces/reel Surface Mount

–40ºC to 125ºCA1302KLHLX-T 13-in. reel, 10000 pieces/reel Surface Mount

A1302KUA-T Bulk, 500 pieces/bag SIP

*Contact Allegro™ for additional packing options.

Absolute Maximum Ratings

Characteristic Symbol Notes Rating Units

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 Ambient Temperature TA

Range E –40 to 85 ºC

Range K –40 to 125 ºC

Maximum Junction Temperature TJ(max) 165 ºC

Storage Temperature Tstg –65 to 170 ºC

SPECIFICATIONS

Terminal List

Symbol Number Description

Package LH Package UA

VCC 1 1 Connects power supply to chip

VOUT 2 3 Output from circuit

GND 3 2 Ground

Package LH SOT23W Pin-out Diagram Package UA, 3-Pin SIP Pin-out Diagram

2 31

Continuous-Time Ratiometric

Linear Hall Effect Sensor ICs

A1301 and

A1302

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

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 – 3 5 µs

Output Resistance ROUT ISINK ≤ 1 mA, ISOURCE ≥ –1 mA –25Ω

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 ∆VCC1ΔVOUTQ(V) TA = 25°C – – ±3.0 %

Magnetic Sensitivity Error with

respect to ∆VCC2ΔSens(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(ΔTA)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(ΔTA)

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.

Continuous-Time Ratiometric

Linear Hall Effect Sensor ICs

A1301 and

A1302

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

CHARACTERISTIC DEFINITIONS

Quiescent Output Voltage

In the quiescent state (no significant 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 ther-

mal considerations, there is a tolerance on the quiescent output

voltage, ∆VOUTQ, which is a function of both ∆VCC and ∆TA. For

purposes of specification, the quiescent output voltage as a func-

tion of temperature, ∆VOUTQ(∆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, perpen-

dicular 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 sensitiv-

ity 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 sen-

sitivity, 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 mea-

sured and defined as:

and output symmetry as:

∆VOUTQ(∆ΤΑ)Sens

(25ºC)

OUTQ(ΤΑ)

OUTQ(25ºC)

–

=(1)

OUT(–B)

OUT(+B)

Sens

–

∆Sens(∆ΤΑ)

Sens

(ΤΑ)

Sens

(25ºC)

Sens(25ºC)

–

=× 100%

(2)

(3)

5 V

OUTQ(V

)

OUTQ(5V)

∆V

OUTQ(∆V)

=× 100%

(4)

VCC 5 V

=× 100%

∆Sens(∆V)

Sens(VCC)Sens(5V)(5)

=× 100%

Lin+

2 (VOUT(+B½) – VVOUTQ )

–

VOUT(+B) VOUTQ (6)

=× 100%

Lin–

2(VOUT(–B½) – VOUTQ)

–

VOUT(–B) VOUTQ

(7)

–

=× 100%

Sym

VOUT(+B)

VOUTQ – VOUT(–B)

VOUTQ (8)

Continuous-Time Ratiometric

Linear Hall Effect Sensor ICs

A1301 and

A1302

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

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

Continuous-Time Ratiometric

Linear Hall Effect Sensor ICs

A1301 and

A1302

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

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

TYPICAL CHARACTERISTICS CONTINUED

(30 pieces, 3 fabrication lots)

Continuous-Time Ratiometric

Linear Hall Effect Sensor ICs

A1301 and

A1302

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Figure 1: Package LH, 3-Pin; (SOT-23W)

For Reference Only – Not for Tooling Use

(Reference DWG-2840)

Dimensions in millimeters–NOT TO SCALE

Dimensions exclusive of mold ﬂash, gate burrs, and dambar protrusions

Exact case and lead conﬁguration at supplier discretion within limits shown

Reference land pattern layout

All pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary

to meet application process requirements and PCB layout tolerances

Active Area Depth, 0.28 mm

Hall elements, not to scale

= Last three digits of device part numberN

Standard Branding Reference View

NNN

Branding scale and appearance at supplier discretion

Seating Plane

Gauge Plane PCB Layout Reference View

0.55 REF

0.25 BSC

0.95 BSC

0.95

1.00

0.70

2.40

Branded Face

2.90+0.10

–0.20

4°±4°

8X 10° REF

0.180+0.020

–0.053

0.05 +0.10

–0.05

0.25 MIN

1.91+0.19

–0.06

2.98+0.12

–0.08

1.00 ±0.13

0.40 ±0.10

1.49

0.96

CUSTOMER OUTLINE DRAWINGS

Continuous-Time Ratiometric

Linear Hall Effect Sensor ICs

A1301 and

A1302

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Figure 2: Package UA, 3-Pin SIP

For Reference Only – Not for Tooling Use

(Reference DWG-9065)

Dimensions in millimeters – NOT TO SCALE

Dimensions exclusive of mold ﬂash, gate burrs, and dambar protrusions

Exact case and lead conﬁguration at supplier discretion within limits shown

231

1.27 NOM

1.02 MAX 0.51 MAX

0.79 REF

2.04

1.44 E

Branding scale and appearance at supplier discretion

Hall element, not to scale

Mold Ejector

Pin Indent

Branded

Face

4.09+0.08

–0.05

0.41 +0.03

–0.06

3.02+0.08

–0.05

0.43+0.05

–0.07

14.99 ±0.25

Dambar removal protrusion (6X)

Gate and tie bar burr area

Active Area Depth, 0.50 mm REF

NNN

Standard Branding Reference View

= Supplier emblem

= Last three digits of device part numberN

2 X 45°

45°

3 X 10°

1.52 ±0.05

Continuous-Time Ratiometric

Linear Hall Effect Sensor ICs

A1301 and

A1302

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

For the latest version of this document, visit our website:

www.allegromicro.com

Revision History

Revision Revision Date Description of Revision

18 April 26, 2013 Update UA package drawing

19 January 1, 2015 Add LX option to Selection Guide

20 July 13, 2015 Corrected LH package Active Area Depth value

21 December 1, 2015 Updated product status to “Not for New Design”

22 December 5, 2016 Updated product status to “Last Time Buy”

23 February 14, 2019 Updated product status to “Discontinued”

Allegro MicroSystems, LLC reserves the right to make, from time to time, such departures from the detail specifications as may be required to

permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that

the information being relied upon is current.

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of

Allegro’s product can reasonably be expected to cause bodily harm.

The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no responsibility for its

use; nor for any infringement of patents or other rights of third parties which may result from its use.

Copies of this document are considered uncontrolled documents.