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datasheet A1301-2

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A1301 and A1302
Continuous-Time Ratiometric Linear Hall Effect Sensor ICs
Features and Benefits

Description

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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.

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 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.

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

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.

Not to scale

Functional Block Diagram
V+

To all subcircuits

Amp

Gain

Filter

VCC

Out

Offset

CBYPASS
Trim
Control

GND

A1301-DS, Rev. 18

VOUT

Continuous-Time Ratiometric
Linear Hall Effect Sensor ICs

A1301 and
A1302

Selection Guide
Part Number

Package

Ambient, TA

SIP

Packing*

–40ºC to 85ºC

A1301EUA-T

Bulk, 500 pieces/bag

A1301KLHLT-T

7-in. tape and reel, 3000 pieces/reel

A1301KUA-T

Bulk, 500 pieces/bag

A1302ELHLT-T

7-in. tape and reel, 3000 pieces/reel

Surface Mount

A1302KLHLT-T

7-in. tape and reel, 3000 pieces/reel

Surface Mount

A1302KUA-T

Bulk, 500 pieces/bag

Surface Mount
SIP

SIP

Sensitivity (Typical)
2.5 mV/G

–40ºC to 125ºC
–40ºC to 85ºC

1.3 mV/G

–40ºC to 125ºC

*Contact Allegro™ for additional packing options.

Absolute Maximum Ratings
Characteristic

Symbol

Notes

Rating...
Description
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. 18
Features and Benefits
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
C
Out
Offset
Trim
Control
Gain
V+
Filter
C
BYPASS
Not to scale
Packages: 3-pin SOT23W (suffix LH), and
3-pin SIP (suffix UA)
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