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

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 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 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 wellsuited for industrial applications over extended temperature ranges, from -40°C to 125°C.

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  • 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

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 leadframe.

 UA/LH Combination

Replacement Device Characteristics Table

DeviceA130x Characteristics
Typical SensitivityOperating Voltage
LegacyReplacementMinMax

-

A1301

2.5 mV/G

4.5 V

6 V

UGN3503

A1302

1.3 mV/G

4.5 V

6 V

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Product Image Functional Block Diagram

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
A1301EUA-T 3-lead SIP -40°C to 85°C Yes View Data Contact your
local sales rep
Check stock
A1301KLHLT-T 3-lead SOT -40°C to 125°C Yes View Data Contact your
local sales rep
Check stock
A1301KUA-T 3-lead SIP -40°C to 125°C Yes View Data Contact your
local sales rep
Check stock
A1302ELHLT-T 3-lead SOT -40°C to 85°C Yes View Data Contact your
local sales rep
Check stock
A1302KLHLT-T 3-lead SOT -40°C to 125°C Yes View Data Contact your
local sales rep
Check stock
A1302KUA-T 3-lead SIP -40°C to 125°C Yes View Data Contact your
local sales rep
Check stock

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.

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