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Related Links:

Datasheets:
A1301 and A1302: Continuous-Time Ratiometric Linear Hall Effect Sensors (PDF)

Selection Guides:
Hall-Effect Sensors,

Linear Hall-Effect Sensors

when this product is updated

Technical Publications:
A1302 Provides Advance Drop-In Replacements for A3503 Devices (PDF)

Press Releases:
A1301 and A1302: Allegro MicroSystems, Inc. Announces Improvements to Family of Continuous-Time Linears

A1301 and A1302
Continuous-Time Ratiometric Linear Hall Effect Sensors

Replacement Device Characteristics Table

Device		A130x Characteristics
		Typical Sensitivity	Operating Voltage
Legacy	Replacement		Min	Max
-	A1301	2.5 mV/G	4.5 V	6 V
UGN3503	A1302	1.3 mV/G	4.5 V	6 V

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

Description

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 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.

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.

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
A1301ELHLT-T	3-lead SOT	Yes	view data	-40 °C to  85 °C	not for new design	samples not available
A1301EUA-T	3-pin SIP	Yes	view data	-40 °C to  85 °C
A1301KLHLT-T	3-lead SOT	Yes	view data	-40 °C to  125 °C
A1301KUA-T	3-pin SIP	Yes	view data	-40 °C to  125 °C
A1302ELHLT-T	3-lead SOT	Yes	view data	-40 °C to  85 °C
A1302EUA-T	3-pin SIP	Yes	view data	-40 °C to  85 °C
A1302KLHLT-T	3-lead SOT	Yes	view data	-40 °C to  125 °C
A1302KUA-T	3-pin SIP	Yes	view data	-40 °C to  125 °C

Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.