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Hall effect unipolar switch Allegro A1120LUA-T featuring Schmitt trigger and dynamic offset cancellation for operation

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Hall effect unipolar switch Allegro A1120LUA-T featuring Schmitt trigger and dynamic offset cancellation for operation

Operating Current : 4mA

Operating Temperature : -40℃~+150℃

Voltage - Supply : 3V~24V

Description : TO-92S Switches (Solid State) RoHS

Mfr. Part # : A1120LUA-T

Model Number : A1120LUA-T

Package : TO-92S

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Product Overview

The A1120, A1121, A1122, A1123, and A1125 are highly temperature-stable and stress-resistant Hall-effect unipolar switches designed for operation in extended temperature ranges up to 150C. Featuring dynamic offset cancellation for superior high-temperature performance, these ICs integrate a voltage regulator, Hall-voltage generator, amplifier, chopper stabilization, Schmitt trigger, and a short-circuit protected open-drain output. They operate from supply voltages of 3 to 24 V, offering flexibility for 3 V applications or enhanced protection against transients. The A1120-A1123 activate with a sufficient south pole field, while the A1125 is complementary, deactivating with a south pole. Available in surface-mount (LH) and through-hole (UA) packages, all units are lead (Pb) free with matte-tin plating.

Product Attributes

Brand: Allegro MicroSystems
Certifications: AEC-Q100 automotive qualified
Material: Lead (Pb) free with 100% matte-tin-plated leadframe
Package Styles: 3-pin SOT23W (LH), 3-pin SIP (UA)

Technical Specifications

Part Number	Mounting	Ambient Temp (C)	Switchpoints (Typ.) (G)	Output In South (Positive) Magnetic Field
A1120ELHLX-T	3-pin SOT23W surface mount	40 to 85	35	On (logic low)
A1120LLHLX-T	3-pin SOT23W surface mount	40 to 150	35	On (logic low)
A1120EUA-T	3-pin SIP through hole	40 to 85	35	On (logic low)
A1120LUA-T	3-pin SIP through hole	40 to 150	35	On (logic low)
A1121ELHLX-T	3-pin SOT23W surface mount	40 to 85	95	On (logic low)
A1121LLHLX-T	3-pin SOT23W surface mount	40 to 150	95	On (logic low)
A1121EUA-T	3-pin SIP through hole	40 to 85	95	On (logic low)
A1121LUA-T	3-pin SIP through hole	40 to 150	95	On (logic low)
A1122ELHLX-T	3-pin SOT23W surface mount	40 to 85	150	On (logic low)
A1122LLHLX-T	3-pin SOT23W surface mount	40 to 150	150	On (logic low)
A1122EUA-T	3-pin SIP through hole	40 to 85	150	On (logic low)
A1122LUA-T	3-pin SIP through hole	40 to 150	150	On (logic low)
A1123LLHLX-T	3-pin SOT23W surface mount	40 to 150	280	On (logic low)
A1123LUA-T	3-pin SIP through hole	40 to 150	280	On (logic low)
A1125ELHLX-T	3-pin SOT23W surface mount	40 to 85	35	Off (logic high)
A1125LLHLX-T	3-pin SOT23W surface mount	40 to 150	35	Off (logic high)
A1125EUA-T	3-pin SIP through hole	40 to 85	35	Off (logic high)
A1125LUA-T	3-pin SIP through hole	40 to 150	35	Off (logic high)

Characteristic	Symbol	Test Conditions	Min.	Typ.	Max.	Unit
Forward Supply Voltage	VCC	Operating, TJ < 165C	3		24	V
Output Leakage Current	IOUTOFF	A1120-A1123, VOUT = 24 V, B < BRP			10	A
Output Leakage Current	IOUTOFF	A1125, VOUT = 24 V, B > BOP			10	A
Output Saturation Voltage	VOUT(SAT)	A1120-A1123, IOUT = 20 mA, B > BOP		185	500	mV
Output Saturation Voltage	VOUT(SAT)	A1125, IOUT = 20 mA, B < BRP		185	500	mV
Output Current Limit	IOM	A1120-A1123, B > BOP	30		60	mA
Output Current Limit	IOM	A1125, B < BRP	30		60	mA
Power-On Time	tPO	VCC > 3.0 V, B < BRP(min) / B > BOP(max) + 10 G			25	s
Chopping Frequency	fC			800		kHz
Output Rise Time	tr	RL = 820 , CS = 20 pF		0.2	2	s
Output Fall Time	tf	RL = 820 , CS = 20 pF		0.1	2	s
Supply Current (ON)	ICC(ON)	A1120-A1123, VCC = 12 V, B > BOP			4	mA
Supply Current (ON)	ICC(ON)	A1125, VCC = 12 V, B < BRP			4	mA
Supply Current (OFF)	ICC(OFF)	A1120-A1123, VCC = 12 V, B < BRP			4	mA
Supply Current (OFF)	ICC(OFF)	A1125, VCC = 12 V, B > BOP			4	mA
Reverse Supply Current	IRCC	VRCC = 30 V			5	mA
Supply Zener Clamp Voltage	VZ	ICC = 5 mA; TA = 25C	28			V
Zener Impedance	IZ	ICC = 5 mA; TA = 25C		50
Operate Point	BOP	A1120		35	50	G
Operate Point	BOP	A1121		95	135	G
Operate Point	BOP	A1122		150	200	G
Operate Point	BOP	A1123		280	355	G
Operate Point	BOP	A1125		35	50	G
Release Point	BRP	A1120		25		G
Release Point	BRP	A1121		70	110	G
Release Point	BRP	A1122		125	190	G
Release Point	BRP	A1123		225	300	G
Release Point	BRP	A1125		25		G
Hysteresis	BHYS	A1120		10		G
Hysteresis	BHYS	A1121		25	42	G
Hysteresis	BHYS	A1122		25	42	G
Hysteresis	BHYS	A1123		55	80	G
Hysteresis	BHYS	A1125		10		G

2410010303_ALLEGRO-A1120LUA-T_C146408.pdf

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