Allegro Multimedia A1321 Characteristics Symbol Test Condition Min Typ3 Max Units4, UA Package

A1321, A1322, and A1323

Ratiometric Linear Hall Effect Sensor for High-Temperature Operation

MAGNETIC CHARACTERISTICS1,2 over operating temperature range, TA; VCC = 5 V, Iout = –1 mA; unless otherwise noted

Characteristics		Symbol			Test Condition	Min	Typ3	Max	Units4
Sensitivity5		Sens			A1321; TA = 25ºC	4.750	5.000	5.250	mV/G
					A1322; T = 25ºC	2.969	3.125	3.281	mV/G
					A
					A1323; TA = 25ºC	2.375	2.500	2.625	mV/G
Delta Vout(q) as a func-		Vout(q)(ΔT)			Defined in terms of magnetic flux density, B	–	–	±10	G
tion of temperature
Ratiometry, Vout(q)		Vout(q)(ΔV)				–	–	±1.5	%
Ratiometry, Sens		ΔSens(ΔV)				–	–	±1.5	%
Positive Linearity		Lin+				–	–	±1.5	%
Negative Linearity		Lin–				–	–	±1.5	%
Symmetry		Sym				–	–	±1.5	%
UA Package
Delta Sens at T	= max5	ΔSens	(TAmax)		From hot to room temperature	–2.5	–	7.5	%
A
Delta Sens at T	= min5	ΔSens	(TAmin)		From cold to room temperature	–6	–	4	%
A
Sensitivity Drift6		Sens		Drift	T = 25°C; after temperature cycling and over time	–	±2	–	%
					A
LH Package
Delta Sens at T	= max5	ΔSens	(TAmax)		From hot to room temperature	–5	–	5	%
A
Delta Sens at T	= min5	ΔSens	(TAmin)		From cold to room temperature	–3.5	–	8.5	%
A
Sensitivity Drift6		Sens		Drift	T = 25°C; after temperature cycling and over time	–	±2	–	%
					A

1Additional information on chracteristics is provided in the section Characteristics Definitions, on the next page.

2Negative current is defined as conventional current coming out of (sourced from) the specified device terminal.

3Typical data is at TA = 25°C, except for ΔSens, and at x.x Sens. Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for individual units, within the specified maximum and minimum limits. In addition, the typical values vary with gain.

410 G = 1 millitesla.

5After 150ºC pre-bake and factory programming.

6Sensitivity drift is the amount of recovery with time.

Allegro MicroSystems, Inc. 4

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com