Micropower, Ultrasensitive
Hall-Effect Switches
A3211 and
A3212
2
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
requirements, component matching, very low input-offset errors,
and small component geometries.
Four package styles provide magnetically optimized solutions for
most applications. Miniature low-profile surface-mount package
types EH and EL (0.75 and 0.50 mm nominal height) are leadless, LH
is a 3-pin low-profile SMD, and UA is a three-pin SIP for through-
hole mounting. Packages are lead (Pb) free (suffix, –T) with 100%
matte-tin-plated leadframes.
DESCRIPTION (continued)
ABSOLUTE MAXIMUM RATINGS
Characteristic Symbol Notes Rating Units
Supply Voltage V
DD
5 V
Magnetic Flux Density B Unlimited G
Output Off Voltage V
OUT
5 V
Output Current I
OUT
1 mA
Operating Ambient Temperature T
A
Range E –40 to 85 °C
Range L –40 to 150 °C
Maximum Junction Temperature T
J
(max) 165 °C
Storage Temperature T
stg
–65 to 170 °C
SELECTION GUIDE
Part Number Packing
[1]
Package
Ambient Temperature
T
A
(°C)
State in
Magnetic Field
A3211EEHLT–T
[2][3][4]
3000 pieces per reel 2 mm × 3 mm, 0.75 mm nominal height DFN
–40 to 85 Off
A3211EELLT–T
[2][4][5]
3000 pieces per reel 2 mm × 2 mm, 0.50 mm nominal height DFN
A3211ELHLT–T
[4]
3000 pieces per reel 3-pin surface mount SOT23W
A3211ELHLX–T
[4]
10000 pieces per 13-in. reel 3-pin surface mount SOT23W
A3212EEHLT–T
[2][3]
3000 pieces per reel 2 mm × 3 mm, 0.75 mm nominal height DFN
–40 to 85
On
A3212EELLT–T
[2][5]
3000 pieces per reel 2 mm × 2 mm, 0.50 mm nominal height DFN
A3212ELHLT–T 3000 pieces per reel 3-pin surface mount SOT23W
A3212ELHLX–T 10000 pieces per 13-in. reel 3-pin surface mount SOT23W
A3212EUA–T 500 pieces per bulk bag SIP-3 through hole
A3212LLHLT–T 3000 pieces per reel 3-pin surface mount SOT23W
–40 to 150A3212LLHLX–T 10000 pieces per 13-in. reel 3-pin surface mount SOT23W
A3212LUA–T 500 pieces per bulk bag SIP-3 through hole
1
Contact Allegro for additional packaging and handling options.
2
Allegro products sold in DFN package types are not intended for automotive applications.
3
Variant is no longer in production. The device should not be purchased for new design applications. Samples are no longer available.
Date of status change: June 1, 2015 (A3212EEHLT-T), December 1, 2015 (A3211EEHLT-T).
4
For automotive sales, please contact the eld applications engineer.
5
Variant is in production but has been determined to be LAST TIME BUY. This classication indicates that the product is obsolete and notice has been given. Sale of this
device is currently restricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near
future. Samples are no longer available. Date of status change: September 1, 2016.
SPECIFICATIONS
