Micropower, Ultrasensitive
Hall-Effect Switches
A3211 and
A3212
5
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
A3211 MAGNETIC CHARACTERISTICS: Over operating voltage range (unless otherwise specied)
Characteristic Symbol Test Conditions
Limits
Min. Typ. Max. Units
Over Temperature Range E: T
A
= –40°C to 85°C
Operate Points
B
OPS
South pole to branded side; B > B
OP
, V
OUT
= High (Output Off) – 37 55 G
B
OPN
North pole to branded side; B > B
OP
, V
OUT
= High (Output Off) –55 –40 – G
Release Points
B
RPS
South pole to branded side; B < B
RP
, V
OUT
= Low (Output On) 10 31 – G
B
RPN
North pole to branded side; B < B
RP
, V
OUT
= Low (Output On) – –34 –10 G
Hysteresis B
HYS
|B
OPx
- B
RPx
| – 5.9 – G
NOTES: 1. Negative flux densities are defined as less than zero (algebraic convention), i.e., -50 G is less than +10 G.
2. B
OPx
= operate point (output turns off); B
RPx
= release point (output turns on).
3. Typical Data is at T
A
= +25°C and V
DD
= 2.75 V and is for design information only.
4. 1 gauss (G) is exactly equal to 0.1 millitesla (mT).
Characteristic Symbol Test Conditions
Limits
Min. Typ. Max. Units
Over Temperature Range E: T
A
= –40°C to 85°C
Operate Points
B
OPS
South pole to branded side; B > B
OP
, V
OUT
= Low (Output On) – 37 55 G
B
OPN
North pole to branded side; B > B
OP
, V
OUT
= Low (Output On) –55 –40 – G
Release Points
B
RPS
South pole to branded side; B < B
RP
, V
OUT
= High (Output Off) 10 31 – G
B
RPN
North pole to branded side; B < B
RP
, V
OUT
= High (Output Off) – –34 –10 G
Hysteresis B
HYS
|B
OPx
- B
RPx
| – 5.9 – G
Over Temperature Range L: T
A
= –40°C to 150°C
Operate Points
B
OPS
South pole to branded side; B > B
OP
, V
OUT
= Low (Output On) – 37 65 G
B
OPN
North pole to branded side; B > B
OP
, V
OUT
= Low (Output On) –65 –40 – G
Release Points
B
RPS
South pole to branded side; B < B
RP
, V
OUT
= High (Output Off) 10 31 – G
B
RPN
North pole to branded side; B < B
RP
, V
OUT
= High (Output Off) – –34 –10 G
Hysteresis B
HYS
|B
OPx
- B
RPx
| – 5.9 – G
NOTES: 1. Negative flux densities are defined as less than zero (algebraic convention), i.e., -50 G is less than +10 G.
2. B
OPx
= operate point (output turns on); B
RPx
= release point (output turns off).
3. Typical Data is at T
A
= +25°C and V
DD
= 2.75 V and is for design information only.
4. 1 gauss (G) is exactly equal to 0.1 millitesla (mT).
A3212 MAGNETIC CHARACTERISTICS: Over operating voltage range (unless otherwise specied)
