Micropower Ultra-Sensitive Hall-Effect Switch
A1172
3
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
OPERATING CHARACTERISTICS
Characteristic Symbol Test Conditions Min. Typ.
1
Max. Units
Electrical Characteristics valid over full operating voltage range and T
A
= 25°C
Supply Voltage Range
2
V
DD
Operating, T
A
= 25°C 1.65 – 3.5 V
Output On Voltage
V
OUT(SAT)
NMOS on, I
OUT
= 1 mA, V
DD
= 2.75 V – 100 300 mV
V
OUT(HIGH)
PMOS on, I
OUT
= 1 mA, V
DD
= 2.75 V V
DD
–300 V
DD
–100 – mV
Period t
PERIOD
– 50 100 ms
Chopping Frequency f
C
– 200 – kHz
Supply Slew Rate
3
SR 20 – – V/ms
Supply Current
I
DD(EN)
Chip awake (enabled) – – 2.0 mA
I
DD(DIS)
Chip asleep (disabled) – – 8.0 μA
I
DD(AV)
V
DD
= 1.80 V – 4 8 μA
V
DD
= 3.5 V – 6 12 μA
Magnetic Characteristics
4
at T
A
= 25°C and 1.8 V ≤ V
DD
≤ 3.5 V
Operate Point
B
OPS
–3255G
B
OPN
–55 –32 – G
Release Point
B
RPS
626– G
B
RPN
– –26 –6 G
Hysteresis B
HYS
B
HYS
=
B
OPX
–
B
RPX
–6–G
1
Typical values at V
DD
= 2.75 V. Performance may vary for individual units, within the specified maximum and minimum limits.
2
Magnetic operate and release points vary with supply voltage.
3
If SR < SR(min), then valid device output might be delayed for one Period, t
PERIOD
, of device.
4
1 gauss (G) is exactly equal to 0.1 millitesla (mT).
