Chopper-Stabilized, Precision Hall-Effect Switch
A3240
4
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Supply Voltage Range V
CC
Operating, T
J
< 170°C
1
4.2 – 24 V
Output Leakage Current I
OFF
V
OUT
= 24 V, B < B
RP
– – 10 μA
Output Saturation Voltage V
OUT(SAT)
I
OUT
= 20 mA, B > B
OP
– 185 500 mV
Output Current Limit I
OM
B > B
OP
30 – 60 mA
Power-On Time t
po
V
CC
> 4.2 V – – 50 μs
Chopping Frequency f
C
– 340 – kHz
Output Rise Time t
r
R
L
= 820 , C
L
= 20 pF – 0.2 2.0 μs
Output Fall Time t
f
R
L
= 820 , C
L
= 20 pF – 0.1 2.0 μs
Supply Current I
CC
B < B
RP
, V
CC
= 12 V – 3.0 6.0 mA
B > B
OP
, V
CC
= 12 V – 4.0 6.0 mA
Reverse Battery Current I
CC
V
RCC
= -30 V – – -5.0 mA
Zener Voltage V
Z
+ V
D
I
CC
= 15 mA, T
A
= 25°C 28 32 37 V
Zener Impedance z
z
+ z
D
I
CC
= 15 mA, T
A
= 25°C – 50 –
NOTES: 1. Maximum voltage must be adjusted for power dissipation and junction temperature.
2. B
OP
= operate point (output turns on); B
RP
= release point (output turns off).
3. Typical Data is at T
A
= +25°C and V
CC
= 12 V and is for design information only.
ELECTRICAL CHARACTERISTICS over operating temperature range.
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Operate Point B
OP
– 35 50 G
Release Point B
RP
5.0 25 – G
Hysteresis B
hys
B
OP
- B
RP
– 10 – G
NOTES: 1. Typical Data is at T
A
= +25°C and V
CC
= 12 V and is for design information only.
2. 1 gauss (G) is exactly equal to 0.1 millitesla (mT).
MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.
