Sensitive Two-Wire Chopper-Stabilized
Unipolar Hall Effect Switches
A1140, A1141,
A1142, and A1143
Description (continued)
features on-chip transient protection and a Zener clamp to protect
against overvoltage conditions on the supply line.
and switch HIGH otherwise. The other differences in the switches
are their defined low current levels and magnetic switchpoints.
The output currents of the A1141 and A1143 switch HIGH in the
presenceofasouth(+)polaritymagneticfieldofsufficientstrength,
and switch LOW otherwise, as in the presence of a weak field or a
north (–) polarity field. The other two devices in the family (A1140
and A1142) have an opposite output: the currents switch LOW in
thepresenceofasouth-polaritymagneticfieldofsufficientstrength,
All versions are offered in two package styles. The LH is a SOT-
23W,miniaturelow-profilepackageforsurface-mountapplications.
The UA is a three-lead ultramini SIP for through-hole mounting.
Each package is available in a lead (Pb) free version (suffix, –T)
with100%mattetinplatedleadframe.Field-programmableversions
also available: A1180, A1181, A1182, and A1183.
Absolute Maximum Ratings
Characteristic
Symbol
VCC
Notes
Rating
28
Units
V
Supply Voltage
Reverse Supply Voltage
Magnetic Flux Density
VRCC
B
–18
V
Unlimited
–40 to 85
–40 to 150
165
G
Range E
Range L
ºC
ºC
ºC
ºC
Operating Ambient Temperature
TA
Maximum Junction Temperature
Storage Temperature
TJ(max)
Tstg
–65 to 170
Package LH, 3-pin SOT
Package UA, 3-pin SIP
3
NC
1. VCC
1. VCC
2. GND
3. GND
1
2
2. No connection
3. GND
1
2
3
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
2
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
