A3260EUA Allegro Microsystems Inc, A3260EUA Datasheet - Page 6

• Manufacturer Part Number: A3260EUA
• Description: IC SW HALL EFFECT BIPO 3-SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Bipolar Latchr

Specifications of A3260EUA

• Sensing Range: 40G Trip, -40G Release
• Voltage - Supply: 3.5 V ~ 24 V
• Current - Output (max): 8mA
• Output Type: Digital, Open Collector
• Features: Regulated Voltage
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 3-SIP
• Magnetic Type: Bipolar
• Operating Supply Voltage (min): 3.5V
• Operating Supply Voltage (typ): 5/9/12/15/18V
• Operating Supply Voltage (max): 24V
• Mag Sensor Operate Point (g): 40Gs
• Mag Sensor Release Point (g): -40Gs
• Mag Sensor Hysteresis(g): 20Gs
• Package Type: Ultra Mini SIP
• Pin Count: 3
• Mounting: Through Hole
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Supply: -
• Lead Free Status / RoHS Status: Not Compliant, Contains lead / RoHS non-compliant

Chopper-Stabilized Technique. These devices use a
proprietary dynamic offset cancellation technique, with an
internal high-frequency clock to reduce the residual offset
voltage of the Hall element that is normally caused by device
overmolding, temperature dependencies, and thermal stress.
This technique produces devices that have an extremely stable
quiescent Hall output voltage, are immune to thermal stress, and
have precise recoverability after temperature cycling. This
technique will also slightly degrade the device output repeat-
Hall-voltage signal that is induced by the external magnetic
flux. The signal is, then, captured by a sample-and-hold circuit.
Operation. The output of these devices turns ON when a
magnetic field (north pole) perpendicular to the Hall element
exceeds the release point threshold (B
output will source current equal to the device operating current
plus a current source (I
increased (south pole) above the operate point (B
will source current equal to the device operating
current with the current source turned OFF (I
especially that release can occur when the magnetic field is
removed but to ensure release, a field reversal is required. The
difference in the magnetic operate and release points is the
hysteresis (B
switching of the output even in the presence of external me-
chanical vibration or electrical noise.
B
state. The correct state is warranted after the first excursion
beyond B
require field reversal for reliable operation over temperature
range; latches will not switch on removal of magnetic field.
ability.
similar to a Wheatstone bridge. A large portion of the offset is
a result of the mismatching of these resistors. The chopper-
stabilizing technique cancels the mismatching of the resistors by
changing the direction of the current flowing through the Hall
plate and Hall voltage measurement taps, while maintaining the
OP
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The Hall element can be considered as a resistor array
Powering up in the absence of a magnetic field (less than
and higher than B
Bipolar switches may switch on removal of field but
OP
or B
hys
) of the device. The hysteresis allows clean
RP
.
RP
GND(H)
) will allow an indeterminate output
). When the magnetic field is
RP
). After turn-ON, the
GND(L)
FUNCTIONAL DESCRIPTION
OP
). Note
), the output
2-WIRE, CHOPPER-STABILIZED,
+I
0
-B
PRECISION HALL-EFFECT
I
CC
REG
X
+V
B
RP
FLUX DENSITY
BIPOLAR SWITCH
B
0
I
OUT
B
+ I
OP
CC
Dwg. AH-011-2
HALL
VOLTAGE
—
+
Dwg. GH-034-6
3260
Dwg. EH-012
+B
5