A1126 Datasheet PDF - Allegro
| Part Number | A1126 | |
| Description | Chopper-Stabilized Omnipolar Hall-Effect Switch | |
| Manufacturers | Allegro | |
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There is a preview and A1126 download ( pdf file ) link at the bottom of this page. Total 14 Pages | ||
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A1126
Chopper-Stabilized Omnipolar Hall-Effect Switch
Features and Benefits
• AEC-Q100 automotive qualified
• Omnipolar operation
• Low switchpoint drift
• Superior temperature stability
• Insensitive to physical stress
• Reverse-battery protection
• Robust EMC capability
• Robust ESD protection
Packages:
3-pin SOT23-W
2 mm × 3 mm × 1 mm
(suffix LH)
3-pin ultramini SIP
1.5 mm × 4 mm × 3 mm
(suffix UA)
Not to scale
Approximate footprint
Description
The A1126 integrated circuit is an omnipolar, ultrasensitive
Hall-effect switch with a digital output. This device has an
integrated regulator permitting operation to 24 V.
This device is especially suited for operation through extended
temperature ranges, up to 150°C. Superior high-temperature
performance is made possible through an Allegro™ patented
dynamic offset cancellation, which reduces the residual offset
voltage normally caused by device overmolding, temperature
excursions, and thermal stress.
The A1126 Hall-effect switch includes the following on a
single silicon chip: voltage regulator, Hall-voltage generator,
small-signal amplifier, chopper stabilization, Schmitt trigger,
and a short-circuit-protected open-drain output. Advanced
BiCMOS wafer fabrication processing is used to take advantage
of low-voltage requirements, component matching, very low
input-offset errors, and small component geometries.
The omnipolar operation of the A1126 allows activation with
either a north or a south polarity field of sufficient strength. In
the absence of a magnetic field, the output is off. This patented
magnetic-polarity-independence feature makes this device
an excellent replacement for reed switches, with improved
ease of manufacturing, because the A1126 does not require
Continued on the next page…
Functional Block Diagram
VCC
Regulator
To all subcircuits
Amplifier
Signal
Recovery
Omnipolar
Switchpoints
Control
Current
Limit
VOUT
GND
A1126-DS, Rev. 2
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A1126
Chopper-Stabilized Omnipolar Hall-Effect Switch
Average Operate Point (South) versus Temperature
55
50
45
40
35 VCC = 3.0 V
30
VCC = 24 V
25
20
15
-60 -40 -20 0 20 40 60 80 100 120 140 160
Ambient Temperature, TA (°C)
Average Operate Point (South) versus Supply Voltage
55
50
45
40
35
TA = –40°C
TA = 150°C
30
TA = 25°C
25
20
15
0
5 10 15 20
Supply Voltage, VCC (V)
25
Average Release Point (South) versus Temperature
50
45
40
35
30
25
20
15
10
5
-60
VCC = 3.0 V
VCC = 24 V
-40 -20 0 20 40 60 80 100
Ambient Temperature, TA (°C)
120 140 160
Average Release Point (South) versus Supply Voltage
50
45
40
35
30
25 TA = 150°C
TA = –40°C
20
15
10 TA = 25°C
5
0 5 10 15 20 25
Supply Voltage, VCC (V)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for A1126 electronic component. |
| Information | Total 14 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ A1126.PDF Datasheet ] | |
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