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PDF A1250 Data sheet ( Hoja de datos )
| Número de pieza | A1250 | |
| Descripción | Hall-Effect Latch / Bipolar Switch | |
| Fabricantes | Allegro | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de A1250 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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A1250
Hall-Effect Latch / Bipolar Switch
FEATURES AND BENEFITS
• AEC-Q100 automotive qualified
• High-speed, 4-phase chopper stabilization
• Low operating voltage down to 3 V
• High sensitivity
• Stable switchpoints
• Robust EMC
Packages:
3-Pin SOT23W
(suffix LH)
3-Pin SIP
(suffix UA)
Not to scale
V+
VCC
Regulator
DESCRIPTION
The A1250 Hall-effect sensor IC is a temperature-stable,
stress-resistant bipolar switch. This device is the most sensitive
Hall-effect device in theAllegro™ bipolar switch family and is
intended for ring-magnet sensing. Superior high-temperature
performance is made possible through an Allegro patented
dynamic offset cancellation that utilizes chopper stabilization.
This method reduces the offset voltage normally caused by
device overmolding, temperature dependencies, and thermal
stress.
The A1250 includes the following on a single silicon chip:
a 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 takes advantage of low-voltage
requirements, component matching, very low input-offset
errors, and small component geometries.
The A1250 Hall-effect bipolar switch turns on in a south
polarity magnetic field of sufficient strength and switches
off in a north polarity magnetic field of sufficient strength.
Because the output state is not defined if the magnetic field
is diminished or removed, to ensure that the device switches,
Allegro recommends using magnets of both polarities and of
sufficient strength in the application.
The A1250 is rated for operation in the ambient temperature
Continued on the next page…
To All Subcircuits
A1250-DS, Rev. 4
Clock / Logic
Amp
Low-Pass
Filter
Control
Current
Limit
Functional Block Diagram
VOUT
1Ω
GND
1 page  
A1250
Hall-Effect Latch / Bipolar Switch
CHARACTERISTIC PERFORMANCE DATA
Supply Current (On) versus Supply Voltage
Supply Current (On) versus Ambient Temperature
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
-40°C
25°C
150°C
5 10 15 20 25
VCC (V)
Supply Current (Off) versus Supply Voltage
4.0
3.5
3.0
2.5
2.0
1.5 Vcc: 24 V
Vcc: 3 V
1.0
0.5
0
-50 -25 0 25 50 75 100 125 150
TA (°C)
Supply Current (Off) versus Ambient Temperature
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
-40°C
25°C
150°C
5 10 15 20 25
VCC (V)
4.0
Vcc: 24 V
3.5 Vcc: 3 V
3.0
2.5
2.0
1.5
1.0
0.5
0
-50 -25 0 25 50 75 100 125 150
TA (°C)
500
450
400
350
300
250
200
150
100
50
0
-50
VOUT(SAT) versus Ambient Temperature
IOUT = 20 mA
Vcc: 3 V
Vcc: 24 V
-25 0 25 50 75 100 125 150
TA (°C)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
5 Page 
A1250
Hall-Effect Latch / Bipolar Switch
For Reference Only – Not for Tooling Use
(Reference DWG-9013)
Dimensions in millimeters – NOT TO SCALE
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
45°
3.02
+0.08
–0.05
1.44 E
4.09
+0.08
–0.05
E
2.04
B
1.52 ±0.05
C
2 X 10°
E
Branded
Face
Mold Ejector
Pin Indent
45°
1.02 MAX
12 3
A
0.79 REF
0.43
+0.05
–0.07
0.41
+0.03
–0.06
14.99 ±0.25
1.27 NOM
NNN
1
D Standard Branding Reference View
= Supplier emblem
N = Last three digits of device part number
Figure 5: Package UA, 3-Pin SIP
A Dambar removal protrusion (6X)
B Gate and tie bar burr area
C Active Area Depth, 0.50 mm REF
D Branding scale and appearance at supplier discretion
E Hall element, not to scale
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet A1250.PDF ] | |
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