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A1425 Datasheet(PDF) 4 Page - Allegro MicroSystems

Part No. A1425
Description  High Accuracy Analog Speed Sensor with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
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A1425 Datasheet(HTML) 4 Page - Allegro MicroSystems

 
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A1425-DS
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
www.allegromicro.com
Allegro MicroSystems, Inc.
High Accuracy Analog Speed Sensor with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal
A1425
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
Characteristic
Symbol
Test Conditions
Rating Units
Package Thermal Resistance
RθJA
Single-layer PCB, with copper limited to solder pads
177
ºC/W
20
40
60
80
100
120
140
160
180
Temperature (ºC)
Power Derating Curve
8
10
12
14
0
2
4
6
16
18
20
22
24
26
28
30
(RθJA = 177 ºC/W)
VCC(min)
VCC(max)
Temperature (°C)
20
40
60
80
100
120
140
160
180
Maximum Power Dissipation, PD(max)
(R
θJA
=
177
ºC/W)
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
The following provide additional information about some of
the parameters cited in the Operating Characteristics table.
For additional information, visit the Allegro Web site at
www.allegromicro.com.
Applied Magnetic Field, Bdiff – The differential magnetic flux
density which is calculated as the arithmetic difference of the
flux densities observed by each of the two Hall elements.
Output Off Switchpoint (Operate Point), BOP – The value of
increasing differential magnetic flux density at which the device
output switches from low to high. This value may be greater than
or less than 0 G.
Output On Switchpoint (Release Point), BRP – The value of
decreasing differential magnetic flux density at which the device
output switches from high to low. This value may be greater
than or less than 0 G.
Power-On Time, tPO – The time needed by the device, after
power is applied, to initialize all circuitry necessary for proper
operation.
Settling Time, tSettle – The time required by the device, after tPO,
and after a valid magnetic signal has been applied, to provide
proper output transitions. Settling time is a function of magnetic
offset, offset polarity, signal phase, signal frequency, and signal
amplitude.
Response Time tResponse – The total time required for generat-
ing zero-crossing output transitions after power-up (the sum of
power-on time and settling time).
Definitions of Terms


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