A1421LK-T(2005) Просмотр технического описания (PDF) - Allegro MicroSystems
Номер в каталоге
Компоненты Описание
производитель
A1421LK-T
(Rev.:2005)
(Rev.:2005)
Allegro MicroSystems
A1421LK-T Datasheet PDF : 16 Pages
| |||
A1421, A1422, A1423
High Precision Hall Effect AC-Coupled Differential Sensor with Integrated Filter Capacitor
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
Characteristic
Symbol
Test Conditions*
Package Thermal Resistance
RθJA Minimum-K PCB (single-sided with copper limited to solder pads)
*In still air. Additional thermal information available on Allegro Web site.
Value Units
177 ºC/W
Power Derating Curve
TJ(max) = 165ºC; ICC = ICC(max)
30
28
26
VCC(max)
24
22
20
18
16
14
12
Minimum-K PCB
10
(RθJA = 177 ºC/W)
8
6
4
VCC(min)
2
0
20 40 60 80 100 120 140 160 180
Definitions of Terms
900
850
800
750
700
650
600
550
500
450
400
350
300
250
200
150
100
50
0
20
Maximum Power Dissipation, PD(max)
TJ(max) = 165ºC; VCC = VCC(max); ICC = ICC(max)
(RθMJAin=im1u7m7-ºKCP/WC)B
40 60 80 100 120 140 160 180
Temperature (°C)
The following provide additional information about some of the
parameters cited. 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. fBdiff is
the input signal frequency.
Output Off Switchpoint (Operate Point), BOP – The value of
increasing differential magnetic flux density at which the device
output switches from low to high (A1421) or high to low (A1422
and A1423).
Output On Switchpoint (Release Point), BRP – The value of
decreasing differential magnetic flux density at which the device
output switches from high to low (A1421) or from low to high
(A1422 and A1423).
Power-On Time, tPO – The time needed by the device, after
power is applied, to initialize all circuitry necessary for proper
operation.
Settling Time, tSettling – 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.
Supply Current (on), ICC(on) – The current draw of the device
with the output transitor is turned on.
Supply Current (off), ICC(off) – The current draw of the device
with the output transitor is turned off.
Response Time, tResponse – The total time required for generating
zero-crossing output transitions after initialization (the sum of
Power-on Time and Settling Time).
A1421-DS
Allegro MicroSystems, Inc.
6
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Share Link: