A1421LK-T(2005) Просмотр технического описания (PDF) - Allegro MicroSystems
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Компоненты Описание
производитель
A1421LK-T
(Rev.:2005)
(Rev.:2005)
Allegro MicroSystems
A1421LK-T Datasheet PDF : 16 Pages
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A1421, A1422, A1423
High Precision Hall Effect AC-Coupled Differential Sensor with Integrated Filter Capacitor
The devices in this family differ from each other in their
switchpoint speci? cations and their switching polarity. The
A1421 has a small hysteresis and asymmetrical switchpoints,
with one switchpoint at the zero-crossing. The A1422 has a small
hysteresis and symmetrical switchpoints, both near the zero-
crossing. The A1423 offers high vibration immunity, by means
of its larger hysteresis that establishes symmetrical switchpoints
further from the zero-crossing. The output polarities are shown
in the Product Selection Guide table.
This variety of options provides ? exibility for achieving solu-
tions for a wide range of applications, including automotive
transmission and crankshaft speed sensing.
The device package has an operating ambient temperature range
–40 °C to 150°C , and is provided in a 4-pin plastic SIP. Each
package is available in a lead (Pb) free version (suffix, –T) , with
a 100% matte tin plated leadframe.
Product Selection Guide
Part Number
Pb-free1
Output Switching
at BDIFF = 0
BDiff
Increasing
BDiff
Decreasing
A1421LK-T
A1422LK-T
A1423LK
A1423LK-T
Yes
Low (On) to
High (Off)
High (Off) to
Low (On)
Yes
High (Off) to
Low (On)
Low (On) to
High (Off)
–
High (Off) to Low (On) to
Yes
Low (On)
High (Off)
Switchpoints
Symmetry
BOP(typ)
(G)
BRP(typ)
(G)
BOP(max)+
BRP(min)
(G)
BOP(typ)+
BRP(typ)
(G)
BOP(min)+
BRP(max)
(G)
15
0
15
15
7.5
15
–15
0
0
0
65
–65
0
0
0
Packing2
Bulk, 500
pieces/bag
1Pb-based variants are being phased out of the product line. Certain variants cited in this footnote are in production but have been
determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted to existing
customer applications. The variants should not be purchased for new design applications because obsolescence in the near future
is probable. Samples are no longer available. Status change: May 1, 2006. These variants include: A1421LK and A1422LK.
2Contact Allegro for additional packing options.
A1421-DS
Allegro MicroSystems, Inc.
2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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