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A3245LUA-T Datasheet

  • A3245LUA-T

  • Chopper-Stabilized Omnipolar Hall-Effect Switches

  • 392.62KB

  • 12頁

  • ALLEGRO   ALLEGRO

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A3245
Chopper-Stabilized
Omnipolar Hall-Effect Switches
Package LH, 3-pin Surface Mount
GND
3
1
2
1
2
The A3245 integrated circuit is an omnipolar, ultrasensitive Hall-effect switch
with a digital output. This sensor has an integrated regulator permitting operation
to 24 V, making it the
鏗?/div>
rst omnipolar switch available for operation to 24 V. This
device is especially suited for operation over extended temperature ranges, up
to +150擄C. Superior high-temperature performance is made possible through an
Allegro
廬
patented dynamic offset cancellation, which reduces the residual offset
voltage normally caused by device overmolding, temperature excursions, and
thermal stress.
The A3245 Hall-effect switch includes the following on a single silicon chip:
voltage regulator, Hall-voltage generator, small-signal ampli鏗乪r, chopper stabiliza-
tion, 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 com-
ponent geometries.
The omnipolar operation of the A3245 allows activation with either a north
or
a south polarity
鏗?/div>
eld of suf鏗乧ient strength. In the absence of a magnetic
鏗?/div>
eld,
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 A3245 does not require manufacturers to orient their
magnets. These devices allow simple on/off switching in industrial, consumer, and
automotive applications.
The A3245 is rated for operation between the ambient temperatures 鈥?0擄C and
85擄C for the E temperature range, and 鈥?0擄C to 150擄C for the L temperature
range. The small geometries of the BiCMOS process allow these devices to be
provided in ultrasmall packages. The package styles available provide magneti-
cally optimized solutions for most applications. Package LH is an SOT23W, a
miniature low-pro鏗乴e surface-mount package, while package UA is a three-lead
ultramini SIP for through-hole mounting. Each package is available in a lead (Pb)
free version, with 100% matte tin plated leadframes.
3
Package UA, 3-pin SIP
1
2
VOUT
GND
VCC
VOUT
3
VCC
1 2
3
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
CC
..........................................
28 V
Reverse-Supply Voltage, V
RCC
........................
鈥?8 V
Reverse-Supply Current, I
RCC
........................鈥?
mA
Output Off Voltage, V
OUT
..................................
28 V
Output Current, I
OUTSINK
...........
Internally Limited
Magnetic Flux Density, B .........................Unlimited
Operating Temperature
Ambient, T
A
, Range E..................
鈥?0潞C to 85潞C
Ambient, T
A
, Range L................
鈥?0潞C to 150潞C
Maximum Junction, T
J(MAX)
......................165潞C
Storage Temperature, T
S
..................
鈥?5潞C to 170潞C
Features and Bene鏗乼s
Omnipolar operation
Chopper stabilization
Superior temperature stability
Extremely low switchpoint drift
Insensitive to physical stress
Reverse battery protection
Output short circuit protection
Solid state reliability
Small size
Robust EMC capability
High ESD ratings (HBM)
A3245-DS, Rev. 1
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com

A3245LUA-T 產品屬性

  • 500

  • 傳感器，轉換器

  • 磁性 - 霍爾效應，數字式開關，線性，羅盤 (IC)

  • -

  • ±55G 跳閘，±6G 釋放

  • 全極開關

  • 3.6 V ~ 24 V

  • 3.5mA

  • -

  • 數字式，開漏極

  • 穩(wěn)壓電壓

  • -40°C ~ 150°C

  • 3-SIP

  • 3-SIP

  • 散裝

  • 620-1213

A3245LUA-T相關型號PDF文件下載

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  • 英文版
    CHOPPER-STABILIZED, PRECISION HALL-EFFECT SWITCH
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  • 英文版
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