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參數資料
| 型號： | A3230LUA |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | Chopper-Stabilized Hall-Effect Bipolar Switch |
| 中文描述： | 斬波穩(wěn)定霍爾效應雙極開關 |
| 文件頁數： | 1/12頁 |
| 文件大?。?/td> | 478K |
| 代理商： | A3230LUA |
A3230
A3230-DS
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
AB SO LUTE MAX MUM RAT NGS
Supply Voltage, V
CC
..........................................
28 V
Reverse-Supply Voltage, V
RCC
........................
–18 V
Output Off Voltage, V
OUT
...............................
26.5 V
Output Current, I
OUTSINK
...........
Internally Limited
Reverse-Output Current, I
ROUT
....................–
10 mA
Magnetic Flux Density, B.........................
Unlimited
Operating Temperature
Ambient, T
A
, Range E..................
–40oC to 85oC
Ambient, T
A
, Range L................
–40oC to 150oC
Maximum Junction, T
J(MAX)
......................
165oC
Storage Temperature, T
S
..................
–65oC to 170oC
Chopper-Stabilized
Hall-Effect Bipolar Switch
Package LH, 3-pin Surface Mount
Features and Bene
fi
ts
Package UA, 3-pin SIP
Chopper stabilization
y
Superior temperature stability
y
Extremely low switchpoint drift
y
Insensitive to physical stress
Reverse battery protection
Output short circuit protection
Solid state reliability
Small size
Robust EMC capability
High ESD ratings (HBM)
The A3230 Hall-effect sensor is a temperature stable, stress-resistant bipolar
switch. This sensor is the most sensitive Hall-effect device in the Allegro
bipolar
switch family and is intended for ring-magnet sensing. Superior high-temperature
performance is made possible through an Allegro patented dynamic offset cancel-
lation that utilizes chopper-stabilization. This method reduces the offset voltage
normally caused by device overmolding, temperature dependencies, and thermal
stress.
The A3230 includes the following on a single silicon chip: a voltage regulator,
Hall-voltage generator, small-signal ampli
fi
er, 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 A3230 Hall-effect bipolar switch turns on in a south polarity magnetic
fi
eld of
suf
fi
cient strength and switches off in a north polarity magnetic
fi
eld of suf
fi
cient
strength. Because the output state is not de
fi
ned if the magnetic
fi
eld is diminished
or removed, to ensure that the device switches, Allegro recommends using mag-
nets of both polarities and of suf
fi
cient strength in the application.
The A3230 is rated for operation between the ambient temperatures –40°C and
85°C for the E temperature range, and –40°C to 150°C for the L temperature
range.
Two A3230 package styles provide magnetically optimized solutions
for most applications. Package LH is a SOT23W, a miniature low-pro
fi
le
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.
1
3
2
V
G
V
1
2
3
V
V
G
1
2
3
1
2
3
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