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參數(shù)資料
| 型號(hào)： | A1141 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches |
| 中文描述： | 敏感的兩線斬波穩(wěn)定單極霍爾效應(yīng)開關(guān) |
| 文件頁數(shù)： | 1/13頁 |
| 文件大?。?/td> | 354K |
| 代理商： | A1141 |
Description
The A1140, A1141, A1142, and A1143 devices are sensitive,
two-wire, unipolar, Hall effect switches that are factory-
programmed at end-of-line to optimize magnetic switchpoint
accuracy. These devices use a patented high frequency chopper-
stabilization technique, produced using the Allegro advanced
BiCMOS wafer fabrication process, to achieve magnetic
stability and to eliminate offset inherent in single-element
devices exposed to harsh application environments.
Commonly found in a number of automotive applications,
these switches are utilized to sense seat track position,
seat belt buckle presence, hood/trunk latching, and shift
selector position. Two-wire unipolar switches, such as the
A1140/41/42/43 family, are particularly advantageous in
price-sensitive applications because they require one less
wire for operation than do switches with the more traditional
open-collector output. Additionally, the system designer
inherently gains diagnostics because there is always output
current flowing, which should be in either of two narrow
ranges. Any current level not within these ranges indicates a
fault condition. The A1140/41/42/43 family of switches also
A1140-DS, Rev. 8
Features and Benefits
Chopper stabilization
Low switchpoint drift over operating
temperature range
Low sensitivity to stress
Factory programmed at end-of-line for optimized
switchpoints
On-chip protection
Supply transient protection
Reverse-battery protection
On-board voltage regulator
3.5 to 24 V operation
Sensitive Two-Wire Chopper-Stabilized
Unipolar Hall Effect Switches
Continued on the next page…
Functional Block Diagram
Not to scale
Packages: 3 pin SOT23W (suffix LH), and
3 pin SIP (suffix UA)
A1140, A1141, A1142, and A1143
Amp
Regulator
Low-Pass
Filter
GND
VCC
GND
Package UA Only
0.01 uF
V+
Clock/Logic
D
C
S
To All Subcircuits
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| A1141EUATI-T4 | Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches |
| A1141LUATI-T4 | Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches |
| A1142 | Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches |
| A1142ELHLT-T | Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches |
| A1142EUA-T | Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches |
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