參數(shù)資料
型號(hào): A3197LLT
廠商: Allegro MicroSystems, Inc.
英文描述: PROTECTED, HIGH-TEMPERATURE, OPEN-COLLECTOR HALL-EFFECT LATCH
中文描述: 保護(hù),高溫,集電極開(kāi)路霍爾效應(yīng)鎖存
文件頁(yè)數(shù): 9/12頁(yè)
文件大?。?/td> 193K
代理商: A3197LLT
3197
PROTECTED, HIGH-TEMP.,
OPEN-COLLECTOR
HALL-EFFECT LATCH
www.allegromicro.com
APPLICATIONS INFORMATION
The A3197LLT and A3197LU latches have been optimized for
use in automotive ring magnet sensing applications. Such applications
include transmission speed sensors, motor position encoders, and wheel
bearing speed sensors. Special care has been taken to optimize the
operation of these devices in automotive subsystems that require ISO
DP9637 protection but NOT operation. Undervoltage lockout is in-
cluded to prevent propagation of false logic pulses during low battery,
cold-start conditions. Noise suppression is included to prevent false
switching of the device when subjected to ISO transients. Short-circuit
protection is included to prevent damage caused by pinched wiring
harnesses.
A typical application consists of a ferrite ring magnet located on a
rotating shaft. Typically, this shaft is attached to the transmission, the
sensor is mounted on a board, with care being taken to keep a tight
tolerance on the air gap between the package face and the magnet. The
device will provide a change in digital state at the transition of every
magnetic pole and, thus, give an indication of the transmission speed.
The high magnetic hysteresis allows the device to be immune to vibra-
tion of the magnet shaft and relatively good duty cycles can be obtained.
Hall effect applications information is available in the “Hall-Effect
IC Applications Guide”, which can be found in the
Allegro
MicroSystems Electronic Data Book
, AMS-702, or
Application Note
2770, or at
www.allegromicro.com.
SENSOR LOCATIONS
(
±
0.005" [0.13 mm] die placement)
SUFFIX “LT”
SUFFIX “U”
A
1
3
2
Dwg. MH-008-5A
0.030"
0.76 mm
NOM
ACTIVE AREA DEPTH
0.051"
1.30 mm
0.092"
2.35 mm
A
1
3
Dwg. MH-002-12A
0.015"
0.38 mm
NOM
0.073"
1.85 mm
BRANDED
SURFACE
ACTIVE AREA DEPTH
2
0.094"
2.40 mm
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