参数资料
型号: A1642LKTN-I2-T
元件分类: 磁阻传感器
英文描述: MAGNETIC FIELD SENSOR-HALL EFFECT, 3-100mT, RECTANGULAR, THROUGH HOLE MOUNT
封装: LEAD FREE, SIP-4
文件页数: 2/13页
文件大小: 326K
代理商: A1642LKTN-I2-T
10
A1642LK-DS
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
www.allegromicro.com
Allegro MicroSystems, Inc.
Two-Wire True Zero-Speed Miniature Differential Peak-Detecting Sensor with Continuous Calibration
A1642LK
Power Supply Protection
The device contains an on-chip regulator and can operate over
a wide VCC range. For devices that need to operate from an
unregulated power supply, transient protection must be added
externally. For applications using a regulated line, EMI/RFI pro-
tection may still be required. Contact Allegro Microsystems for
information on the circuitry needed for compliance with various
EMC specications. Refer to gure 7 for an example of a basic
application circuit.
Undervoltage Lockout
When the supply voltage falls below the undervoltage lockout
voltage, VCC(UV), the device enters Reset, where the output state
returns to the Power-On State (POS) until sufcient VCC is sup-
plied. ICC levels may not meet datasheet limits when
VCC < VCC(min).
Assembly Description
This sensor is integrally molded into a plastic body that has been
optimized for size, ease of assembly, and manufacturability.
High operating temperature materials are used in all aspects of
construction.
Diagnostics
The regulated current output is congured for two wire appli-
cations, requiring 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, shown in figure 8 as ICC(High) and ICC(Low). Any
current level not within these ranges indicates a fault condi-
tion. If ICC > ICC(High)max, then a short condition exists, and if
ICC < ICC(low)min, then an open condition exists. Any value of ICC
between the allowed ranges for ICC(High) and ICC(Low) indicates a
general fault condition.
Figure 7: Typical Application Circuit
A1642
VCC
GND
V+
0.01
1
4
F
ECU
Pins 2 and 3 floating
R
100
Ω
SENSE
CBYP
Figure 8: Diagnostic Characteristics of Supply Current Values
ICC(High)max
ICC(High)min
Range for Valid ICC(HIGH)
Range for Valid ICC(LOW)
ICC(Low)max
ICC(Low)min
0
+mA
A
Short
Fault
Open
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