A1421LK-T Allegro Microsystems Inc, A1421LK-T Datasheet - Page 2

• Manufacturer Part Number: A1421LK-T
• Description: IC,HALL-EFFECT SENSOR,SINGLE-ENDED,SIP,4PIN,PLASTIC
• Manufacturer: Allegro Microsystems Inc
• Type: Special Purposer

Specifications of A1421LK-T

• Rohs Compliant: YES
• Sensing Range: 27.5G Trip, -12.5G Release
• Voltage - Supply: 4 V ~ 26.5 V
• Current - Supply: 7mA
• Current - Output (max): 25mA
• Output Type: Digital, Open Collector
• Features: High Precision
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 4-SIP
• Magnetic Type: Monolithic
• Operating Supply Voltage (min): 4V
• Operating Supply Voltage (typ): 12V
• Operating Supply Voltage (max): 26.5V
• Output Current: 25mA
• Mag Sensor Operate Point (g): 27.5Gs
• Mag Sensor Release Point (g): -12.5Gs
• Mag Sensor Hysteresis(g): 15Gs
• Package Type: SIP
• Pin Count: 4
• Mounting: Through Hole
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

A1421, A1422,
and
Absolute Maximum Ratings
Description (continued)
Each device includes: a voltage regulator, two Hall transduc-
ers, temperature compensating circuitry, a low-level ampli-
fier, bandpass filter, Schmitt trigger, and an output driver. The
on-board regulator permits operation with supply voltages from
4.0 to 26.5 V. The output stage can switch 20 mA over the full
frequency response range of the device, and is compatible with
CMOS logic circuits.
Supply Voltage
Reverse Supply Voltage
Output Current
Reverse-Output Current
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Product Selection Guide
A1421LK-T
A1422LK-T
A1423LK-T
*
Part Number
Contact Allegro for additional packing options.
Pin-out Diagram
A1423
1
2
Characteristic
3
4
High (Off) to
High (Off) to
Low (On) to
Increasing
High (Off)
Low (On)
Low (On)
B
Output Switching
Diff
at B
DIFF
High (Off) to
Decreasing
Low (On) to
Low (On) to
= 0
Terminal List Table
High (Off)
High (Off)
Low (On)
Number
B
Diff
1
2
3
4
Symbol
High Precision Hall Effect AC-Coupled Differential
T
I
V
V
I
ROUT
J(max)
T
OUT
T
RCC
CC
stg
A
Name
VOUT
TEST
B
GND
VCC
Refer to Power Derating section
Range L
OP(typ)
(G)
Switchpoints
15
15
65
Sensor IC with Integrated Filter Capacitor
B
Notes
RP(typ)
–15
–65
(G)
0
Continued on the next page…
The devices in this family differ from each other in their
switchpoint specifications and their switching polarity. The
A1421 has a small hysteresis and asymmetrical switchpoints,
with one switchpoint at the zero-crossing. The A1422 has a small
hysteresis and symmetrical switchpoints, both near the zero-
crossing. The A1423 offers high vibration immunity, by means
of its larger hysteresis that establishes symmetrical switchpoints
B
B
OP(max)
RP(min)
(G)
15
0
0
+
Symmetry
B
–40 to 150
–65 to 170
B
OP(typ)
Rating
RP(typ)
(G)
15
–18
–50
165
0
0
28
25
+
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
B
B
OP(min)
RP(max)
(G)
7.5
0
0
Units
mA
mA
ºC
ºC
ºC
V
V
+
pieces/bag
Packing
Bulk, 500
*
2