A1150, A1152, A1153, A1155, A1156, A1157, and A1158
Chopper-Stabilized, Two-Wire Hall-Effect Switches
AEC-Q100 automotive qualified
High-speed, 4-phase chopper stabilization
Low switchpoint drift throughout temperature range
Low sensitivity to thermal and mechanical stresses
On-chip protection
□
Supply transient protection
□
Reverse-battery protection
□
On-board voltage regulator
□
3 to 24 V operation
• Solid-state reliability
• Robust EMC and ESD performance
• Industry-leading ISO 7637-2 performance through use of
proprietary, 40 V clamping structures
Continued on the next page…
•
•
•
•
•
FEATURES AND BENEFITS
The A1150, A1152, A1153, A1155, A1156, A1157, and A1158
comprise a family of two-wire, unipolar, Hall-effect switches,
which are factory-trimmed to optimize magnetic switchpoint
accuracy. These devices are produced on the Allegro™ advanced
BiCMOS wafer fabrication process, which implements a
high-frequency, 4-phase, chopper-stabilization technique. This
technique achieves magnetic stability over the full operating
temperature range, and eliminates offsets inherent in devices
with a single Hall element that are exposed to harsh application
environments.
The A115x family has a number of automotive applications.
These include sensing seat track position, seat belt buckle
presence, hood/trunk latching, and shift selector position.
Two-wire unipolar switches are particularly advantageous in
cost-sensitive applications because they require one less wire
for operation versus the more traditional open-collector output
switches. 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.
All family members are offered in three package styles. The
LH is a SOT-23W style, miniature, low profile package for
surface-mount applications. The UA is a 3-pin, ultra-mini, single
inline package (SIP) for through-hole mounting. The UB is a
2-pin, ultra-mini, single inline package (SIP) for through-hole
mounting. All three packages are lead (Pb) free, with 100%
matte-tin leadframe plating.
UB package only
DESCRIPTION
PACKAGES
3-pin SOT23-W
2 mm × 3 mm × 1
mm (suffix LH)
3-pin ultramini SIP
1.5 mm × 4 mm × 3
mm (suffix UA)
2-pin ultramini SIP
1.5 mm × 4 mm × 4
mm (suffix UB)
Approximate footprint
0.1 µF
V+
VCC
Regulator
To all subcircuits
LH & UA
package
only
Clock/Logic
Sample and Hold
Dynamic Offset
Cancellation
0.01 µF
Low-Pass
Filter
Schmitt
Trigger
Polarity
Amp
GND
UA package only
GND
Functional Block Diagram
A1152-DS, Rev. 11
MCO-0000485
August 9, 2018
A1150, A1152, A1153, A1155,
A1156, A1157, and A1158
Chopper-Stabilized, Two-Wire
Hall-Effect Switches
FEATURES AND BENEFITS (continued)
• Extended Operating Ambient temperature range,
–40°C to 150°C
• UB package with integrated 0.1 µF bypass capacitor
SELECTION GUIDE
Part Number
A1150LLHLX-T
A1150LUA-T
A1152LLHLX-T
A1152LUA-T
A1152LUBTN-T
A1153LLHLX-T
A1153LUA-T
A1153LUBTN-T
A1155LLHLX-T
A1155LUA-T
A1155LUBTN-T
A1156LLHLX-T
A1156LUA-T
A1156LUBTN-T
A1157LLHLX-T
A1157LLHLT-T
A1157LUA-T
A1158LLHLX-T
A1158LLHLT-T
A1158LUA-T
Packing
13-in. reel, 10 000 pieces/reel
Bulk, 500 pieces/bag
13-in. reel, 10 000 pieces/reel
Bulk, 500 pieces/bag
13-in. reel, 4 000 pieces/reel
13-in. reel, 10 000 pieces/reel
Bulk, 500 pieces/bag
13-in. reel, 4 000 pieces/reel
13-in. reel, 10 000 pieces/reel
Bulk, 500 pieces/bag
13-in. reel, 4 000 pieces/reel
13-in. reel, 10 000 pieces/reel
Bulk, 500 pieces/bag
13-in. reel, 4 000 pieces/reel
13-in. reel, 10 000 pieces/reel
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
13-in. reel, 10 000 pieces/reel
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
Package
3-pin SOT23W surface mount
3-pin SIP through hole
3-pin SOT23W surface mount
3-pin SIP through hole
2-pin SIP through hole
3-pin SOT23W surface mount
3-pin SIP through hole
2-pin SIP through hole
3-pin SOT23W surface mount
3-pin SIP through hole
2-pin SIP through hole
3-pin SOT23W surface mount
3-pin SIP through hole
2-pin SIP through hole
3-pin SOT23W surface mount
3-pin SOT23W surface mount
3-pin SIP through hole
3-pin SOT23W surface mount
3-pin SOT23W surface mount
3-pin SIP through hole
High
Low
2 to 5
20 to 80
High
5 to 6.9
Low
5 to 6.9
20 to 60
High
5 to 6.9
Low
5 to 6.9
50 to 110
Output (I
CC
) in
South Polarity
Field
Low
Supply Current
at I
CC(L)
(mA)
2 to 5
Magnetic Operate
Point, B
OP
(G)
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
2
A1150, A1152, A1153, A1155,
A1156, A1157, and A1158
Chopper-Stabilized, Two-Wire
Hall-Effect Switches
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Characteristic
Forward Supply Voltage
Reverse Supply Voltage
Magnetic Flux Density
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Symbol
V
CC
V
RCC
B
T
A
T
J
(max)
T
stg
Range L
Notes
Rating
28
–18
Unlimited
–40 to 150
165
–65 to 170
Unit
V
V
G
°C
°C
°C
PINOUT DIAGRAMS AND TERMINAL LIST TABLE
3
LH and UA Terminal List Table
Number
NC
Name
LH package
VCC
UA package
VCC
Function
Input power supply
LH package: no connection,
it is highly recommended that
this pin be tied to GND
[1]
UA package: ground terminal
1
1
2
3
1
2
2
NC
GND
LH Package
[1]
UA Package
3
GND
GND
Ground terminal
UB Terminal List Table
Number
1
2
1
2
Name
VCC
GND
Ground terminal
Function
Input power supply
UB Package
[1]
Package style LH pin 2 is not internally connected to the IC ground and therefore should not be used as a ground reference pin. For maximum EMC and ESD robustness
it is highly recommended that this pin be tied to ground.
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
3
A1150, A1152, A1153, A1155,
A1156, A1157, and A1158
Chopper-Stabilized, Two-Wire
Hall-Effect Switches
ELECTRICAL CHARACTERISTICS
: Valid at T
A
= –40°C to 150°C, T
J
< T
J
(max), C
BYP
= 0.01 µF, through operating supply
voltage range, unless otherwise noted
Characteristics
Supply Voltage
[1][2]
Symbol
V
CC
A1150, A1157
I
CC(L)
Supply Current
I
CC(H)
Supply Zener Clamp Voltage
Supply Zener Clamp Current
Reverse Supply Current
V
Z(sup)
I
Z(sup)
I
RCC
A1158
A1152, A1155
A1153, A1156
A1150, A1152,
A1155, A1157
A1153, A1156,
A1158
Test Conditions
Operating, T
J
≤ 165 °C
B > B
OP
B < B
RP
B > B
OP
B < B
RP
B < B
RP
B > B
OP
28
–
–
–
–
–
A1150, A1152,
A1155, A1157
A1153, A1156,
A1158
B > B
OP
+ 10 G
–
B < B
RP
– 10 G
–
I
CC(H)
–
–
–
25
µs
–
–
–
90
0.22
700
–
I
CC(L)
(max)
+ 3 mA
–1.6
–
–
–
V
mA
mA
mA / µs
mA / µs
kHz
Min.
3.0
2.0
5
Typ.
–
–
–
Max.
24
5.0
6.9
Unit
V
mA
mA
12
–
17
mA
I
CC(L)
(max) + 3 mA, T
A
= 25°C
V
Z(sup)
= 28 V
V
RCC
= –18 V
LH
and
UA
UB
No bypass capacitor, capacitance of
probe C
S
= 20 pF
Integrated bypass capacitor,
capacitance of probe C
S
= 20 pF
Output Slew
Rate
[3]
di/dt
Chopping Frequency
Power-Up Time
[4][5]
Power-Up State
[2][4][6][7]
[1]
V
CC
[2]
The
f
c
t
on
POS
t
on
< t
on
(max) , V
CC
slew rate > 25 mV / µs
represents the generated voltage between the VCC pin and the GND pin.
V
CC
slew rate must exceed 600 mV/ms from 0 to 3 V. A slower slew rate through this range can affect device performance.
[3]
Measured without bypass capacitor between VCC and GND. Use of a bypass capacitor results in slower current change.
[4]
Power-Up Time is measured without and with bypass capacitor of 0.01 µF. Adding a larger bypass capacitor would cause longer Power-Up Time.
[5]
Guaranteed by characterization and design.
[6]
Power-Up State as defined is true only with a V
CC
slew rate of 25 mV / µs or greater.
[7]
For t > t
and B
RP
< B < B
OP
, Power-Up State is not defined.
on
MAGNETIC CHARACTERISTICS
[1]
:
Valid at T
A
= –40°C to 150°C, T
J
< T
J
(max), unless otherwise noted
Characteristics
Magnetic Operating Point
Symbol
B
OP
A1155, A1156
A1157, A1158
A1150, A1152, A1153
Magnetic Release Point
Hysteresis
[1]
Relative
Test Conditions
A1150, A1152, A1153
Min.
50
20
20
45
10
10
5
Typ.
–
–
–
–
–
–
–
Max.
110
60
80
105
55
60
30
Unit
[2]
G
G
G
G
G
G
G
B
RP
B
HYS
A1155, A1156
A1157, A1158
values of B use the algebraic convention, where positive values indicate south magnetic polarity, and negative values indicate north magnetic polarity; therefore
greater B values indicate a stronger south polarity field (or a weaker north polarity field, if present).
[2]
1 G (gauss) = 0.1 mT (millitesla).
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
4
A1150, A1152, A1153, A1155,
A1156, A1157, and A1158
Chopper-Stabilized, Two-Wire
Hall-Effect Switches
THERMAL CHARACTERISTICS:
may require derating at maximum conditions; see application information
Characteristic
Symbol
Test Conditions*
Package LH, on 1-layer PCB with copper limited to solder pads
Package Thermal Resistance
R
θJA
Package LH, on 2-layer PCB with 0.463 in.
2
of copper area each side
Package UA, on 1-layer PCB with copper limited to solder pads
Package UB, on 1-layer PCB with copper limited to solder pads
*Additional thermal information available on the Allegro website
[i=s]This post was last edited by jameswangsynnex on 2015-3-3 20:03[/i]Viewpoint: Currently, smart phones and tablets are popular all over the world, driving the rapid development of the entire mobile...
I laughed my ass off after reading this, sharing with you all:) My buddy went to Microsoft for an interview, and was kicked out after the first sentence! So depressed! Examiner: What is the retail pri...
Transplanted 2440 serial port driver to WinCE6. After the system started, the serial port driver was loaded and it crashed. The trace was as follows. BOOL CReg2440Uart::Init() { if (m_pReg) { // Set V...
How do you know if a machine is operating properly? The answer: by leveraging deep learning to detect anomalies in routine vibration data from industrial machines. Anomaly detection has many uses, ...[Details]
What is "Car Electronic Fence"
Fleet managers can define a graphical area (regular or irregular) or divide it into administrative zones in Yamei Technology's vehicle backend management system ...[Details]
When we travel in cities, we all find that electric vehicles have many advantages. As a means of transportation, they can also fulfill their mission well. Now, more and more residential communities...[Details]
Recently, Tesla released the "Tesla Car Voice Assistant Terms of Use", announcing that the car voice assistant will be connected to the Doubao large model (Skylark large model) and DeepSeek Chat pr...[Details]
Spark plugs are an indispensable device for engines. As the saying goes, without spark plugs, the engine cannot work properly. The serious consequence is that when driving at high speeds, the engin...[Details]
Before understanding single-phase control transformers, let's briefly understand what a single-phase transformer is. A single-phase transformer uses a single-phase input. Compared to a three-phase ...[Details]
On August 21, according to a report by Korean media SEDaily yesterday, according to semiconductor industry sources, the HBM4 samples provided by Samsung to Nvidia last month have passed initial tes...[Details]
New version helps developers build secure and trustworthy embedded systems
Shanghai, China—August 21, 2025—
QNX, a division of BlackBerry Ltd., today announced the release of QNX...[Details]
The second-generation Snapdragon W5+ and second-generation Snapdragon W5 platforms support users sending and receiving messages via satellite when there is no cellular and Wi-Fi coverage.
...[Details]
Qiangmao, your trusted semiconductor solutions partner, sincerely invites you to visit Electronics India 2025, South Asia's leading trade show for electronic components, systems, applications...[Details]
Cadence and NVIDIA Collaborate to Revolutionize Power Analysis Technology, Accelerating Development of Billion-Gate AI Designs
Cadence's new Palladium Dynamic Power Analysis applicat...[Details]
The practice of warming up a car originated with gasoline-powered vehicles. Warming up the engine allows it to enter a better working state and ensures good lubrication. This has become a habit for...[Details]
Today, the voltage of electronic products continues to rise to 400V, 600V and even 1000V, so there are few electronic load models that can handle such high voltages. Many people consider connecting...[Details]
With rapid economic development, the types of pollution sources are increasing, especially in chemical and industrial zones and their surroundings. The patterns of pollution and the types of ecolog...[Details]
EVTank predicts that all-solid-state batteries will achieve small-scale mass production in 2027 and large-scale shipments by 2030. Global solid-state battery shipments will reach 614.1GWh, of which...[Details]
Power technology
京公网安备 11010802033920号
EEWORLD
