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What is A1120?

This electronic component, produced by the manufacturer "Allegro", performs the same function as "(A1120 - A1125) Chopper Stabilized Precision Hall Effect Switches".


A1120 Datasheet PDF - Allegro

Part Number A1120
Description (A1120 - A1125) Chopper Stabilized Precision Hall Effect Switches
Manufacturers Allegro 
Logo Allegro Logo 


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A1120, A1121, A1122, and A1125
Chopper Stabilized Precision Hall Effect Switches
Features and Benefits
Unipolar switchpoints
Resistant to physical stress
Superior temperature stability
Output short-circuit protection
Operation from unregulated supply
Reverse battery protection
Solid-state reliability
Small package sizes
Packages:
3-pin SOT23W (suffix LH)
Not to scale
3-pin SIP (suffix UA)
Description
The A1120, A1121, A1122, and A1125 Hall-effect, unipolar
switches are extremely temperature-stable and stress-resistant
sensor ICs, especially suited for operation over extended
temperature ranges to 150°C. Superior high-temperature
performance is made possible through dynamic offset
cancellation, which reduces the residual offset voltage normally
caused by device overmolding, temperature dependencies, and
thermal stress.
Each device includes on a single silicon chip a voltage regulator,
Hall-voltage generator, small-signal amplifier, chopper
stabilization, Schmitt trigger, and a short-circuit protected
open-drain output to sink up to 25 mA.
An on-board regulator permits operation with supply voltages
of 3 to 24 V. The advantage of operating down to 3 V is that
the device can be used in 3 V applications or with additional
external resistance in series with the supply pin for greater
protection against high voltage transient events.
For the A1120, A1121, and A1122, a south pole of sufficient
strength turns the output on. Removal of the magnetic field
turns the output off. The A1125 is complementary, in that for
thesehttp://www.DataSheet4U.net/ devices, a south pole turns the A1125 output off, and
removal of the magnetic field turns the output on.
Two package styles provide a magnetically optimized package
for most applications. Package type LH is a modified SOT23W,
surface mount package, while UAis a three-lead ultra-mini SIP
for through-hole mounting. Each package type is lead (Pb) free
(suffix, –T), with a 100% matte tin plated leadframe.
Functional Block Diagram
VCC
Amp
Regulator
Low-Pass
Filter
To All Subcircuits
Control
Current Limit
VOUT
A1120-DS, Rev. 12
GND
datasheet pdf - http://www.DataSheet4U.net/

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A1120 equivalent
A1120, A1121, A1122
and A1125
Chopper Stabilized Precision Hall Effect Switches
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
Characteristic
Package Thermal Resistance
Symbol
RθJA
Test Conditions
Package LH, 1-layer PCB with copper limited to solder pads
Package LH, 2-layer PCB with 0.463 in.2 of copper area each
side connected by thermal vias
Package UA, 1-layer PCB with copper limited to solder pads
Value Units
228 ºC/W
110 ºC/W
165 ºC/W
Power Derating Curve
TJ(max) = 165ºC; ICC = ICC(max)
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
Package LH, 2-layer PCB
(RQJA = 110 ºC/W)
10
9 Package UA, 1-layer PCB
(R = 165 ºC/W)8
7
QJA
Package LH, 1-layer PCB6
http://www.DataSheet4U.net/
5 (RQJA = 228 ºC/W)
4
3
2
VCC(max)
VCC(min)
20 40 60 80 100 120 140 160 180
Power Dissipation versus Ambient Temperature
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
20
(RPQaJAck=a(Rg1PQe6JaA5Uck=ºAaC1,g/11eW0-Ll)aºHCy,/eW2r-l)PayCeBr PCB
(RPQaJcAk=ag2e2L8HºC, 1/W-la)yer PCB
40 60 80 100 120 140 160 180
Temperature (°C)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
datasheet pdf - http://www.DataSheet4U.net/


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for A1120 electronic component.


Information Total 14 Pages
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Featured Datasheets

Part NumberDescriptionMFRS
A1120The function is Chopper Stabilized Precision Hall Effect Switches. Allegro MicroSystemsAllegro MicroSystems
A1120The function is (A1120 - A1125) Chopper Stabilized Precision Hall Effect Switches. AllegroAllegro
A1121The function is (A1120 - A1125) Chopper Stabilized Precision Hall Effect Switches. AllegroAllegro

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