A1120 Datasheet PDF - Allegro
Part Number | A1120 | |
Description | (A1120 - A1125) Chopper Stabilized Precision Hall Effect Switches | |
Manufacturers | Allegro | |
Logo | ||
There is a preview and A1120 download ( pdf file ) link at the bottom of this page. Total 14 Pages |
Preview 1 page No Preview Available ! 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/
|
|
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/
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for A1120 electronic component. |
Information | Total 14 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ A1120.PDF Datasheet ] |
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