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A1233 Schematic ( PDF Datasheet ) - Allegro

Teilenummer A1233
Beschreibung Dual-Channel Hall-Effect Direction Detection Sensor IC
Hersteller Allegro
Logo Allegro Logo 




Gesamt 12 Seiten
A1233 Datasheet, Funktion
A1233
Dual-Channel Hall-Effect Direction Detection Sensor IC
Features and Benefits
AEC-Q100 automotive qualified
Precisely aligned dual Hall elements
▪ Tightly matched magnetic switchpoints
Speed and direction outputs
Individual Hall element outputs (L package)
Output short-circuit protection
▪ Operation from an unregulated power supply
Wide operating temperature range
Wide operating voltage range
▪ Integrated EMC-ESD protection
Superior temperature stability and industry-leading
jitter performance through use of advanced chopper
stabilization topology
Packages
4-pin SIP (suffix K)
8-pin SOIC (suffix L)
Not to scale
Description
The A1233 is a dual-channel Hall-effect sensor IC ideal for
use in speed and direction sensing applications incorporating
encoder ring-magnet targets.TheA1233 provides various output
signals that indicate speed and direction of target rotation. The
Hall elements are both photolithographically aligned to better
than 1 μm. Maintaining accurate displacement between the two
active Hall elements eliminates the major manufacturing hurdle
encountered in fine-pitch detection applications. The A1233 is
a highly sensitive, temperature-stable magnetic device ideal for
use in harsh automotive and industrial environments.
The Hall elements of the A1233 are spaced 1.63 mm apart,
which provides excellent speed and direction information
for small-geometry targets. Extremely low-drift amplifiers
guarantee symmetry between the switches to maintain signal
quadrature. An on-chip regulator allows the use of this device
over a wide operating voltage range of 3.5 to 24 V.
End-of-line trimming of the Hall element switchpoints provides
tight matching capability. The Allegropatented, high-
frequency chopper stabilization technique cancels offsets in
each channel, providing stable operation over the full specified
temperature and voltage ranges.
Continued on the next page…
VCC
Channel A
Hall
Element
E1
Functional Block Diagram
Programmable
Trim
LDO Regulator
2 Bit
Amp
Low-
Pass
Filter
Direction
Logic
L Package Only
Output
Drive
Output
Drive
OUTA
DIR
Channel B
Hall
Element
E2
Amp
Low-
Pass
Filter
2 Bit
Output
Drive
L Package Only
Output
Drive
SPD
OUTB
A1233-DS, Rev. 1
GND






A1233 Datasheet, Funktion
A1233
Dual-Channel Hall-Effect Direction Detection Sensor IC
Characteristic Performance Data
Supply Current versus Ambient Temperature
7.5
6.5
5.5
VCC = 24 V
4.5
VCC = 12 V
3.5 VCC = 3.5 V
2.5
-60 -40 -20 0
20 40 60 80 100 120 140 160
TA (°C)
Low Output Voltage versus Ambient Temperature
VCC = 12 V
500
450
400
350
300
250
200
150
100
50
0
-60 -40 -20
0
20 40 60 80 100 120 140 160
TA (°C)
Release Point versus Ambient Temperature
35
25 VCC (V)
3.5
15 12
24
5
-5
-15
-25
-35
-45
-55
-60 -40 -20 0
20 40 60 80 100 120 140 160
TA (°C)
Supply Current versus Supply Voltage
TA = 25°C
7.5
6.5
5.5
4.5
3.5
2.5
0
5 10 15 20 25 30
VCC (V)
Operate Point versus Ambient Temperature
55
45
35
25
15
5
-5 VCC (V)
-15
3.5
12
-25 24
-35
-60 -40 -20
0
20 40 60 80 100 120 140 160
TA (°C)
Switchpoint Hysteresis versus Ambient Temperature
60
55 VCC (V)
3.5
50 12
24
45
40
35
30
25
20
15
10
-60 -40 -20
0
20 40 60 80 100 120 140 160
TA (°C)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6

6 Page









A1233 pdf, datenblatt
A1233
Dual-Channel Hall-Effect Direction Detection Sensor IC
Revision History
Revision
1
Revision Date
January 15, 2013
September 21, 2015
Description of Revision
Initial Release
Added AEC-Q100 qualification under Features and Benefits
Copyright ©2015, Allegro MicroSystems, LLC
Allegro MicroSystems, LLC reserves the right to make, from time to time, such departures from the detail specifications as may be required to
permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that
the information being relied upon is current.
Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of
Allegro’s product can reasonably be expected to cause bodily harm.
The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no responsibility for its
use; nor for any infringement of patents or other rights of third parties which may result from its use.
For the latest version of this document, visit our website:
www.allegromicro.com
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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