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A1181 Datasheet(PDF) 2 Page - Allegro MicroSystems

Part No. A1181
Description  Two-Wire, Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switch
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
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A1181 Datasheet(HTML) 2 Page - Allegro MicroSystems

 
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TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY
(PRELIMINARY INFORMATION – SUBJECT TO CHANGE)
Rev. 1.8 25 April 2003
Page 2
115 Northeast Cutoff, Box 15036
Worcester, Massachus etts 01615-0036 (508) 853-5000
Copyright © 1993, 1995 Allegro MicroSystems, Inc.
CHARACTERISTICS
Valid over operating temperature range unless otherwise noted.
Limits
Part Number
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Units
ELECTRICAL CHARACTERISTICS
A118X FAMILY
Supply Voltage
VCC
Operating
3.8
-
24
V
IGND(L)
Output I Low
5
-
6.9
mA
A1182/3/4
Supply Current
IGND(H)
Output I High
12
-
17
mA
IGND(L)
Output I Low
2
-
5
mA
A1180/1
2
Supply Current
IGND(H)
Output I High
12
-
17
mA
Output Rise Time
3
tr
RL=100 Ohms,
CBYP=0.1uF
-
20
-
us
Output Fall Time
3
tf
RL=100 Ohms,
CBYP=0.1uF
-
20
-
us
Chopping Frequency
fC
-
-
340
-
kHz
Power-Up Time
ton
-
-
-
25
µs
Power-Up State
POS
t < ton, tr < 5us,
no bypass capacitor
-
HIGH
-
-
A118X
Zener Voltage
VZ
I = 10mA
28
36
40
V
MAGNETIC CHARACTERISTICS
Minimum Programmable
Operate Point
BOPmin
60
G
Maximum Programmable
Operate Point
BOPmax
B>Bop,
IGND=Low (A1180/2)
IGND=High (A1181/3)
200
G
A1180/1/2/3
4
Switch Point Step Size
BRES
-
8
G
Minimum Programmable
Operate Point
BOPmin
300
G
Maximum Programmable
Operate Point
BOPmax
B>Bop,
IGND=High (A1184)
600
G
A1184
5
Switch Point Step Size
BRES
-
16
G
Switch Point
-
5
-
Bit(s)
Number of Programming
Bits
-
Programming Lock
-
1
-
Bit(s)
Temperature Drift of BOP
∆B
OP
A1180-A1183
+/-20
G
A118X
Hysterisis
BHYS
BOP - BRP
5
15
30
G
2 These are the A3161 current levels.
3 Typical rise and fall time of the Hall sensor is 1us, the true rise and fall time is dependent on the load circuit as indicated by the 20us specification.
4
Programming is typically performed at Ta = 25°C and does not take into account temperature drift of the switch point. See
∆BOP.
5
Programming is typically performed at Ta = 25°C and does not take into account temperature drift of the sw itch point.
∆BOP has not yet been
characterized for the A1184 and may require additional tolerance due to the high magnetic switch points.


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