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AH1892
PROGRAMMABLE MICROPOWER OMNIPOLAR
HALL-EFFECT SENSOR SWITCH
 
AH1892 
Document number: DS35092 Rev. 1 - 2 
4 of 11
www.diodes.com
May 2012
?Diodes Incorporated 
 
Electrical Characteristics (cont.)
I
DD
(sleep)
I
DD
(awake)
Tawake
Tperiod
0
Sample and output
latched
Tsleep
 
 
 
Magnetic Characteristics (T
A
 = +25?/SPAN>C, V
DD
= 1.6V to 3.6V, Note 10) 
 
 
 
 
(1mT=10 Gauss)
BSEL
Symbol
Characteristics
Min
Typ
Max
Unit
Low
Bops
LB
(south pole to brand side)
Low Band - Operation Point
18
35
55
Gauss
Low
Bopn
LB
 (north pole to brand side)
-55
-35
-18
Low
Brps
LB
 (south pole to brand side)
Low Band - Release Point
12
25
45
Low
Brpn
LB
 (north pole to brand side)
-45
-25
-12
High
Bops
HB
(south pole to brand side)
High Band - Operation Point
43
60
80
High
Bopn
HB
 (north pole to brand side)
-80
-60
-43
High
Brps
HB
 (south pole to brand side)
High Band - Release Point
35
50
70
High
Brpn
HB
 (north pole to brand side)
-70
-50
-35
-
Bhy (|Bopx|-|Brpx|)
Hysteresis
-
10
-
Notes: 10. Magnetic characteristics may vary with operating temperature and after soldering.
 
The AH1892 includes a band select pin (BSEL) so that the operate (Bops and Bopn) and release (Brps and Brpn) points can be adjusted
between two pre-defined ranges. The BSEL can be hard wired within the application circuit or the band can be selected on the fly by using
the BSEL pin as a logic input. This feature allows the AH1892 sensitivity to be changed by firmware within the application without the addition
of any external components. If the BSEL pin is left open circuit the AH1892 defaults to high band.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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