Diodes AH1892 - Manual (Page 4)

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
NEW PROD
UC
T
Electrical Characteristics (cont.)
I
DD
(sleep)
I
DD
(awake)
Tawake
Tperiod
0
Sample and output
latched
Tsleep
Magnetic Characteristics (T
A
= +25
°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.