OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

AH1892-Z-7

P1-P3P4-P6P7-P9P10-P11
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 PRODUCT
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.
AH1892
PROGRAMMABLE MICROPOWER OMNIPOLAR
HALL-EFFECT SENSOR SWITCH
AH1892
Document number: DS35092 Rev. 1 - 2
5 of 11
www.diodes.com
May 2012
© Diodes Incorporated
NEW PRODUCT
Application Note
Applications Circuit One – Low Band
Connecting the BSEL pin to ground permanently configures the AH1892 into its high sensitivity mode, requiring a reduced magnetic flux
density to activate its output (Low Band).
Applications Circuit Two – High Band
Connecting the BSEL pin to Vdd or to a voltage greater than 1.4V or leaving the BSEL pin unconnected configures the AH1892 into its low
sensitivity mode, requiring a higher magnetic flux density to activate its output (High Band).
Applications Circuit Three – Adjustable Sensitivity
To enhance flexibility within the application, the sensitivity can be adjusted with a standard logic signal allowing it to be controlled by a micro-
controller or a logic source. This allows the sensitivity to be changed within the application without a hardware change. Whenever the
sensitivity band selection is changed, the band selection changeover should be allowed to complete for the output to be valid.
AH1892
PROGRAMMABLE MICROPOWER OMNIPOLAR
HALL-EFFECT SENSOR SWITCH
AH1892
Document number: DS35092 Rev. 1 - 2
6 of 11
www.diodes.com
May 2012
© Diodes Incorporated
NEW PRODUCT
Application Note (cont.)
Bands Select Change Timing and Valid Output
Whenever band selection BSEL pin input is changed, allow for band selection changeover to complete and stabilize. The output is valid only
after the second complete operating ‘awake’ phase. Time taken for the output to be valid, after the BSEL change, depends on timing of
BSEL change during the sleep and awake phase; this time can range from 100ms typical and 200.1ms maximum.
P1-P3P4-P6P7-P9P10-P11

AH1892-Z-7

Mfr. #:
Buy AH1892-Z-7
Manufacturer:
Description:
Magnetic Sensors Board Mount Hall Effect / Magnetic Sensors MicroPWR Hall Effect 1.6V to 3.6V 4.3uA
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet