AH1887
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
AH1887
Document number: DS31313 Rev. 4 - 2
3 of 7
www.diodes.com
August 2010
© Diodes Incorporated
Electrical Characteristics (T
A
= 25°C, Vdd = 1.8V, unless otherwise specified)
Symbol Characteristic Conditions Min Typ. Max Unit
V
OH
Output On Voltage (High side) I
O
= -0.5mA Vdd-0.2 - - V
V
OL
Output On Voltage (Low side) I
O
= 0.5mA - - 0.2 V
Idd(en)
Supply Current
Chip enable - 2 4 mA
Idd(dis) Chip disable - 5 8 uA
Idd(avg) average supply current - 7 12 uA
Tawake Awake Time - 50 100 µs
Tperiod Period - 50 100 ms
D.C. Duty Cycle - 0.1 - %
Magnetic Characteristics (T
A
= 25°C, Vdd = 1.8V~3.0V, Note 2, 3, 4)
(1mT=10 Gauss)
Symbol Characteristic Min Typ. Max Unit
Bops(south pole to brand side)
Operate Point
- 35 50
Gauss
Bopn(north pole to brand side) -50 -35 -
Brps(south pole to brand side)
Release Point
6 20 -
Brpn(north pole to brand side) - -20 -6
Bhy(|Bopx|-|Brpx|) Hysteresis 3 15 -
Notes: 2. Typical data is at Ta = 25°C, Vdd = 3V, and for design information only.
3. Bops & Brps for Output 1 responds to South pole; Bopn & Brpn for Output 2 responds to North pole.
4. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
B
hy
V
sat
V
dd
( Output Voltage )
B
opn
B
rpn
0
( Magnetic flux density B )
Output2
Turn on
Turn off
( off-state )
( on-state )
B
hy
V
sat
V
dd
( Output Voltage )
B
rps
B
ops
0
( Magnetic flux density B )
Output1
Turn off
Turn on
( off-state )
( on-state )
NNS
S
