Ah1887 – Diodes AH1887 User Manual
Page 3
AH1887
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
AH1887
Document number: DS31313 Rev. 4 - 2
3 of 7
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
(
O
ut
p
u
t
V
ol
ta
ge
)
B
opn
B
rpn
0
( Magnetic flux density B )
Output2
Turn on
Turn off
( off-state )
( on-state )
B
hy
V
sat
V
dd
(
O
ut
p
u
t
V
ol
ta
ge
)
B
rps
B
ops
0
( Magnetic flux density B )
Output1
Turn off
Turn on
( off-state )
( on-state )
N
N
S
S