AH375
Single Phase Hall Effect Latch
Features
- 2.2V to 20V DC operation voltage
- Temperature compensation
- Wide operating voltage range
- Open drain pre-driver
- 25mA maximum sinking output current
- Package: SIP3, SOT23
General Description
AH375 is an integrated Hall effect latched sensor
designed for electronic commutation of brush-less
DC motor applications. The device includes an
on-chip Hall voltage generator for magnetic sensing,
a comparator that amplifies the Hall voltage, and a
schmitt trigger to provide switching hysteresis for
noise rejection, and open drain output. An internal
bandgap regulator is used to provide temperature
compensated supply voltage for internal circuits
and allows a wide operating supply range.
If a magnetic flux density larger than threshold Bop,
DO is turned on(low). The output state is held until
a magnetic flux density reversal falls below Brp
causing DO to be turned off (high).
Applications
- Brush-less DC Motor
- Brush-less DC Fan
- Revolution counting
- Speed measurement
Pin Assignments
375
Pin Descriptions
Name
Vdd
GND
OUT
P/I/O
P
P
O
Pin #
1
2
3
Description
Positive Power Supply
Ground
Output Pin
2
(Top view)
375
1 : Vdd
1
3
2 : GND
3 : OUT
(SOT23 package)
1 2 3
(SIP package)
Ordering Information
AH375 X - X X X
Wafer Body
Blank or
A~Z : if necessary
to specify
Package
P: SIP3
W: SOT23
Lead
L : Lead Free
Packing
Blank : Bulk
A : Tape & Reel
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev.1.3 Jan. 09, 2006
1/6
AH375
Single Phase Hall Effect Latch
Absolute Maximum Ratings
Characteristics
Supply Voltage
Magnetic Flux Density
Output OFF Voltage
Output “On” Current
Continuous
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temp.
SIP-3L
Package Power Dissipation
SOT23-3L
SIP-3L
Thermal Resistance
SOT23-3L
( at Ta=25
o
C )
Symbol
Vdd
B
V
DS
Id
Ta
Ts
Tj
Pd
θjc
(Ta=+ 25°C, Vdd =12V)
Test Conditions
—
Iout=20mA
V
DD
=14V
Output Open
RL=820Ω, CL=20Pf
RL=820Ω, CL=20pF
Min
2.2
-
-
-
-
-
Typ
-
300
<0.1
2
0.1
0.1
Max
20
700
10
4
1
1
Units
V
mV
uA
mA
us
us
Values
20
Unlimited
30
25
-40~+125
-65~+150
150
550
230
227
543
Unit
V
V
mA
°C
°C
°C
mW
mW
°C/W
Electrical Characteristics
Characteristic
Supply Voltage
Output Saturation Voltage
Output Leakage Current
Supply Current
Output Rise Time
Output Falling Time
Symbol
Vdd
Vds(sat)
Ioff
Idd
tr
tf
Test Circuit
12V
OUT
RL
RL=820 Ohm
CL=20 pF
CL
Test Circuit
Magnetic Characteristics
Parameter
Operate Point
Release Point
Hysteresis
(Ta=25°C, Vdd =2.5V to 20V)
(1mT=10Gauss)
Max.
Unit
60
Gauss
-5
Gauss
-
Gauss
Symbol
Bop
Brp
Bhys
Min.
5
-60
-
Typ.
30
-30
60
Anachip Corp.
www.anachip.com.tw
3/6
Rev.1.3 Jan. 09, 2006
AH375
Single Phase Hall Effect Latch
Output
S
S
Marking side
( Output Voltage )
( off-state )
Vdd
Marking side
Turn off
B
h
y
Turn on
( on-state )
N
( SOT23 )
N
( SIP3 )
V
sat
B
rp
0
V
sat
B
op
( Magnetic flux density B )
Performance Characteristics (SIP3)
Ta (°C)
Pd (mW)
Ta (°C)
Pd (mW)
P d (m W )
600
500
400
300
200
100
0
0
25
50
75
100
125
150
T a (。 C )
25
550
105
198
50
440
110
176
60
396
115
154
70
352
120
132
80
308
125
110
85
286
130
88
90
264
135
66
95
242
140
44
100
220
150
0
P o w e r D is s ip a tio n C u rv e
Performance Characteristics (SOT23-3)
Ta (°C)
Pd (mW)
25
230
50
184
60
166
70
147
80
129
90
110
100
92
110
74
120
55
125
46
130
37
140
18
150
0
P d (m W )
P o w e r D is s ip a tio n C u rv e
300
200
100
0
0
25
50
75
100
125
150
T a (。 C )
Anachip Corp.
www.anachip.com.tw
4/6
Rev.1.3 Jan. 09, 2006
Embedded System
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