Inverted Output Hall Effect Latch For High Temperature
Features
- Bipolar Hall effect latch sensor
- 3.5V to 20V DC operation voltage
- Open collector pre-driver
- 25mA output sink current
- Chip power reverse-connection protection
- Operating temperature:
−
40
°
C ~
+
125
°
C
- Package: SIP3, SOT23
General Description
AH174 is a single-digital-output Hall-effect sensor
for high temperature operation. The device includes
an on-chip Hall voltage generator for magnetic
sensing, an amplifier to amplify Hall voltage, and a
comparator to provide switching hysteresis for noise
rejection, and an open-collector output pre-driver.
An internal bandgap regulator is used to provide
temperature compensated supply voltage for
internal circuits and allows a wide operating supply
range. While the magnetic flux density (B) is larger
than threshold Bop, the
OUT
pin turns off (High).
If B removed toward Brp, the
OUT
pin is latched
“off” state prior to B < Brp. When B < Brp, the
OUT
pin go into “ on ” state.
Applications
- Rotor position sensing
- Current switch
- Encoder
- RPM detection
Pin Assignment
(Top view)
3.
OUT
2. GND
1. VCC
(SIP3 package)
Pin Descriptions
Name
Description
VCC
GND
OUT
Input power
Ground
Inverted output stage
3.
OUT
GND 2.
1. VCC
( SOT23 package)
Ordering Information
AH174 X - X X X - X
Wafer Body
Blank or
A~Z : if necessary
to specify
Package
P: SIP3
W: SOT23
Lead
L : Lead Free
Blank: Normal
Packing
Blank : Tube
A : Taping
Magnetic
Characteristics
A or B
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. 0.7 May 7, 2004
1/6
AH174
Inverted Output Hall Effect Latch For High Temperature
Block Diagram
VCC
1
REG.
3
AMP
OUT
2
GND
Application Circuit
I
A
I
B
M
Digital Hall Effect Sensor
M: Three Phase Hall Motor
Driver
&
Control Logic
I
C
I
a
I
b
I
c
RPM sensing
H
A
H
B
H
C
Hall Motor Driver
Three Phase Hall Motor
Anachip Corp.
www.anachip.com.tw
2/6
Rev 0.7 May 7, 2004
AH174
Inverted Output Hall Effect Latch For High Temperature
Absolute Maximum Ratings
Characteristics
( at Ta= 25
°
C )
Symbol
Rating
Unit
Supply voltage
Output “off ” voltage
Output “on” current
Operating Temperature range
Storage Temperature range
Power Dissipation
SIP
SOT23
VCC
20
20
25
-40~+125
-65~+150
550
230
V
V
mA
°
C
°
C
V
out (off)
I
o (sink)
T
opt
T
stg
PD
mW
mW
Electrical Characteristics
Parameter
Symbol
( Ta= 25
°
C )
Conditions
Min.
Typ.
Max.
Unit
Supply voltage
Output saturation voltage
Supply current
Vcc
Vout(sat)
Icc
Io =10mA
—
VCC=12V,
OUT ”ON”
VCC=12V,
OUT
”OFF”
3.5
-
-
-
300
3.5
20
400
6
V
mV
mA
Magnetic Characteristics
(Ta= 25
°
C )
(1mT = 10 Gauss)
A grade
Parameter
Symbol
Min.
Typ.
Max.
Unit
Operate Point
Release Point
Hysteresis
B grade
Parameter
Bop
Brp
Bhy
15
-60
-
-
-
80
60
-15
-
Gauss
Gauss
Gauss
Symbol
Min.
Typ.
Max.
Unit
Operate Point
Release Point
Hysteresis
Bop
Brp
Bhy
5
-80
-
-
-
80
80
-5
-
Gauss
Gauss
Gauss
Anachip Corp.
www.anachip.com.tw
3/6
Rev 0.7 May 7, 2004
AH174
Inverted Output Hall Effect Latch For High Temperature
Operating Characteristics
OUT
S
S
Marking side
( Output Voltage )
V
cc
B
hy
Marking side
N
( SOT23 )
N
( SIP3 )
V
sat
B
rp
0
B
op
( Magnetic flux density )
Marking Information
(1) SOT23
(Top View)
ID code
A~Z: Non-Lead Free
a~z : Lead Free
J4 : AH174
Date code
Y : Year
M : Month (A~L)
(2) SIP3
(Top View)
174
YWW X
ID code
A~Z: Non-Lead Free
a~z : Lead Free
Date code
Y : Year
WW : Nth week
XX YM X
Anachip Corp.
www.anachip.com.tw
4/6
Rev 0.7 May 7, 2004
AH174
Inverted Output Hall Effect Latch For High Temperature
