NOT RECOMMENDED FOR NEW DESIGN
USE
AH3782
AH173
INTERNAL PULL-UP HALL EFFECT LATCH
FOR HIGH TEMPERATURE
Description
AH173 is a single-digital-output Hall-Effect latch sensor with pull-up
resistor for high temperature operation. The device includes an on-
chip Hall voltage generator for magnetic sensing, an amplifier to
amplify Hall voltage, a comparator to provide switching hysteresis for
noise rejection, and an output driver with a pull-up resistor (Rpu). An
internal band-gap regulator provides a temperature compensated
supply voltage for internal circuits and allows a wide operating supply
range.
When the magnetic flux density (B) is larger than operate point (Bop),
output is switched on (OUT pin is pulled low). The output state is held
on until a magnetic flux density reversal falls below Brp. When
B
is
less than Brp, the output is switched off.
The AH173 is available in SIP-3 and SC59 packages.
Pin Assignments
(Top View)
3. OUT
2. GND
1. Vcc
SIP-3
(Top View)
3. OUT
GND 2.
1. Vcc
Features
•
•
•
•
•
•
•
•
Bipolar Hall-Effect Latch Sensor
3V to 20V DC Operating Voltage
Built-in Pull-up Resistor
25mA Output Sink Current
Operating Temperature: -40C to +125C
SIP-3 and SC59 Packages
(SC59 is Commonly Known as SOT23 in Asia)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
SC59
Applications
•
•
•
•
Rotor Position Sensing
Current Switch
Encoder
RPM Detection
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit
I
A
I
B
M
Digital Hall Effect Sensor
Driver
&
Control Logic
I
C
I
a
I
b
I
c
RPM sensing
M: Three Phase Hall Motor
H
A
H
B
H
C
Hall Motor Driver
3 Phase Hall Motor
AH173
Document number: DS31044 Rev. 11 - 3
1 of 9
www.diodes.com
December 2017
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE
AH3782
AH173
Pin Descriptions
Pin Name
Vcc
GND
OUT
Pin #
1
2
3
Ground
Output Stage
Description
Positive Power Supply
Functional Block Diagram
V
CC
1
REG.
R
pu
3
AMP
OUT
2
GND
Absolute Maximum Ratings
(T
A
= +25C)
Symbol
V
CC
V
OUT
(Off)
I
O
(Sink)
T
S
T
J
P
D
Characteristics
Supply Voltage
Output “Off” Voltage
Output “On” Current
Storage Temperature Range
Maximum Junction Temperature
Power Dissipation
SIP-3
SC59
Values
20
20
25
-65 to +150
+150
550
230
Unit
V
V
mA
C
C
mW
mW
Recommended Operating Conditions
Symbol
V
CC
T
A
Characteristic
Supply Voltage
Operating Ambient Temperature
Conditions
Operating
Operating
Min
3
-40
Max
20
+125
Unit
V
C
AH173
Document number: DS31044 Rev. 11 - 3
2 of 9
www.diodes.com
December 2017
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE
AH3782
AH173
Electrical Characteristics
Symbol
V
OUT (SAT)
I
CC
Rpu
V
d
(T
A
= +25C)
Characteristics
Output Saturation Voltage
Supply Current
Internal Pull-up Resistor
Dropout Voltage
Conditions
V
CC
= 12V, OUT ”ON”
I
O
= 10mA
V
CC
= 12V, OUT ”OFF”
-
V
d
= V
CC
- V
CE
Min
-
-
7
-
Typ
300
3.5
10
-
Max
400
6
13
0.3
Unit
mV
mA
KΩ
V
Magnetic Characteristics
(T
A
= +25C, V
CC
= 12V, unless otherwise specified, Note 4)
(1mT = 10 Gauss)
A Grade
Symbol
Bops (South Pole to Brand Side)
Brps (South Pole to Brand Side)
Bhy(|Bopx|-|Brpx|)
B Grade
Symbol
Bops (South Pole to Brand Side)
Brps (South Pole to Brand Side)
Bhy (|Bopx|-|Brpx|)
Notes:
Parameter
Operation Point
Release Point
Hysteresis
Min
15
-60
-
Typ
-
-
80
Max
60
-15
-
Unit
Gauss
Gauss
Gauss
Parameter
Operation Point
Release Point
Hysteresis
Min
5
-80
-
Typ
-
-
80
Max
80
-5
-
Unit
Gauss
Gauss
Gauss
4. Magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
Operating Characteristics
V
OUT
(Output Voltage)
V
CC
High
S
S
Marking Side
V
d
B
hy
Low
Marking Side
N
(SC59)
N
(SIP-3)
V
SAT
B
rp
0
B
op
( Magnetic Flux Density)
AH173
Document number: DS31044 Rev. 11 - 3
3 of 9
www.diodes.com
December 2017
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE
AH3782
AH173
Ordering Information
AH173 - X X - X - X
Package
P : SIP-3
W : SC59
Green
G : Green
Packing
A : Ammo Box (Note 6)
B : Bulk (Note 7)
7 : Tape & Reel
Bulk
Magnetic
Characteristics
A or B
7” Tape and Reel
Quantity
NA
NA
NA
NA
3000/Tape & Reel
3000/Tape & Reel
Part Number
Suffix
NA
NA
NA
NA
-7
-7
Part Number
AH173-PG-A-A
AH173-PG-A-B
AH173-PG-B-A
AH173-PG-B-B
AH173-WG-7-A
AH173-WG-7-B
Notes:
Status
(Note 8)
NRND
NRND
NRND
NRND
NRND
NRND
Package
Code
P
P
P
P
W
W
Packaging
(Note 5)
SIP-3
SIP-3
SIP-3
SIP-3
SC59
SC59
Quantity
NA
NA
1000
1000
NA
NA
Part
Number
Suffix
NA
NA
-B
-B
NA
NA
Ammo Box
Part
Quantity Number
Suffix
4000/Box
4000/Box
NA
NA
NA
NA
-A
-A
NA
NA
NA
NA
5. Pad layout as shown on Diodes Incorporated’s suggested pad layout document, which can be found on our website at
http://www.diodes.com/package-outlines.html.
6. Ammo Box is for SIP-3 Spread Lead.
7. Bulk is for SIP-3 Straight Lead.
8: NRND = Not Recommended for New Design
AH173
Document number: DS31044 Rev. 11 - 3
5 of 9
www.diodes.com
December 2017
© Diodes Incorporated
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