AH1751
HALL EFFECT LATCH
Features
•
•
•
•
•
•
•
•
Bipolar Hall Effect Latch Sensor
3.5V to 20V DC Operation Voltage
Open Collector Pre-Driver
50mA Output Sink Current
Chip Power Reverse-Connection Protection
o
o
Operating Temperature: -40 C~125 C
SIP3, SC59 and SC59R (Commonly known as SOT23
in Asia): Available in “Green” Molding Compound
(No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
General Description
AH1751 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 band-gap 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 on (low). If B removed toward Brp, the OUT pin
is latched “on” state prior to B < Brp. When B < Brp, the OUT pin
go into “off ” state.
Applications
•
•
•
•
Rotor Position Sensing
Current Switch
Encoder
RPM Detection
Ordering Information
AH1751 - X G - X - A
Package
P : SIP3
W : SC59
R : SC59R
Green
G : Green
Packing
A : Ammo (Note 3)
B : Bulk (Note 4)
7 : Tape & Reel
7” Tape and Reel
Part
Quantity
Number
Suffix
NA
NA
NA
3000/Tape & Reel
3000/Tape & Reel
NA
-7
-7
Magnetic
Characteristics
A
Device
AH1751-PG-A-A
AH1751-PG-B-A
AH1751-WG-7-A
AH1751-RG-7-A
Notes:
Tube/Bulk
Package Packaging
Code
(Note 2) Quantity Part Number
Suffix
P
P
W
R
SIP3
SIP3
SC59
SC59R
NA
1000
NA
NA
NA
-B
NA
NA
Ammo Box
Magnetic
Part
Characteristics
Quantity Number
Suffix
4000/Box
-A
A
NA
NA
NA
NA
NA
NA
A
A
A
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
3. Ammo Box is for SIP3 Spread Lead.
4. Bulk is for SIP3 Straight Lead.
AH1751 Rev. 4
DS31436
1 of 9
www.diodes.com
OCTOBER 2009
©
Diodes Incorporated
AH1751
HALL EFFECT LATCH
Block Diagram
V
CC
1
REG.
3
AMP
OUT
2
GND
Absolute Maximum Ratings
Symbol
V
CC
V
out
(off)
I
o
(sink)
T
ST
T
J(MAX)
P
D
(T
A
= 25°C)
Parameter
Supply Voltage
Output “OFF ” Voltage
Output “ON” Current
Storage Temperature Range
Maximum Junction Temperature
Power Dissipation
SIP3
SC59 and SC59R
Rating
20
20
100
-65~+150
+150
550
230
Unit
V
V
mA
°C
°C
mW
mW
Recommended Operating Conditions
Symbol
V
CC
T
A
Notes:
Parameter
Supply Voltage
Operating Temperature Range
Conditions
Operating (Note 5)
Operating
Min
3.5
-40
Max
20
125
Unit
V
°C
5. Operating, the output is switching as magnetic field change (S>300G, N<-300G).
AH1751 Rev. 4
DS31436
3 of 9
www.diodes.com
OCTOBER 2009
©
Diodes Incorporated
AH1751
HALL EFFECT LATCH
Electrical Characteristics
Symbol
V
out
(
SAT
)
I
CC
Parameter
Output Saturation Voltage
Supply Current
(T
A
= 25°C)
Conditions
V
CC
= 12V, OUT ”ON”
I
o
= 50mA
V
CC
= 12V, OUT ”OFF”
Min
-
-
Typ.
200
3.5
Max
300
6
Unit
mV
mA
Magnetic Characteristics
A grade
Symbol
Bops(south pole to brand side)
Brps(south pole to brand side)
Bhy(
Bopx
−
Brpx
)
Notes:
(T
A
= 25°C, V
CC
= 4~20V, Note 6)
Parameter
Operation Point
Release Point
Hysteresis
Min
5
-70
-
Typ.
-
-
75
(1mT = 10 Gauss)
Max
Unit
70
Gauss
-5
Gauss
-
Gauss
6. Magnetic characteristics are for design information, which will vary with supply voltage, operating temperature and after soldering.
Operating Characteristics
V
out
(Output Voltage)
V
cc
Hig
h
S
S
Marking side
V
d
B
hy
Lo
w
Marking side
N
(SC59 and SC59R)
N
(SIP3)
V
SA
T
B
rp
0
B
op
( Magnetic Flux Density )
AH1751 Rev. 4
DS31436
4 of 9
www.diodes.com
OCTOBER 2009
©
Diodes Incorporated
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