Diodes AH175 User Manual
Ah175, Hall effect latch for high temperature, Description
AH175
HALL EFFECT LATCH FOR HIGH TEMPERATURE
AH175
Document number: DS31043 Rev. 10 - 2
1 of 9
July 2010
© Diodes Incorporated
Description
AH175 is a single-digital-output Hall-Effect latch 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, an open-collector output pre-
driver. 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 AH175 is available in SIP-3L and SC59 packages.
Features
• Bipolar Hall-Effect latch sensor
• 3.5V to 20V DC operating voltage
• Open
collector
pre-driver
• 25mA output sink current
• Built-in power reverse protection
• Operating
Temperature: -40ºC~+150ºC
• SIP-3L and SC59 packages
(SC59 is commonly known as SOT23 in Asia)
• Green Molding Compound (No Br, Sb) (Note 1)
Pin Assignments
(Top View)
1. Vcc
2. GND
3. OUT
SIP-3L
1. Vcc
GND 2.
3. OUT
(Top View)
SC59
Applications
• Rotor Position Sensing
• Current
Switch
• Encoder
• RPM
Detection
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
Typical Application Circuit
M
Driver
&
Control Logic
I
a
I
b
I
c
I
A
I
C
I
B
H
B
H
A
H
C
M: Three Phase Hall Motor
Digital Hall Effect Sensor
Hall Motor Driver
RPM sensing
3 Phase Hall Motor