AH373
INTERNAL PULL-UP HALL EFFECT LATCH
Description
Pin Assignments
AH373 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
(Top View)
3.
2.
OUT
GND
sensing, an amplifier to amplify Hall voltage, and
a
comparator to provide switching hysteresis for noise rejection,
and an output driver with a pull-up resistor. An internal band-
gap regulator provides a temperature compensated supply
voltage for internal circuits and allows a wide operating supply
range.
Vdd
1.
SIP-3L
(Top View)
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.
3. OUT
1. Vdd
GND 2.
SC59
The AH373 is available in SIP-3L and SC59 packages.
Applications
Features
•
•
•
•
Rotor Position Sensing
Current Switch
Encoder
•
•
•
•
•
•
Bipolar Hall-Effect latch sensor
2.2V to 20V DC operating voltage
Built-in pull-up resistor
25mA output sink current
Operating temperature: -40°C ~ +125°C
SIP-3L and SC59 packages
RPM Detection
(SC59 is commonly known as SOT23 in Asia)
Green Molding Compound (No Br, Sb) (Note 1)
•
Notes: 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.
Typical Application Circuit
IA
IB
Digital Hall Effect Sensor
M
IC
Driver
&
M: Three Phase Hall Motor
Ia
Ib
Ic
Control Logic
RPM sensing
HA
HB
HC
Hall Motor Driver
3 Phase Hall Motor
1 of 9
www.diodes.com
July 2010
© Diodes Incorporated
AH373
Document number: DS31173 Rev. 6 - 2