AH375
Single Phase Hall Effect Latch

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.1.3 Jan. 09, 2006
1/6
„ Features

- 2.2V to 20V DC operation voltage
- Temperature compensation
- Wide operating voltage range
- Open drain pre-driver
- 25mA maximum sinking output current
- Package: SIP3, SOT23


„ Applications

- Brush-less DC Motor
- Brush-less DC Fan
- Revolution counting
- Speed measurement


„ General Description

AH375 is an integrated Hall effect latched sensor
designed for electronic commutation of brush-less
DC motor applications. The device includes an
on-chip Hall voltage generator for magnetic sensing,
a comparator that amplifies the Hall voltage, and a
schmitt trigger to provide switching hysteresis for
noise rejection, and open drain output. An internal
bandgap regulator is used to provide temperature
compensated supply voltage for internal circuits
and allows a wide operating supply range.
If a magnetic flux density larger than threshold Bop,
DO is turned on(low). The output state is held until
a magnetic flux density reversal falls below Brp
causing DO to be turned off (high).

„ Pin Assignments

375
1
2 : GND
3 : OUT
23
375
1
2
3
1 : Vdd
(Top view)
(SIP package)
(SOT23 package)


„ Pin Descriptions


Name P/I/O Pin # Description
Vdd P 1 Positive Power Supply
GND P 2 Ground
OUT O 3 Output Pin


„ Ordering Information


AH375 X - X X X
Packing
Blank : Bulk
A : Tape & Reel
P: SIP3
W: SOT23
Package Lead
L : Lead Free
Wafer Body
Blank or
A~Z : if necessary
to specify