AH266
High Voltage 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. 0.1 Mar 25, 2004
1/6

null Features

- On-chip Hall plate
- Operating voltage: 4V~28V
- Output current: 400mA(Continuous, 25
o
C)
- Reverse protection diode only for chip reverse
power connecting
(Note)

- Output protection Zener breakdown Vz=62V(Typ)
- Package: SIP-4L
(Note)
Protection diode only exists at power pin(1,4) output, not
including pin (2,3).


null Application

- Dual-coil Brush-less DC Motor
- Dual-coil Brush-less DC Fan
- Revolution Counting
- Speed Measurement



null Pin Assignment


1. VCC
2. DO
4. GND
3. DOB


null General Description

AH266 is an integrated Hall sensor with output
drivers 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
complementary darlington open-collector drivers for
sinking large current loads. 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 (B) is larger than operate
point (Bop), DO turn on (low) and DOB turn off
(high). The outputs state is latched prior to reach
release point (Brp). if B< Brp, DO turn off and DOB
turn on. ATS266 is rated for operation over
temperature range from -20
o
C to 85
o
C and voltage
range from 4V to 28V. The devices are available in
low cost die forms or rugged 4 pin SIP packages.

null Pin Configuration


Name Description
VCC Positive Power Supply
DO Output Pin
DOB Output Pin
GND Ground

null Ordering Information


AH266 X -XX X -X
Packing
Blank : Tube
A : Taping
P: SIP-4L
Package Lead
L : Lead Free
Blank: Normal
Wafer Body
Magnetic
Characteristics
Blank or
A~Z : if necessary
to specify
A or B