AH173

Internal Pull-up Hall Effect Latch For High Temperature

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. 0.7 May 7, 2004

1/6

Features

- Bipolar Hall effect latch sensor

- 3V to 20V DC operation voltage

- Built-in pull-up resistor

- 25mA output sink current

- Operating temperature:

C

125

~

C

40

°

+

°

−

- Package: SIP3, SOT23

Applications

- Rotor position sensing

- Current switch

- Encoder

- RPM detection

Pin Assignment

(SIP3 package)

( SOT23 package)

1. VCC

2. GND

3. OUT

1. VCC

3.

GND 2.

(Top view)

OUT

General Description

AH173 is a single-digital-output Hall-effect sensor

with pull-up resistor 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

output driver with a pull-up resistor (Rpu). An

internal bandgap 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 operate point (Bop), the OUT pin turns on

(low). If B moves toward release point (Brp), the

OUT pin is latched “on” state prior to B < Brp. When

B < Brp, the OUT pin go into “ off ” state.

Pin Descriptions

Name

Description

VCC

Positive power supply

GND

Ground

OUT

Output stage

Ordering Information

AH173 X -X X X -X

Packing

Blank : Tube or Bulk

A : Tape & Reel

P: SIP3

W: SOT23

Package

Lead

L : Lead Free

Blank: Normal

Wafer Body

Magnetic

Characteristics

Blank or

A~Z : if necessary

to specify

A or B