A1101(2006) Просмотр технического описания (PDF) - Allegro MicroSystems

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A1101
(Rev.:2006)

Continuous-Time Switch Family

Allegro MicroSystems 

A1101, A1102, A1103, A1104, and A1106

Continuous-Time Switch Family

Features and Benefits

▪ Continuous-time operation

▫ Fast power-on time

▫ Low noise

▪ Stable operation over full operating temperature range

▪ Reverse battery protection

▪ Solid-state reliability

▪ Factory-programmed at end-of-line for optimum

performance

▪ Robust EMC performance

▪ High ESD rating

▪ Regulator stability without a bypass capacitor

Packages: 3 pin SOT23W (suffix LH), and

3 pin SIP (suffix UA)

Description

The Allegro® A1101-A1104 and A1106 Hall-effect switches

are next generation replacements for the popular Allegro

312x and 314x lines of unipolar switches. The A110x family,

produced with BiCMOS technology, consists of devices that

feature fast power-on time and low-noise operation. Device

programming is performed after packaging, to ensure increased

switchpoint accuracy by eliminating offsets that can be induced

by package stress. Unique Hall element geometries and low-

offset amplifiers help to minimize noise and to reduce the

residual offset voltage normally caused by device overmolding,

temperature excursions, and thermal stress.

The A1101-A1104 and A1106 Hall-effect switches include

the following on a single silicon chip: voltage regulator,

Hall-voltage generator, small-signal amplifier, Schmitt

trigger, and NMOS output transistor. The integrated voltage

regulator permits operation from 3.8 to 24 V. The extensive

on-board protection circuitry makes possible a ±30 V absolute

maximum voltage rating for superior protection in automotive

and industrial motor commutation applications, without adding

Not to scale

VCC

A1101-DS, Rev. 1

Continued on the next page…

Functional Block Diagram

Regulator

To all subcircuits

Amp

Gain

Offset

Trim

Control

VOUT

GND

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