A1203EUA-T Allegro, A1203EUA-T Datasheet

A1203EUA-T

Manufacturer Part Number

A1203EUA-T

Description

Manufacturer

Allegro

Datasheets

1.A1203EUA-T.pdf (13 pages)

2.A1203EUA-T.pdf (13 pages)

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Features and Benefits

▪ Continuous-time operation

▪ Stable operation over full operating temperature range

▪ Reverse battery protection

▪ Solid-state reliability

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

▪ Robust EMC performance

▪ High ESD rating

▪ Regulator stability without a bypass capacitor

Packages: 3 pin SOT23W (suffix LH), and

3 pin SIP (suffix UA)

Not to scale

A1201-DS, Rev. 5

performance

▫ Fast power-on time

▫ Low noise

VCC

Continuous-Time Bipolar Switch Family

Regulator

Functional Block Diagram

Gain

Amp

To all subcircuits

Control

A1201, A1202, A1203, and A1204

Trim

Description

The Allegro

bipolar switches are next-generation replacements and

extension of the popular Allegro A3134, A3133, and A3132

bipolar switch product line. Overall, the A120x family, produced

with BiCMOS technology, consists of continuous-time 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 A120x Hall-effect bipolar 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 motor commutation

Continued on the next page…

Offset

A1201, A1202, A1203, and A1204 Hall-effect

GND

VOUT

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