A1373 and A1374

A1373-DS, Rev. 3

Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

ABSOLUTE MAXIMUM RATINGS

Output Current

Operating Temperature

High Precision, Output Pin Programmable

Linear Hall Effect Sensors

Features and Benefits

Package KB, 3-pin SIP

The A1373 and A1374 high precision linear Hall effect sensors are sensitive, tem-

perature stable, linear devices with externally programmable features. This device

family incorporates a chopper-stabilized amplifier, voltage regulator, program-

ming logic, and an output amplifier on a single IC. The patented dynamic offset

cancellation used with a chopper-stabilization technique provides extremely low

offset and minimal temperature drift. A high frequency clock is used for chopping,

to ensure high frequency signal processing capability. The A1373 and A1374 are

ideal for use in automotive and industrial linear position-sensing applications that

require increased reliability and accuracy over conventional contacting-potentiom-

eter solutions. Key applications include: throttle position sensors, pedal position

sensors, and suspension height sensors.

The design and manufacturing flexibility of the A1373 and A1374 complement

the Allegro linear Hall effect family of devices by offering programmable gain,

quiescent offset voltage for unipolar or bipolar operation, temperature coef-

ficient, clamps, and polarity. The device can be set up in a magnetic circuit

and programmed with a train of serial pulses via the output pin. Once the right

combination of gain, quiescent output voltage, and temperature coefficient has

been selected, the codes can be locked for one-time programming. In this manner,

manufacturing tolerances can be reduced and the assembly process can be simpli-

fied.

These devices are available in the KB package, a 3-pin SIP (single inline pack-

age). The lead (Pb) free version has a 100% matte tin plated leadframe.

voltage of 28 V may be applied to VOUT.

Output pin programming

Field-programmable for optimal application integration

Selectable coarse and fine gain and quiescent output voltage

Selectable sensitivity temperature coefficient

Selectable output clamp voltage level, including no-clamp (rail-to-rail)

Selectable output polarity

Unipolar or bipolar operation

Ratiometric sensitivity, clamps, and quiescent output voltage

Chopper-stabilized Hall technique

Wide operating temperature range

On-chip regulator for over/under voltage protection

On-chip regulator provides EMI robustness

Wide lead-spacing with KB package

1

2

3

1. VCC

2. GND

3. VOUT (Programming)