Description

TheA1301 andA1302 are continuous-time, ratiometric, linear

Hall-effect sensor ICs.They are optimized to accurately provide

a voltage output that is proportional to an applied magnetic

field. These devices have a quiescent output voltage that is

50% of the supply voltage. Two output sensitivity options

are provided: 2.5 mV/G typical for the A1301, and 1.3 mV/G

typical for the A1302.

The Hall-effect integrated circuit included in each device

includes a Hall circuit, a linear amplifier, and a CMOS Class A

output structure. Integrating the Hall circuit and the amplifier

on a single chip minimizes many of the problems normally

associated with low voltage level analog signals.

High precision in output levels is obtained by internal gain

and offset trim adjustments made at end-of-line during the

manufacturing process.

These features make the A1301 and A1302 ideal for use in

position sensing systems, for both linear target motion and

rotational target motion. They are well-suited for industrial

applications over extended temperature ranges, from –40°C

to 125°C.

Two device package types are available: LH, a 3-pin SOT23W

type for surface mount, and UA, a 3-pin ultramini SIP for

through-hole mount. They are lead (Pb) free (suffix, –T) with

100% matte tin plated leadframes.

A1301-DS, Rev. 17

Features and Benefits

▪ Low-noise output

▪ Fast power-on time

▪ Ratiometric rail-to-rail output

▪ 4.5 to 6.0 V operation

▪ Solid-state reliability

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

performance

▪ Robust ESD performance

Continuous-Time Ratiometric Linear Hall Effect Sensor ICs

Functional Block Diagram

Not to scale

Packages: 3 pin SOT23W (suffix LH), and

3 pin SIP (suffix UA)

A1301 and A1302

Amp

GND

VOUT

VC

To all subcircuits

C

Out

Offset

Trim

Control

Gain

V+

CBYPASS