Alegro

A1301 and A1302
Continuous-Time Ratiometric Linear Hall Effect Sensor ICs
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

Description
The A1301 and A1302 are continuous-time, ratiometric, linear Hall-effectsensor 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, alinear 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 idealfor 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 platedleadframes.

Packages: 3 pin SOT23W (suffix LH), and 3 pin SIP (suffix UA)

Not to scale

Functional Block Diagram
V+

VCC

To all subcircuits

Filter

Amp

Out

VOUT

Gain CBYPASS

Offset

Trim Control

GND

A1301-DS, Rev. 17

A1301 and A1302

Continuous-Time Ratiometric Linear Hall Effect Sensor ICs

Selection Guide
Part Number A1301EUA-T A1301KLHLT-TA1301KUA-T A1302ELHLT-T A1302KLHLT-T A1302KUA-T Packing* Bulk, 500 pieces/bag 7-in. tape and reel, 3000 pieces/reel Bulk, 500 pieces/bag 7-in. tape and reel, 3000 pieces/reel 7-in. tape and reel, 3000 pieces/reel Bulk, 500 pieces/bag Package SIP Surface Mount SIP Surface Mount Surface Mount SIP Ambient, TA –40ºC to 85ºC –40ºC to 125ºC –40ºC to 85ºC –40ºC to 125ºC 1.3 mV/G 2.5 mV/G Sensitivity (Typical)*Contact Allegro for additional packing options.

Absolute Maximum Ratings
Characteristic Supply Voltage Output Voltage Reverse Supply Voltage Reverse Output Voltage Output Sink Current Operating Ambient Temperature Maximum Junction Temperature Storage Temperature Symbol VCC VOUT VRCC VROUT IOUT TA TJ(max) Tstg Range E Range K Notes Rating 8 8 –0.1 –0.1 10 –40 to 85 –40 to 125 165 –65 to 170Units V V V V mA ºC ºC ºC ºC

Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

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A1301 and A1302

Continuous-Time Ratiometric Linear Hall Effect Sensor ICs

Pin-out Drawings

Package LH
3

Package UA

1

2

1

2

3

Terminal List Symbol VCC VOUT GND Number Package LH Package UA 1 1 2 3 3 2Description Connects power supply to chip Output from circuit Ground

Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

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A1301 and A1302

Continuous-Time Ratiometric Linear Hall Effect Sensor ICs

DEVICE CHARACTERISTICS over operating temperature range, TA, and VCC = 5 V, unless otherwise notedCharacteristic Symbol Test Conditions Min. Electrical Characteristics Running, TJ < 165°C 4.5 Supply Voltage VCC Supply Current ICC Output open – VOUT(High) ISOURCE = –1 mA, Sens = nominal 4.65 Output Voltage – VOUT(Low) ISINK = 1 mA, Sens = nominal Output Bandwidth BW – VCC(min) to 0.95 VOUT; B = ±1400 G; Power-On Time tPO – Slew rate = 4.5 V/μs to 4.5 V/100 ns Output Resistance ROUT ISINK ≤ 1 mA, ISOURCE...