AH8501

Document number: DS37512 Rev. 1 - 2

1 of 19

www.diodes.com

February 2015

© Diodes Incorporated

AH8501

HIGH ACCURACY LOW POWER / MICROPOWER

LINEAR HALL EFFECT SENSOR

Description

The AH8501 is a high accuracy, low power/micropower linear Hall

effect sensor with an 8-bit output resolution. The output voltage is

ratiometric to the supply voltage and proportional to the magnetic flux

density, perpendicular to the part marking surface. The output null

voltage is at half the supply voltage.

AH8501 is a trimmed device with typical sensitivity of 2.25mV/G and

3.8mV/G at 1.8V and 3V respectively with an accuracy of 3% at 25°C.

The device has a typical input referred rms noise of 0.36G and 0.24G

at 1.8V and 3.0V.

Designed for battery powered consumer equipment to office

equipment, home appliances and industrial applications, the AH8501

can operate over the supply range of 1.6V to 3.6V and uses an

externally controlled ENABLE pin clocking system to control operating

modes and sampling rates to minimize the power consumption. The

typical average operating supply current is between 8.9µA during

sleep mode and 1.16mA at maximum sampling rate at 1.8V. With a

conversion pulse every 50ms at the ENABLE pin, the device achieves

a micropower operation with the power consumption of 22µW typical

at 1.8V supply.

To minimize PCB space the AH8501 are available in small, low profile

U-DFN2020-6.

Features

•

High Accuracy Linear Hall Effect Sensor with +/-400G Sense

Range and Output Voltage with 8-bit resolution

•

Supply Voltage of 1.6V to 3.6V

•

High Accuracy: Trimmed Sensitivity of 2.25mV/G and 3.8mV/G

at 1.8V and 3V Respectively with Accuracy of 3% at +25°C

•

Low Offset Voltage

•

Low Average Supply Current

8.9µA Typical in Sleep Mode (Default) at 1.8V

1.01mA Typical in Auto-Run Mode (6.25kHz) at 1.8V

12µA Typical in External Drive Mode with 20Hz Sample

Rate at 1.8V

1.16mA Typical in External Drive Mode with 7.14kHz

Sample Rate at 1.8V

Chopper Stabilized Design with Superior Temperature Stability,

Minimal Sensitivity Drift, Enhanced Immunity to Physical Stress

•

Output Voltage Maintained at ‘Sleep’ Mode

•

-40°C to +85°C Operating Temperature

•

High ESD Capability of 6kV Human Body Model

•

Small Low Profile U-DFN2020-6 Package

•

Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

•

Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

(Top View)

U-DFN2020-6

Applications

•

High Accuracy Level, Proximity, Position and Travel Detection

•

Button Press Detection in Digital Still, Video Cameras and

Handheld Gaming Consoles

•

Accurate Door, Lids and Tray Position Detection

•

Liquid Level Detection

•

Joy Stick Control – Gaming and Industrial Applications

•

Home Appliances and Industrial Applications

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.