AH8502

Description

The AH8502 is a 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.

The AH8502 has a typical sensitivity of 2.1mV/G and 3.55mV/G at 1.8V and 3V. The typical null voltage offset is less than 1% of VDD. The device has typical input referred rms noise of 0.36G and 0.24G at 1.8V and 3.0V.

Designed for battery-powered consumer equipment, office equipment, home appliances, and industrial applications, the AH8502 can operate over the supply range of 1.6V to 3.6V. The device has a CNTRL pin to select operating modes and sampling rate, minimizing power consumption. The device operates in default micropower mode with a sampling rate of 24Hz typical and consumes only 13µA typical at 1.8V. In turbo mode with continuous 6.25kHz sample rate, the current consumption is 1mA typical. In external-drive mode, the CNTRL can be used to change the sampling frequency up to 7.14KHz with a current consumption of 1.16mA typical at 1.8V.

To minimize PCB space, the AH8502 is available in the small and low-profile U-DFN2020-6 (Type C) package.

Feature(s)

• Linear Hall-Effect Sensor with +/-430G Sense Range and Output
• Voltage with 8-bit Resolution
• Supply Voltage of 1.6V to 3.6V
• Sensitivity: 2.1mV/G and 3.55mV/G at 1.8V and 3V at +25°C
• Low Offset Voltage
• Micropower (Default Mode), Turbo and External-Drive Modes
• Ultra-Low Average Supply Current
  • 13µA Typical in Micropower Mode (Default) Period at 1.8V
  • 01mA Typical in Turbo Mode at 1.8V
  • 16mA Typical in External Drive Mode with 7.14kHz Sampling 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 (Type C) Package
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• For automotive applications requiring specific change control (i.e.: parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please refer to the related automotive grade (Q-suffix) part. A listing can be found at https://www.diodes.com/products/automotive/automotiveproducts/.

Application(s)

• Level, proximity, position, and travel detection
• Button-press detection in digital stills, video cameras, and handheld gaming consoles
• Position detection in door, lids, and trays
• Liquid level detection
• Joy stick control in gaming and industrial applications
• Smart meters
• Contactless level, proximity, and position measurement in home appliances and industrial applications