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AH1921

Micropower Omnipolar Hall Effect Switch

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Description

The AH1921 is an ultra-low power digital Omnipolar Hall Effect switch IC from Diodes broad Hall Effect switches family. Thanks to the hibernating clocking system, the average supply current is only 1.6μA at 3V, which makes the AH1921 perfectly fit battery-powered consumer products, Gas or water meter, smoke detectors and IoT devices. The wider range of supply voltage (1.6V to 5.5V) extends battery operating time and supports low voltage system microcontrollers, which provides great flexibility for system design. The advanced chopper stabilized design provides superior stability on switch operating point over temperature and supply voltage. The high ESD level up to 6kV helps to improve the system robustness.

The open drain output can be switched on with either South or North pole of sufficient strength. When the magnetic flux density (B) perpendicular to the package is larger than operate point (BOP), the output will be turned on (pulled low) and held until B is lower than release point (BRP).

The AH1921 comes with industry standard SC59 package.

Feature(s)

  • Omnipolar Operation (North or South Pole)
  • Supply Voltage of 1.6V to 5.5V 
  • Micropower Operation
  • Chopper Stabilized Design Provides:
  • Superior Temperature Stability
  • Minimal Switch Point Drift
  • Enhanced Immunity to Physical Stress
  • Open Drain output 
  • -40°C to +85°C Operating Temperature
  • High ESD Capability of 6kV (Human Body Model)
  • Small Low Profile, SC59 Package
  • Totally Lead-Free & Fully RoHS Compliant
  • Halogen and Antimony Free. “Green” Device

Application(s)

  • Smart Cover or Dock Detect for Cellular Phones and Tablet PCs
  • Gas or Water Consumption Measurement in Remote, Battery-Operated Utility Meters
  • Medical Devices, IoT Systems 
  • Level, Proximity and Position Switches
  • E-locks, Smoke Detectors, Appliances

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
AEC Qualified No
# Outputs 1
Output Type Open Drain
ActiveHigh orLow Low
Sensitivity Medium
Operating Voltage (V) 1.6 to 5.5 V
Average Supply Current (µA) 1.6 µA
Min OperatingPoint ±Bop (Guass) 30
Typ OperatingPoint ±Bop(Guass) 60
Max OperatingPoint ±Bop(Guass) 90
Min ReleasePoint ±Brp(Guass) 22
Typ ReleasePoint ±Brp(Guass) 45
Max ReleasePoint ±Brp(Guass) 67
Operating Ambient Temperature Range (°C) -40 to 85 °C

Related Content

Packages

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site