AH1912
ULTRA-LOW POWER DIGITAL OMNIPLOAR
HALL-EFFECT SWITCH
Description
The AH1912 is an ultra-low power digital Omni-polar 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 AH1912 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.
Pin Assignments
(Top View)
GND 3
2 OUTPUT
1 VDD
SC59
The output is activated with either a north or south pole of sufficient
magnetic field 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 AH1912 comes with industry standard SC59 and X1-DFN1216-4
packages.
( Top View )
OUTPUT 1
4 VDD
GND 2
3 NC
X1-DFN1216-4
Features
Omni-Polar Operation (North or South Pole)
Supply Voltage of 1.6V to 5.5V
Micro Power Operation
Chopper Stabilized Design Provides:
Superior Temperature Stability
Minimal Switch Point Drift
Enhanced Immunity to Physical Stress
No External Pull-Up Resistors Required
Good RF Noise Immunity
-40°C to +85°C Operating Temperature
High ESD Capability of 6kV (Human Body Model)
Small Low Profile, SC59 and X1-DFN1216-4 Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
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
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ 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.
AH1912
Document number: DS41112 Rev. 3 - 2
1 of 10
www.diodes.com
July 2019
© Diodes Incorporated
