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AH1921 Datasheet

ULTRA-LOW POWER DIGITAL OMNIPLOAR HALL-EFFECT SWITCH

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AH1911/AH1921
ULTRA-LOW POWER DIGITAL OMNIPLOAR
HALL-EFFECT SWITCH
Description
The AH1911/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 AH1911/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 single push-pull for AH1911 or open drain for AH1921 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).
Pin Assignments
(Top View)
GND 3
2 OUTPUT
1 VDD
SC59
The AH1911/AH1921 comes with industry standard SC59 package.
Features
Applications
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
AH1911 is Push-Pull Output and AH1921 is 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 (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
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.
Typical Applications Circuit (Note 4)
1.6V to 5.5V
VDD
1.6V to 5.5V
VDD
CIN
AH1911
OUTPUT
GND
RL
OUTPUT
CIN AH1921
GND
Note:
4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical and should be placed as close to
the VDD pin as possible.
AH1911/AH1921
Document number: DS41109 Rev. 1 - 2
1 of 9
www.diodes.com
September 2018
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AH1921 Datasheet

ULTRA-LOW POWER DIGITAL OMNIPLOAR HALL-EFFECT SWITCH

No Preview Available !

Pin Descriptions
Package: SC59
Pin Number
1
2
3
Pin Name
VDD
OUTPUT
GND
Power Supply Input
Output Pin
Ground Pin
AH1911/AH1921
Function
Functional Block Diagram
Hall
Plate
Amp
VDD
1
Sleep/Awake Logic
and Power Switch
Latch
and
Output
Driver
Controller
2 OUTPUT
AH1921
GND
3
VDD
OUTPUT
2 AH1911
GND
3
Absolute Maximum Ratings (Note 5) (@TA = +25°C, unless otherwise specified.)
Symbol
VDD
VDD_REV
IOUTPUT
B
PD
Ts
TJ
ESD HBM
Parameter
Supply Voltage (Note 6)
Reverse Supply Voltage
Output Current (Source and Sink)
Magnetic Flux Density
Package Power Dissipation
SC59
Storage Temperature Range
Maximum Junction Temperature
Human Body Model (HBM) ESD Capability
Rating
6
-0.3
1
Unlimited
230
-65 to +150
+150
6
Unit
V
V
mA
mW
°C
°C
kV
Notes:
5. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
6. The absolute maximum VDD of 6V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to
operate the device at the absolute maximum rated conditions for any period of time.
AH1911/AH1921
Document number: DS41109 Rev. 1 - 2
2 of 9
www.diodes.com
September 2018
© Diodes Incorporated


Part Number AH1921
Description ULTRA-LOW POWER DIGITAL OMNIPLOAR HALL-EFFECT SWITCH
Maker Diodes
Total Page 9 Pages
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