AH1892

Micropower Selectable threshold Omnipolar Hall Effect Switch

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Description

The AH1892 is a micropower magnetic range selectable (Bop/Brp) Omnipolar Hall effect switch IC with internal pull up and pull down capability, designed for consumer equipment ranging from portable and battery powered cellular phones and portable PCs to home appliances and industrial applications. To support battery powered equipment and low voltage microcontrollers, the AH1892 can operate over the supply range of 1.6V to 3.6V and uses a hibernating clocking system to minimize the power consumption. The average supply current is only 4.3?A typical at 1.8V. Based on chopper stabilized architecture and ESD of 8kV on supply and output pins, the AH1892 provides reliable and robust solutions over the whole operating range. To minimize PCB space the AH1892 is packaged in the small and low profile U-WLB0707-4 (CSP 0.71mm x 0.71mm typical) or SOT553 leaded package The output is activated with either a north or south pole of sufficient magnetic field strength. The user can select one of two magnetic sensitivity bands via the BSEL pin without the addition of any external components allowing a flexible but small solution. The band select can be hardwired or be changed on the fly via a logic source such as a micro-controller. When the magnetic flux density (B) is larger than operate point (Bop), the output will be turned on (pul°C low) and held until B is lower than release point (Brp).

Application(s)

• Open and close detect for cellular phones

Holster detect for cellular phones and Smart phones

Cover switch in portable PCs - Tablets and Notebooks

Camcorders and still cameras

Contact-less switch in consumer battery power products

Proximity, position, level and dial switch position detection

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP)	Standard
AEC Qualified	No
Type	Omnipolar
Outputs	Single
Output Type	Push-Pull
Active Output State (B > Bop)	Low
Inactive Output State (B < Brp)	High
Key Feature	Selectable Sensitivity
Operating Voltage (V)	1.6 to 3.6
Average Supply Current (mA)	0.0043
Min Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss)	43
Typ Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss)	60
Max Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss)	80
Min Release Point Brp (Brps +ve/ Brpn -ve) (Gauss)	35
Typ Release Point Brp (Brps +ve/ Brpn -ve) (Gauss)	50
Max Release Point Brp (Brps +ve/ Brpn -ve) (Gauss)	70
Operating Ambient Temperature (°C)	-40 to 85

Technical Documents

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

RoHSFile

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-2611	2023-04-03	2023-07-03	Qualified Additional Assembly Test Sites, Die Revision and Tape and Reel Packing Quantity.
PCN-2507	2021-02-03	2021-05-03	Qualification of Additional Wafer Backside Material Supplier