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AH1804 (Obsolete)

Micropower Omnipolar Hall Effect Switch

Datasheet

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Description

The AH1804 is a micropower Omnipolar Hall effect switch IC with a single output driver with internal pull up and pull down capability. Designed for portable and battery powered equipment such as cellular phones and portable PCs the average supply current is only 12µA at 3.3V. To support battery powered equipment the AH1804 has been optimized to operate over the supply range of 2.5V to 3.6V and uses a sleep function to minimise power consumption. To minimize PCB space the AH1804 is packaged in small low profile package. The outputs of the AH1804 are switched with either a North or South pole of sufficient strength. 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). The AH1804 is available in DFN1216-4 and SC59 packages.

Application(s)

• Cover switch in clam-shell and slide cellular phones • Cover switch in Netbook, Notebook, Tablets and PDAs • Camcorders

Contact-less switch in portable and battery powered applications

Specifications & Technical Documents

Product Parameters

# Outputs	1
ActiveHigh orLow	Low
Active Output State (B > Bop)	Low
AEC Qualified	No
Average Supply Current (µA)	12
Average Supply Current (mA)	0.012
Compliance (Only Automotive Supports PPAP)	Standard
Inactive Output State (B < Brp)	High
Max OperatingPoint ±Bop(Guass)	60
Max Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss)	60
Min OperatingPoint ±Bop (Guass)	20
Min Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss)	20
Min ReleasePoint ±Brp(Guass)	15
Min Release Point Brp (Brps +ve/ Brpn -ve) (Gauss)	15
Operating Ambient Temperature Range (°C)	-40 to 85
Operating Voltage (V)	2.5 to 3.6
Operating Voltage (V)	2.5 to 3.6
Output Type	Push-Pull
Outputs	Single
AEC Qualified	No
Sensitivity	High
Typ OperatingPoint ±Bop(Guass)	40
Typ Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss)	40
Typ ReleasePoint ±Brp(Guass)	32
Typ Release Point Brp (Brps +ve/ Brpn -ve) (Gauss)	32
Type	Omnipolar

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Purchase & Availability

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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-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products
PCN-2587	2022-05-13	2022-11-13	Device End of Life (EOL)
PCN-2512	2021-04-16	2021-07-16	Qualified Additional Assembly & Test (A/T) Site