Diodes AH1888 - Manual

AH1888
MICROPOWER, GENERAL-SENSITIVE HALL EFFECT
SWITCH
AH1888
Document number: DS31565 Rev. 8 - 2
1 of 11
www.diodes.com
February 2012
© Diodes Incorporated
Description
The AH1888 micro power Omni-polar Hall Effect switch IC
designed for portable and battery powered equipment such
as cellular phones, PDA’ s and portable PC’ s. Based on
two sensitive Hall Effect plates and chopper stabilized
architecture the AH1888 provides a reliable solution over the
whole operating range. To support portable and battery
powered equipment the design has been optimized to
operate over the supply range of 1.65V to 3.3V and
consumes only 12.6µW with a supply of 1.8V.
The outputs 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 is switched on. The
output is turned off when B becomes lower than the release
point (Brp). The output will remain off when there is no
magnetic field. The AH1888-ZG has two outputs, output one
pulls low when switched on and output two is inverted. The
AH1888-FJG provides output one and AH1888-FJRG
provides output two.
Features
•
Omni-polar (north or south pole) operation
•
Single or dual output options
•
Internal output pull up capability
• Micropower
operation
•
1.65V to 3.3V operating range
•
Chopper stabilized design provides
•
Superior temperature stability
•
Minimal switch point drift
•
Enhanced immunity to stress
•
Good RF noise immunity
•
-40°C to 85°C operating temperature
• ESD
(HBM)＞4KV for SOT553
• ESD
(HBM)＞5KV for U-DFN2020-3 and U-DFN2020R-3
•
Package: SOT553, U-DFN2020-3 and U-DFN2020R-3
•
Halogen and Antimony free “Green” device
Pin Assignments
5
4 3
2
1
GND
Output1
NC
Output 2
Vdd
( Top View )
SOT553
U-DFN2020-3
(Top View)
3. GND
2. Output 1 1. Vdd
U-DFN2020R-3
(Top View)
3. GND
2. Output 2 1. Vdd
Applications
• Cellular
phone
•
Portable PC and PDAs
• Camcorders
• Cordless
phone
•
Contactless switch in consumer products