Switches, Relays & Keypads


Programmable Hall switch

29 May 2013 Switches, Relays & Keypads

Diodes Incorporated has announced a programmable omnipolar Hall effect switch enabling designers to use the same contactless detection circuit in multiple applications or with different field strengths. The miniature AH1898 is suitable for numerous portable consumer applications including cellphones, tablets and cameras, as well as a variety of domestic, office and industrial equipment.

Able to detect both North and South magnetic fields, the IC features a band-select pin which allows device sensitivity to be changed to one of two predefined magnetic sensitivity ranges. It can also be used to change the band on the fly, using an external logic source or microcontroller. The high sensitivity of the Hall sensor also means that it can support weaker, lower-cost magnets and can be used at a greater distance from the magnet.

The Hall switch has been optimised for use over a 1,6 V to 3,6 V supply range and employs a hibernating clocking system to minimise power consumption. With an average supply current of just 4,3 μA at 1,8 V, it helps to extend portable battery cell lifetime.

To ensure high reliability in a broad range of applications, the AH1898 has been designed with an 8 kV ESD rating on supply and output pins. Circuit robustness is further raised by a chopper stabilised design, delivering enhanced temperature stability over the operating range from -40°C to 85°C, absolute minimum switch point drift, and enhanced immunity to RF noise and physical stress.

The device is available in the miniature 0,8 x 0,8 mm CSP package, making it 12 times smaller than common TSOT-packaged alternatives. At the same time, its simple 4-pin footprint and integration of pull-up resistors results in reduced external component counts and a simplification of PCB layouts.



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

MEMS-based environmental pressure sensors
25 March 2020, Avnet South Africa , Analogue, Mixed Signal, LSI
Bourns Sensors & Controls’ product line is introducing four new series of environmental sensors based on microelectromechanical systems (MEMS) technology. These four new series are designed for the customer ...

Read more...
Bluetooth 5.0 Low Energy module
25 March 2020, Avnet South Africa , Telecoms, Datacoms, Wireless, IoT
An output power of up to +8 dBm and the high sensitivity of the nRF52840, in combination with the LE coded PHY, make the module very attractive for applications that require a long range. The Bluetooth ...

Read more...
Complete design solution for energy efficient motor driving system
25 March 2020, Avnet South Africa , Power Electronics / Power Management
Electric motors are a powerhouse user of electricity worldwide, accounting for about two-thirds of industrial electricity consumption. The International Energy Agency reports that electric motors account ...

Read more...
Miniature automotive MOSFETs
25 March 2020, Avnet South Africa , Power Electronics / Power Management
Diodes Incorporated announced the introduction of the 40 V-rated DMTH4008LFDFWQ and 60 V-rated DMTH6016LFDFWQ automotive-compliant MOSFETs packaged in DFN2020. These miniature MOSFETs occupy just 10% ...

Read more...
New PIC MCU family
25 March 2020, Avnet South Africa , DSP, Micros & Memory
In microcontroller (MCU)-based system design, software is often the bottleneck for both time to market and system performance. By offloading many software tasks to hardware, Microchip Technology’s new ...

Read more...
Modern flanged enclosures for IIoT and sensor applications
25 March 2020, Avnet South Africa , Enclosures, Racks, Cabinets & Panel Products
OKW Gehäusesysteme has expanded its range of enclosures with the new EASYTEC. The special feature of this enclosure range is that there are fully integrated lugs on the short end faces of the bottom part. ...

Read more...
Hybrid capacitors combine the best of both worlds
26 February 2020, Avnet South Africa , Power Electronics / Power Management
The different properties of EDLCs, Li-ion batteries and Li-ion capacitors suits each technology to various different applications.

Read more...
Waveguide electromechanical relay switches
26 February 2020, RF Design , Switches, Relays & Keypads
Pasternack has just launched a new series of double ridge waveguide electromechanical relay switches which perform over broader frequency bands, making them ideal for applications involved with electronic ...

Read more...
Embedded IoT solutions for rapid prototyping
26 February 2020, Avnet South Africa , Telecoms, Datacoms, Wireless, IoT
Due to the fragmented nature of the Internet of Things (IoT) marketplace, increasing project complexity and costs, today’s developers face more challenges in design decisions than ever before. These challenges ...

Read more...
V2X: The future of vehicle communications
29 January 2020, Avnet South Africa , Editor's Choice, Telecoms, Datacoms, Wireless, IoT
A recent report by Juniper Research forecasts that more than 62 million vehicles will be capable of vehicle-to-vehicle communication by 2023; up from just over 1,1 million in 2019.

Read more...