Description

The H1812T800R-00 is a micropower Omnipolar Hall effect switch IC, designed for portable and battery-powered equipment such as portable PCs and mobile phones. This high sensitivity switch IC has an open-drain output and can operate over supply ranges of 1.6V to 3.6V. The AH1812 uses a hibernating clocking system that minimizes power consumption while providing excellent temperature stability and immunity to stress.

Specifications and features

• Omnipolar operation (North or South Pole)
• Supply voltage of 1.6V to 3.6V
• High sensitivity
• Micropower operation with average supply current of only 4.3µA at 1.85V
• Chopper-stabilized design provides superior temperature stability and extremely low switch-point drift
• Open drain output for system flexibility
• Good RF noise immunity
• Operating temperature range of -40°C to +85°C
• Small and low profile X1-DFN1216-4 package
• Totally lead-free and fully RoHS compliant
• Halogen and antimony-free "green" device

Application Scenarios

• Cover or display switch in portable PCs
• Open and close detect for cellular phones
• Holster detect for cellular phones and tablet PCs
• Digital still and video cameras
• Contactless switches

Comparison

• The AH1812 is designed for portable and battery-powered equipment
• Micropower operation with a low average supply current conserves battery life
• The chopper-stabilized design provides superior temperature stability and immunity to stress, and minimizes switch-point drift
• The Hall effect switch is an omnidirectional sensor that can be triggered by the presence of either a North or South pole

• The H1812T800R-00 is only suitable for use with devices operating within a supply voltage range of 1.6V to 3.6V
• This device may not be suitable for high-frequency applications due to its low RF noise immunity