Diodes Incorporated AH1899 Micropower Omnipolar Hall-Effect Switches

Diodes Incorporated AH1899 Micropower Omnipolar Hall-Effect Switches are low-power ICs with high sensitivity designed for portable devices like cell phones and laptops. The Diodes Incorporated AH1899A and AH1899B have a low average supply current of 0.95µA at 1.2V and 1.1µA at 1.8V. The AH1899S has an average supply current of only 5.1µA at 1.2V and 5.8µA at 1.8V. The devices operate in the range of 1.1V to 2.0V and utilize a hibernating clocking system to reduce power consumption. The compact X2-DFN1010-4 (Type B) package minimizes PCB space.

Features

Omnipolar operation (north or south pole)
Supply voltage of 1.1V to 2.0V
Micropower operation
Chopper stabilized design provides
- Superior temperature stability
- Minimal switch point drift
- Enhanced immunity to physical stress

No external pull-up resistors are required
Good RF noise immunity
-40°C to +85°C operating temperature
Small low-profile X2-DFN1010-4 (Type B) package
Totally lead-free and fully RoHS-compliant
Halogen and antimony-free, green device

Applications

Cover or display switches in portable PCs
Open and close detection for cellular phones
Holster or cover detection for cellular phones and tablet PCs

Digital stills, video cameras, and handheld gaming consoles
Contactless switches

Diodes Incorporated AH1899 Micropower Omnipolar Hall-Effect Switches

Features

Applications

Block Diagram

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