The A1454 linear Hall-effect sensor IC provides a 12-bit digital output word that is proportional to the strength of the magnetic field that is present. Its quiescent output value is at mid-scale, and it comes in 2 different factory programmed sensitivity ranges: 2LSB/G & 4LSB/G. The sensitivity temperature coefficient is also factory programmed to support either neodymium or ferrite magnets. The A1454 incorporates an I²C interface for easy integration into a wide variety of applications. The I²C address can either be set by external resistors or programmed via EEPROM, to support up to 127 unique I²C addresses, allowing for multiple ICs on the same bus. It also includes 16 bytes of user programmable EEPROM.
The A1454 I2C interface provides a user-controlled sleep input command that puts the device in micro-power mode, which reduces the current consumption of the A1454. This low power feature makes the A1454 perfect for portable, battery-operated applications.
The BiCMOS monolithic process allows the integration of both high precision analog and high-density digital circuitry. The A1454 integrates the Hall element, a 12-bit ADC, gain and offset compensation circuitry, EEPROM memory and the I²C interface on a single monolithic IC that is packaged in a space saving surface mount package.