A1454: 3 V Hall-Effect Linear Sensor with I²C Output

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.

• 1 mm thin (TSSOP-08) package
• Two factory programmed sensitivity options: 2 LSB/G (for fields up to ±1000 G) and 4 LSB/G (±500 G)
• Temperature-stable sensitivity for NdFeB and ferrite magnets
• I²C interface for easy integration with support for up to 127 unique addresses
• EEPROM stores factory programmed settings and up to 16 bytes of user information (programmable through the I²C interface)
• Micro-power sleep mode through I²C command for minimizing power in battery-operated applications
• Precise recoverability after temperature cycling
• 宽环境温度范围：-40°C至125°C
• 12-bit ADC with 10-bit ENOB (Effective Number of Bits)