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A1454 Dataheets PDF



Part Number A1454
Manufacturers Allegro
Logo Allegro
Description 3V Hall Effect Linear Sensor
Datasheet A1454 DatasheetA1454 Datasheet (PDF)

A1454 3V Hall Effect Linear Sensor with I2C Output FEATURES AND BENEFITS • 1 mm thin (TSSOP-08) package • 2 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 m.

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A1454 3V Hall Effect Linear Sensor with I2C Output FEATURES AND BENEFITS • 1 mm thin (TSSOP-08) package • 2 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 • Wide ambient temperature range: –40°C to 125°C • 12-bit ADC with 10-bit ENOB (Effective Number of Bits) Package: 8-Pin TSSOP (suffix LE) Not to scale DESCRIPTION TheA1454 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. TheA1454 I2C interface provides a user-controlled sleep input command that puts the device in micro-power mode, which reduces the current consumption of theA1454. This low power feature makes theA1454 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 & offset compensation circuitry, EEPROM memory and the I2C interface on a single monolithic IC that is packaged in a space saving surface mount package. Engineering samples are available on a limited basis. Contact your sales or applications support office for additional information. VCC Sleep Mode I2C Serial SDA Interface SCL Hall Element ADC Digital Controller EEPROM Memory Charge Pump Slave Address ADC ADR0 ADR1 GND Functional Block Diagram I2C Master VCC VCC VCC 10 kΩ 10 kΩ VCC VA1 SCL VCC VCC 0.1 µF SDA ADR0 A1454 ADR1 GND VA0 NC NC Typical Application Circuit A1454-DS A1454 3V Hall Effect Linear Sensor with I2C Output Selection Guide Part Number Sensitivity A1454KLETR-2F-T 2 LSB/G A1454KLETR-4F-T 4 LSB/G A1454KLETR-2N-T 2 LSB/G A1454KLETR-4N-T 4 LSB/G *Contact Allegro™ for additional packing options. SPECIFICATIONS Target Magnet Ferrite Ferrite Neodymium Neodymium Packing Package 4000 pieces per reel 8-Pin TSSOP Package Absolute Maximum Ratings Characteristic Symbol Notes Rating U.


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