A3054KU 데이터시트 PDF

A3054KU 기능

MULTIPLEXED TWO-WIRE HALL-EFFECT SENSOR ICs

Allegro MicroSystems

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3054 MULTIPLEXED TWO-WIRE HALL-EFFECT SENSOR ICs 3054 MULTIPLEXED TWO-WIRE HALL-EFFECT SENSOR ICs The A3054KU and A3054SU Hall-effect sensors are digital magnetic sensing ICs capable of communicating over a two-wire power/ signal bus. Using a sequential addressing scheme, the device responds to a signal on the bus and returns the diagnostic status of the IC, as well as the status of each monitored external magnetic field. As many as 30 sensors can function on the same two-wire bus. This IC is ideal for multiple sensor applications where minimizing the wiring harness size is desirable or essential. Each device consists of high-resolution bipolar Hall-e

Contents of page 4 out of 12 pages :

3054 MULTIPLEXED TWO-WIRE HALL-EFFECT SENSOR ICs ADDRESSING PROTOCOL Magnetic Operate Point (BOP) Minimum magnetic field required to switch ON the Hall amplifier and switching circuitry of the addressed sensor. This circuitry is only active when the sensor is addressed. Magnetic Release Point (BRP) Magnetic field required to switch OFF the Hall amplifier and switching circuitry after the output has been switched ON. When a device is deactivated by changing the bus address, all magnetic memory is lost. A device may be addressed by changing the supply voltage as shown in Figure 1. A preferred addressing protocol is as follows: the bus supply voltage is brought low (<2.5 V) so that all devices on the bus are reset. The voltage is then raised to the address LOW voltage (VL) and the bus quiescent current is measured. The bus is then toggled between VL and VH (address HIGH voltage), with each positive transition representing an increment in the bus address. After each voltage transition, the bus current may be monitored to check for diagnostic and signal responses from sensor ICs. Magnetic Hysteresis (BHYS) Difference between the BOP and BRP magnetic field thresholds. Sensor Addressing When a sensor detects a bus address equal to its factory-programmed address, it responds with an increase in its supply current drain ( IS) during the next HIGH portion BUS VOLTAGE V H VCLH V CHL VL V RST 0 SENSOR 02 CURRENT WITH NO MAGNETIC FIELD IS I QL I QH 0 SENSOR 03 CURRENT WITH MAGNETIC FIELD IS I QL I QH 0 IS TOTAL BUS CURRENT WITH MAGNETIC FIELD AT SENSOR 03 n

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관련 데이터시트

부품번호	상세설명 및 기능	제조사
A3054KU	MULTIPLEXED TWO-WIRE HALL-EFFECT SENSOR ICs	Allegro MicroSystems

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