AS5245HQFT datasheet(1/33 Pages) AMSCO

Il numero della parte	AS5245HQFT

Spiegazioni elettronici	Programmable 360쨘 Magnetic Angle Encoder with Absolute SSI and PWM Output

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Produttore elettronici	AMSCO [ams AG]

Homepage	http://www.ams.com

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AS5245

Programmable 360º Magnetic Angle Encoder with Absolute SSI and

PWM Output

www.austriamicrosystems.com/AS5245

Revision 1.3

1 - 33

Data Sheet

1 General Description

The AS5245 is a contactless magnetic angle encoder for accurate

measurement up to 360º and includes two AS5145 devices in a

punched stacked leadframe.

It is a system-on-chip, combining integrated Hall elements, analog

front end and digital signal processing in a single device.

To measure the angle, only a simple two-pole magnet, rotating over

the center of the chip is required. The magnet may be placed above

or below the IC.

The absolute angle measurement provides instant indication of the

magnet’s angular position with a resolution of 0.0879º = 4096

positions per revolution. This digital data is available as a serial bit

stream and as a PWM signal.

An internal voltage regulator allows operation of the AS5245 from

3.3V or 5.0V supplies.

The AS5245 is fully automotive qualified to AEC-Q100, grade 0.

2 Key Features

Contactless high resolution rotational position encoding over a

full turn of 360º

Two digital 12-bit absolute outputs

Quadrature A/B (10- or 12-bit) and Index output signal

User programmable zero position

Failure detection mode for magnet placement monitoring and

loss of power supply

“Red-Yellow-Green” indicators display placement of magnet in

Z-axis

Tolerant to magnet misalignment and air gap variations

Wide temperature range: - 40ºC to +150ºC

Unique Chip Identifier

Fully automotive qualified to AEC-Q100, grade 0

Small package: QFN 32 LD (7x7)

3 Applications

The AS5245 is ideal for applications with an angular travel range

from a few degrees up to a full turn of 360º. The device is suitable for

Automotive applications like Throttle position sensors, Gas/brake

pedal position sensing, Headlight position control, Contactless rotary

position sensing, Front panel rotary switches and Replacement of

potentiometer.

DSP

Hall Array

&

Frontend

Amplifier

Absolute

Interface

(SSI)

Incremental

Interface

Sin

Cos

Ang

Mag

MagINCn

MagDECn

DO

PWM

CLK

DTEST1_A

DTEST2_B

Mode_Index

PDIO

CSn

PWM

Interface

OTP

Register

VDD5V

VDD3V3

LDO 3.3V

Mux

AS5245

Note: This Block Diagram presents only one die

Figure 1. AS5245 Block Diagram

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