AS5047U-HTST datasheet(10/51 Pages) AMSCO

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ams Datasheet

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[v1-00] 2018-Oct-30

AS5047U − Detailed Description

The AS5047U is a Hall-effect magnetic sensor using a CMOS

technology. The Hall sensors convert the magnetic field

component perpendicular to the surface of the chip into

voltage.

The signals from the Hall sensors are amplified and filtered by

the analog front-end (AFE) before being converted by the

analog-to-digital converter (ADC). The output of the ADC is

processed by the hardwired CORDIC (coordinate rotation

digital computer) block to compute the angle and magnitude

of the magnetic vector. The intensity of the magnetic field

(magnitude) used by the automatic gain control (AGC) to adjust

the amplification level for compensation of the temperature

and magnetic field variations.

The AS5047U generates continuously the angle information,

which can be requested by the different interfaces of the device.

The internal 14-bit resolution is available by readout register

via the SPI interface. The resolution on the ABI output can be

programmed for 10 to 14 bits.

The Dynamic Angle Error Compensation block corrects the

calculated angle regarding latency by using a linear prediction

calculation algorithm. At constant rotation speed the latency

time is internally compensated by the AS5047U, reducing the

dynamic angle error at the SPI, ABI and UVW outputs.

The adaptive filter block is implemented after the

compensation block and reduces the transition noise at low

rotation speed. The stable information is available on SPI, ABI

and UVW.

AS5047U allows selecting between a UVW output interface and

a PWM encoded interface on the W pin.

The non-volatile settings in the AS5047U is programmed

through the SPI interface without any dedicated programmer.

The AS5047U can support high-speed application up to

28krpm.

Detailed Description

AS5047U-HTST Datasheet(PDF) 10 Page - ams AG