AS5403D-HTST datasheet(4/66 Pages) AMSCO

4 / 66 page

Page 4

ams Datasheet

Document Feedback

[v1-06] 2015-Aug-28

AS5403A/D/E − General Description

Block Diagram

The functional blocks of this device for reference are

shown below:

Figure 4:

AS5403A/D/E Block Diagram

3D Hall pixels:

The AS5403 contains two 3D Hall pixels, spaced 2.5mm apart.

MUX:

The multiplexer pre-selects depending on the AS5403 variant and chosen mode

two/four magnetic components.

ADC:

The Sigma-Delta ADC samples the Hall sensors signals selected by the MUX. The

sampling of the sensors is done sequentially.

Signal conditioning:

This block includes offset and temperature compensation as well as amplitude

matching.

Bi/Bj:

Preparation of the input signal for the ATAN calculation. Inversion and offset

adjustment functions.

ATAN:

Angle calculation.

Linearization:

A 33-point linearization of the ATAN output. In addition output settings for gain an

clamping.

Temperature:

An on-chip temperature sensor is available. It can be read over the SPI interface. This

sensor is also used for signal conditioning

PWM interface:

The linearized measurement data is available over a single pin in the form of a pulse

width modulated (PWM) signal.

SPI interface:

A bi-directional SPI interface allows communication with the chip, including reading

measurement data, E²PROM contents or writing configuration data.

E²PROM:

The on-chip E²PROM contains the configuration data of the chip.

Diagnostics:

Monitor functions on different blocks to check the correctness of the internal signals.

VDD3V

LDO

AS5403

VDD

GND

SCS

SDI

SCLK

SDO

3DHall

Cell

3DHall

Cell

E²PROM

Diagnostics

PWM

DAC

ADC

signal

conditioning

ATAN

(CORDIC)

Linearization

and

Output setting

Temperature

Sensor

SPI

OUT

DSW

AS5403D-HTST Datasheet(PDF) 4 Page - ams AG

AS5403D-HTST Datasheet(HTML) 4 Page - ams AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66

Datasheet Download

Link URL