AS5147P-HTST datasheet(10/40 Pages) AMSCO

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[v1-01] 2015-May-12

AS5147P − Detailed Description

Power Management

The AS5147P can be either powered from a 5.0V supply using

the on-chip low-dropout regulator or from a 3.3V voltage

supply. The LDO regulator is not intended to power any other

loads, and it needs a 1 μF capacitor to ground located close to

the chip for decoupling as shown in Figure 11.

In 3.3V operation, VDD and VREG must be tied together. In this

configuration, normal noise performance (ONL) is available at

reduced maximum temperature (125°C) by clearing NOISESET

to 0. When NOISESET is set to 1, the full temperature range is

available with reduced noise performance (ONH).

Figure 10:

Temperature Range and Output Noise in 3.3V and 5.0V Mode

Figure 11:

5.0V and 3.3V Power Supply Options

After applying power to the chip, the power-on time (tpon) must

elapse before the AS5147P provides the first valid data.

VDD (V)

NOISESET

Temperature Range (°C)

RMS Output Noise (degree)

5.0

-40 to 150

0.068

3.3

-40 to 125

0.068

3.3

-40 to 150

0.082

1µF

100n

4.5 - 5.5V

VDD3V3

GND

VDD

5.0V Operation

LDO

AS5147P

100n

3.0 – 3.6V

VDD3V3

GND

VDD

3.3V Operation

LDO

AS5147P

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