L9924L datasheet(42/84 Pages) STMICROELECTRONICS

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Electrical specifications

L9924L

42/84

DocID028840 Rev 3

4.3.17

VREF_ADC

At VREF_ADC pad of the smart power it is available a precise voltage supplied to the AIN2

pin of the microcontroller [11] to allow a software calibration of the conversion obtained with

the ADC.

Figure 20. Internal voltage reference for ADC

Table 25. Electrical characteristics pin "RC"

Symbol

Parameter

Test Condition

Min.

Typ.

Max. Unit

1VRCHTh1(1) High level threshold voltage 1 -

3.1

3.3

3.5

2VRCLTh1(1)

Low level threshold voltage 1

(SPI configurable)

1.3

1.5

1.7

3VRChyst1

Voltage threshold hysteresis 1 -

1.8

4VRCHTh2 (1) High level threshold voltage 2 SPI default

3.1

3.3

3.5

5VRCLTh2(1)

Low level threshold voltage 2

(SPI configurable)

SPI default

2.3

2.5

2.7

6VRChyst2

Voltage threshold hysteresis 2 SPI default

0.8

7VRCLTh_WU

Low level threshold voltage for

wake-up

Power stand-by mode

RC falling edge wake-up

2.3

2.5

2.7

8VRCHTh_WU

High level threshold voltage for

wake-up

Power stand-by mode

RC rising edge wake-up

3.1

3.3

3.5

9fRCVR

Valid frequency range

100

500

tRCMIN

Communication rejected with

tON or tOFF < tRCMIN

-10

µs

1. VRCHThx and VRCLThx parameters are in tracking

Table 26. Electrical characteristics “VREF_ADC”

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

1VREFADC

Output voltage

4.257

4,3

4.343

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