SPC572LX datasheet(47/112 Pages) STMICROELECTRONICS

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SPC572Lx

Electrical characteristics

111

Table 25. SARn ADC electrical specification(1)

Symbol

Parameter

Conditions

Value

Unit

Min

Max

VALTREF

P ADC alternate

reference voltage

VALTREF < VDD_HV_IO_MAIN

VALTREF < VDD_HV_ADV

4.5

5.5

C2.0

4.0

C4.0

5.9

VIN

D ADC input signal

0 < VIN < VDD_HV_IO_MAIN

VSS_HV_ADR

VDD_HV_ADR

fADCK

P Clock frequency

TJ < 150 °C

7.5

14.6

MHz

tADCPRECH SR

T ADC precharge time

Fast SAR—fast precharge

135

—

Fast SAR—full precharge

270

—

Slow SAR (SARADC_B)(2)—

fast precharge

270

—

Slow SAR (SARADC_B)(2)—

full precharge

540

—

ΔVPRECH

D ADC precharge voltage Full precharge

VPRECH = VDD_HV_ADR/2

TJ <150 °C

–0.25

0.25

Fast precharge

VPRECH = VDD_HV_ADR/2

TJ <150 °C

–0.5

0.5

ΔVINTREF

P Internal reference

voltage precision

Applies to all internal

reference points

(VSS_HV_ADR,

1/3 * VDD_HV_ADR,

2/3 * VDD_HV_ADR,

VDD_HV_ADR)

−0.20

0.20

tADCSAMPLE SR

P ADC sample time(3)

Fast SAR – 12-bit

configuration

0.750

—

µs

Fast SAR – 10-bit

configuration

0.555

—

Slow SAR (SARADC_B)(2) –

12-bit configuration

1.500

—

Slow SAR (SARADC_B)(2) –

10-bit configuration

0.833

—

tADCEVAL

P ADC evaluation time

12-bit configuration (25 clock

cycles)

1.712

—

µs

10-bit configuration (21 clock

cycles)

1.458

—

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