STM32WB55CC datasheet(116/165 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32WB55xx

116/165

DS11929 Rev 3

6.3.12

PLL characteristics

The parameters given in Table 60 are derived from tests performed under temperature and

VDD supply voltage conditions summarized in Table 22: General operating conditions.

Table 59. LSI2 oscillator characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max Unit

fLSI2

LSI2 frequency

VDD = 3.0 V, TA = 30 °C

21.6

44.2

kHz

VDD = 1.62 to 3.6 V, TA = -40 to 125 °C 21.2

44.4

tSU(LSI2)(2) LSI2 oscillator start-up time

0.7

3.5

IDD(LSI2)(2)

LSI2 oscillator power

consumption

500 1180

∆Tmax(LSI2)

Allowed temperature change

during sleep duration(3)

1.5

0.4

°C

1. Guaranteed by characterization results.

2. Guaranteed by design.

3. Includes accuracy of 32 Mhz crystal.

Table 60. PLL, PLLSAI1 characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fPLL_IN

PLL input clock(2)

-4

MHz

PLL input clock duty cycle

fPLL_P_OUT PLL multiplier output clock P

Voltage scaling Range 1

MHz

Voltage scaling Range 2

fPLL_Q_OUT PLL multiplier output clock Q

Voltage scaling Range 1

Voltage scaling Range 2

fPLL_R_OUT PLL multiplier output clock R

Voltage scaling Range 1

Voltage scaling Range 2

fVCO_OUT PLL VCO output

Voltage scaling Range 1

344

Voltage scaling Range 2

128

tLOCK

PLL lock time

μs

Jitter

RMS cycle-to-cycle jitter

System clock 64 MHz

-40

RMS period jitter

IDD(PLL)

PLL power consumption

on VDD(1)

VCO freq = 96 MHz

200

260

μA

VCO freq = 192 MHz

300

380

VCO freq = 344 MHz

520

650

1. Guaranteed by design.

2. Take care of using the appropriate division factor M to obtain the specified PLL input clock values. The M factor is shared

between the two PLLs.

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