BLUENRG-2 datasheet(176/190 Pages) STMICROELECTRONICS

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Electrical specifications

BlueNRG-2

176/190

DocID030675 Rev 2

9.9

N-fractional frequency synthesizer characteristics

Characteristics measured over recommended operating conditions unless otherwise

specified. Typical value are referred to TA = 25 °C, VBAT =3.0 V, fc = 2440 MHz.

Table 226: N-Fractional frequency synthesizer characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

PNSYNTH

RF carrier phase noise

At ±1 MHz offset from carrier

–

-113

–

dBc/Hz

At ±3 MHz offset from carrier

–

-119

–

dBc/Hz

LOCKTIME

PLL lock time

–

µs

TOTIME

PLL turn on / hop time

Including calibration

–

150

µs

9.10

Auxiliary blocks characteristics

Characteristics measured over recommended operating conditions unless otherwise

specified. Typical values are referenced to TA = 25 °C, VBAT =3.0 V, f_ADCclk=1 MHz. QFN32

package version.

Table 227: Auxiliary blocks characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Analog-to-digital converter (ADC)

VDDA

Analog supply

voltage

1.7

3.0

3.6

IDDA, AVG

Analog supply

current

Average current during

conversion

–

0.460

VINP, iNN

Input pin

voltage

With input attenuator

-50

–

(VBAT+50

mV) / Input

attenuation

SNR Diff

Signal to noise

ratio

Differential input, with

Vbias = 0.6V, OSR =

200, PGA=0 dB.

Sinewave with

VinDC=0.6V, Vpeak diff

= 0.85 V, Fin = 1KHz

–

SNR SE 1

Signal to noise

ratio

Single ended input, with

Vbias = 0.6V, OSR =

200, PGA=0 dB.

Sinewave with

VinDC=0.6V, Vpeak =

0.425 V, Fin = 1KHz

–

SNR SE 2

Signal to noise

ratio

Single ended input, with

Vbias = 1.2V, OSR =

200, PGA=0 dB.

Sinewave with

VinDC=1.2V, Vpeak =

0.85 V, Fin = 1KHz

–

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