STM32WL33C8 datasheet(46/91 Pages) STMICROELECTRONICS

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If "Manchester" or "3-out-of-6" or FEC coding options are enabled the actual bit rate is affected as follows:

Table 25. Data rate with different coding options

Coding option

2GFSK[kbit/s]

4GFSK[kbit/s]

NRZ

300

600

FEC

150

300

Manchester

150

Not supported

3-out-of-6

200

Not supported

6.3.5

RF receiver

Characteristics measured over recommended operating conditions unless otherwise specified. All typical values

are referred to 25°C temperature, VBAT = 3.3 V, no frequency offset in the RX signal.

All performance figures are referred to the reference designs optimized for each different configuration. The

reference designs associated with each configuration are listed below:

•

169 MHz: STDES-WL3C4EEW

•

433 MHz: STDES-WL3C4SML

•

868 MHz: STDES-WL3C4SMH

•

915 MHz: STDES-WL3C4SHH

Two reference test conditions are used in the RX measurements: High performance mode (HPM), where the

priority is given to the performances, Low power mode (LPM) where the priority is given to the low consumption.

•

High performance mode (HPM) conditions: VDD = 3.3V, TA = 25o C, SMPS ON, SMPS frequency 4 MHz

(unless otherwise stated), SMPS Vout =1.4V, 16 MHz system clock, HSIPLL mode, HSE GMC setting

0x0A.

•

Low power mode (LPM) conditions: SMPS ON, SMPS frequency 4MHz (unless otherwise stated), SMPS

Vout =1.2V, LDO RF bypassed, 16 MHz system clock, HSE direct mode, HSE GMC setting 0x0A.

RX blocking and selectivity tests are performed in ETSI conditions: the wanted signal is 3dB higher than the ETSI

sensitivity, given by the following formula:

ETSI_sensitivity = 10 log CHFkHz - 117 dBm

Table 26. RF receiver characteristics

Parameter

Description

Typical value Unit

Receiver channel bandwidth range -

1.8-1100

kHz

Rx maximum power

RF input power in RX operation mode

dBm

Input third order intercept point

Interferers are continuous wave @ 6 MHz and 12 MHz

offset from carrier

433 MHz

-19

dBm

868 MHz

-19

Input impedance at LNA

Max. RX gain R // C

433 MHz

151-j103

868 MHz

51-j107

169 MHz

176 - j265

STM32WL33xx

Electrical characteristics

DS14221 - Rev 5

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