STM32WB55CC_V02 datasheet(90/193 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32WB55xx STM32WB35xx

90/193

DS11929 Rev 11

Table 27. RF transmitter BLE characteristics (2 Mbps)(1)

Symbol

Parameter

Test conditions

Min

Typ Max

Unit

Prf

Maximum output power

SMPS Bypass or ON



(VFBSMPS = 1.7 V and

VDD > 1.95 V)(2)

-6.0

dBm

SMPS Bypass or ON



(VFBSMPS = 1.4 V and

VDD > 1.71 V), Code 29(2)

-3.7

0 dBm output power

Minimum output power

-20

Pband

Output power variation over the band

Tx = 0 dBm - Typical

-0.5

0.4

BW6dB

6 dB signal bandwidth

Tx = maximum output power

670

kHz

IBSE

In band spurious emission

4 MHz

Bluetooth® Low Energy: -20 dBm

-56

dBm

5 MHz

Bluetooth® Low Energy: -20 dBm

-57

≥ 6 MHz

Bluetooth® Low Energy: -30 dBm

-58

Frequency drift

Bluetooth® Low Energy: ±50 kHz

-50

kHz

maxdr

Maximum drift rate

Bluetooth® Low Energy:



±20 kHz / 50 µs

-20

kHz/

50 µs

Frequency offset

Bluetooth® Low Energy: ±150 kHz -150

150

kHz

∆f1

Frequency deviation average

Bluetooth® Low Energy:



between 450 and 550 kHz

450

550

∆fa

Frequency deviation



∆f2 (average) / ∆f1 (average)

Bluetooth® Low Energy:> 0.80

0.80

OBSE(3)

Out of band



spurious emission

< 1 GHz

-61

dBm

≥ 1 GHz

-46

1. Measured in conducted mode, based on reference design (see AN5165), using output power specific external RF filter and

impedance matching networks to interface with a 50 Ω antenna.

2. VFBSMPS and VDD must be set to different voltage levels, depending upon the desired TX signal (see AN5246 Usage of

SMPS on STM32WB Series microcontrollers, available on www.st.com).

3. Suitable for systems targeting compliance with worldwide radio-frequency regulations ETSI EN 300 328 and EN 300 440

Class 2 (Europe), FCC CFR47 Part 15 (US), and ARIB STD-T66 (Japan).

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