STM32WB15CC datasheet(63/127 Pages) STMICROELECTRONICS

63 / 127 page

DS13258 Rev 4

63/127

STM32WB15CC

Electrical characteristics

115

Table 23. RF transmitter BLE characteristics (1 Mbps)(1)

Symbol

Parameter

Test conditions

Min

Typ Max

Unit

Prf

Maximum output power

SMPS Bypass (VDD > 1.71 V) or ON

(VFBSMPS = 1.7 V and

VDD > 1.95 V)(2)

-5.5

dBm

SMPS Bypass or ON



(VFBSMPS = 1.4 V and

VDD > 1.71 V), Code 29(2)

-3.6

0 dBm output power

Minimum output power

-20

Pband

Output power variation over the band Tx = 0 dBm - Typical

-0.5

0.4

BWdB

6 dB signal bandwidth

Tx = max output power

670

kHz

IBSE

In band spurious emission

2 MHz

Bluetooth® Low Energy:-20 dBm

-50

dBm

≥ 3 MHz Bluetooth® Low Energy: -30 dBm

-53

Frequency drift

Bluetooth® Low Energy: ±50 kHz

-50

+50

kHz

maxdr

Maximum drift rate

Bluetooth® Low Energy:



±20 kHz / 50 µs

-20

+20

kHz/

50 µs

Frequency offset

Bluetooth® Low Energy:



±150 kHz

-150

+150

kHz

∆f1

Frequency deviation average

Bluetooth® Low Energy:



between 225 and 275 kHz

225

275

∆fa

Frequency deviation



∆f2 (average) / ∆f1 (average)

Bluetooth® Low Energy:> 0.80

0.80

OBSE(3)

Out of band



spurious emission

< 1 GHz

-62

dBm

≥ 1 GHz

-45

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). Code 29 means Tx power (PA_Level) selection 29

(25 being 0 dbm).

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).

Table 24. RF transmitter BLE characteristics (2 Mbps)(1)

Symbol

Parameter

Test conditions

Min Typ Max

Unit

Prf

Maximum output power

SMPS Bypass (VDD > 1.71 V) or ON

(VFBSMPS = 1.7 V and

VDD > 1.95 V)(2)

-5.5

dBm

SMPS Bypass or ON



(VFBSMPS = 1.4 V and

VDD > 1.71 V), Code 29(2)

-3.6

0 dBm output power

Minimum output power

-20

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