STM32WL33CB datasheet(44/91 Pages) STMICROELECTRONICS

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6.3.4

RF general characteristics

All performance data are referred to a 50 Ω antenna connector, via reference design.

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

priority is given to the performances, and low power mode (LPM) where the priority is given to the low

consumption.

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

otherwise stated), SMPS Vout = 1.4 V,16 MHz system clock, HSIPLL mode, HSE GMC setting 0x0A and

PA_LEVEL7 = 81.

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

otherwise stated), SMPS Vout =1.2 V, LDO RF bypassed, 16 MHz system clock, HSE direct mode, HSE GMC

setting 0x0A.

For RX current consumption, the global SOC consumption is reported as well as the computed contribution due to

the sub-1 GHz radio alone (difference between the global consumption and the SOC consumption in WFI mode).

Transmission measurements are performed for VDD = 3.3 V, TA = 25 o C, SMPS ON, high performance mode

(HPM).

Table 17. Current consumption in reception, fc = 915 MHz

Parameter

Test condition

HPM

LPM

Unit

STM32WL33xx supply current

As detailed above

7.0

5.7

CPU current

CPU in WFI state

1.8

1.3

Radio supply current contribution

Computed value

5.2

4.4

Table 18. Current consumption in reception, fc = 868 MHz (SMPS clock frequency = 4.27 MHz)

Parameter

Test condition

HPM

LPM

Unit

STM32WL33xx supply current

As detailed above

6.8

5.6

CPU current

CPU in WFI state

1.8

1.3

Radio supply current contribution

Computed value

5.0

4.3

Table 19. Current consumption in reception, fc = 433 MHz

Parameter

Test condition

HPM

LPM

Unit

STM32WL33xx supply current

As detailed above

6.7

5.5

CPU current

CPU in WFI state

1.8

1.3

Radio supply current contribution

Computed value

4.9

4.2

Table 20. Current consumption in transmission, fc = 433 MHz

Parameter

Test condition

HPM

Unit

Supply current

Measurements TX @ CW 10 dBm

TX pin connected, TX Mode

12.5

Measurements TX @ CW 14 dBm

TXHP pin connected, TXHP mode

Measurements TX @ CW 16 dBm

TXHP pin connected, TXHP mode PA_DEGEN_ON

VSMPS = 1.6 V

STM32WL33xx

Electrical characteristics

DS14221 - Rev 5

page 44/91

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