S2-LPS datasheet(15/73 Pages) STMICROELECTRONICS

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3.8.4

Sensitivity at 840-868 MHz

Table 20. Sensitivity at 840-868 MHz

Parameter

Test conditions

HPM/LPM/SMPS on typ.

Unit

Sensitivity

1% BER @ 2-GFSK BT = 0.5

DR = 38.4 kbps, FDEV = 20 kHz, CHF = 100 kHz

-109

dBm

Sensitivity

1% BER @ OOK

DR = 0.3 kbps, CHF = 1 kHz

-120

dBm

DR = 1.2 kbps, CHF = 4 kHz

-118

DR = 38.4 kbps, CHF = 100 kHz

-104

3.9

RF transmitter

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

are referred to 25 °C temperature, VBAT = 3.3 V. All performance is referred to the STEVAL-FKI433V2 or

STEVAL-FKI868V2 with a 50 Ω antenna connector.

Table 21. RF transmitter characteristics

Parameter

Test conditions

HPM typ.

LPM typ.

Unit

Maximum output power

CW @ antenna level

dBm

Maximum output power in boost mode

CW @ antenna level

Minimum output power

CW @ antenna level

-30

Output power step

-10<=output power<=+10 dBm

0.5

Output power step (1)

Output power>+10 dBm

1(1)

1. In this case the register 0x64 is set to 0x4A.

Table 22. PA impedance

Parameter

Test conditions

Typ.

Unit

Optimum load impedance

433 MHz

56+25j

Ω

868 MHz

30+24j

Max permitted VSWR @ antenna level

433 MHz

868 MHz

Table 23. Regulatory standards

Frequency band

Suitable for compliance with:

413 - 479 MHz

ETSI EN300 220 category 1.5

FCC part 15, FCC part 90

826 - 958 MHz

ETSI EN300 220-2 category 1.5

FCC part 15

ARIB STD-T108

Chinese SRRC

S2-LPS

RF transmitter

DS13831 - Rev 1

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