S2-LP datasheet(16/90 Pages) STMICROELECTRONICS

16 / 90 page

Specifications

S2-LP

16/90

DocID029944 Rev 1

4.4

Power consumption

Characteristics measured over recommended operating conditions unless otherwise

specified. Typical values are referred to 25 °C temperature, VBAT = 3.0 V. All performance

is referred to a 50

Ω antenna connector.

Table 7: Low-power states power consumption

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Supply current

Shutdown

2.5

Standby

350

Sleep

600

Sleep (FIFOs retained)

0.9

µA

Ready

350

Table 8: Power consumption in reception TA = 25°C, VDD = 3.0 V, fc = 868 MHz

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Supply current

RX @ sensitivity level

RX in sniff mode @ 1.2 kbps(1)

0.9

RX in sniff mode @ 38.4 kbps(2)

0.8

RX in LDC mode @ 1.2 kbps(3)

µA

RX in LDC mode @ 38.4 kbps(4)

Notes:

(1)Using 2-FSK 2.4 kHz DEV, DR=1.2 kbps, 4 bytes preamble and 8kHz ch. filter. Where the receiver wakes up at

regular intervals to look for an incoming packet.

(2)Using 2-FSK 20 kHz DEV, DR=38.4 kbps, 24 bytes preamble and 100kHz ch. filter. Where the receiver wakes

up at regular intervals to look for an incoming packet.

(3)Check for data packet every 1 second in LDC mode. 2-FSK 1.2 kHz DEV and 8kHz ch. filter, DR=1.2 kbps,

internal RC oscillator used as sleep timer. Sniff timer enabled.

(4)Check for data packet every 1 second in LDC mode. 2-FSK 20 kHz DEV, DR=38.4 kbps and 100 kHz ch. filter,

internal 34.6 kHz RC oscillator used as sleep timer. Sniff timer enabled.

Table 9: Power consumption in transmission fc= 920 MHz

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Supply current

TX CW @ 14 dBm

20.6

TX CW @ 10 dBm

11.7

TX CW @ 16 dBm in Boost(1)

Notes:

(1)SMPS output voltage 1.8 V

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