S2-LP datasheet(20/90 Pages) STMICROELECTRONICS

20 / 90 page

Specifications

S2-LP

20/90

DocID029944 Rev 1

Table 17: RF receiver characteristics

Parameter

Test condition

SMPS on

Unit

Receiver channel

bandwidth CHF

1-800

kHz

RX input return loss

Max RX gain, tied (RX + TX) matching

networks

433 MHz

-15

868 MHz

-15

Saturation 1% BER

2-FSK 1.2 kHz FDEV, DR = 1.2 kbps,

CHF = 4 kHz

433 MHz

dBm

868 MHz

Input third order

intercept point

Interferers are continuous wave @ 6 MHz

and 12 MHz offset from carrier.

433 MHz

-23

868 MHz

-20

RX noise figure

Max RX gain, tied (RX + TX) matching

networks

433 MHz

8.5

868 MHz

8.5

Differential input

impedance at LNA

Max RX gain

R // C

433 MHz

200 // 1.5

Ω//pF

868 MHz

200 // 1.5

4.8.1

Blocking and selectivity at 433 MHz

Table 18: Blocking and selectivity at 433 MHz

Parameter

Test condition

SMPS on

Unit

Selectivity and blocking 1%

BER @ 2-GFSK BT=0.5 1.2 kHz FDEV, DR =

1.2 kbps, CHF = 4 kHz

+12.5 kHz (adjacent channel)

-12.5 kHz (adjacent channel)

+25 kHz (alternate channel)

-25 kHz (alternate channel)

Image rejection

±2 MHz

±10 MHz

Selectivity and blocking 1%

BER @ 2-GFSK BT=0.5 20 kHz FDEV, DR =

38.4 kbps, CHF = 100 kHz

+100 kHz (adjacent channel)

-100 kHz (adjacent channel)

+200 kHz (alternate channel)

-200 kHz (alternate channel)

Image rejection

±2 MHz

±10 MHz

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