SI4438-C datasheet(6/44 Pages) SILABS

No. de pieza	SI4438-C

Descripción Electrónicos	Low active power consumption

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Fabricante Electrónico	SILABS [Silicon Laboratories]

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Si4438-C

6

Rev 1.0

Table 3. Receiver AC Electrical Characteristics1

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

RX Frequency

Range (Si4438)

FRX

425

—

525

MHz

RX Sensitivity2

PRX_0.5

(BER < 0.1%)

(500 bps, GFSK, BT = 0.5,

f = 250Hz)2

—

–124

—

dBm

PRX_40

(BER < 0.1%)

(40 kbps, GFSK, BT = 0.5,

f = 20 kHz)2

—

–108

—

dBm

PRX_100

(BER < 0.1%)

(100 kbps, GFSK, BT = 0.5,

f = 50 kHz)1

—

–104

—

dBm

PRX_9.6

(BER < 0.1%)

(9.6 kbps, GFSK, BT = 0.5,

f = 4.8 kHz)2

—

–114

—

dBm

PRX_OOK

(BER < 0.1%, 4.8 kbps, 350 kHz BW,

OOK, PN15 data)2

—

–108

—

dBm

(BER < 0.1%, 40 kbps, 350 kHz BW,

OOK, PN15 data)2

—

–102

—

dBm

(BER < 0.1%, 120 kbps, 350 kHz BW,

OOK, PN15 data)2

—

–98

—

dBm

RX Channel Bandwidth

BW

1.1

—

850

kHz

RSSI Resolution

RESRSSI

—

±0.5

—

dB

1-Ch Offset Selectivity,

450 MHz2

C/I1-CH

Desired Ref Signal 3 dB above sensitiv-

ity, BER < 0.1%. Interferer is CW, and

desired is modulated with 2.4 kbps

F = 1.2 kHz GFSK with BT = 0.5, RX

channel BW = 4.8 kHz,

channel spacing = 12.5 kHz

—

–60

—

dB

Blocking 1 MHz Offset2

1MBLOCK Desired Ref Signal 3 dB above sensitiv-

ity, BER = 0.1%. Interferer is CW, and

desired is modulated with 2.4 kbps,

F = 1.2 kHz GFSK with BT = 0.5,

RX channel BW = 4.8 kHz

—

–77

—

dB

Blocking 8 MHz Offset2

8MBLOCK

—

–84

—

dB

Image Rejection

ImREJ

Rejection at the image frequency.

IF = 468 kHz

—40—

dB

Notes:

1. All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and

from –40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated.

2. Measured over 50000 bits using PN9 data sequence and data and clock on GPIOs. Sensitivity is expected to be better

if reading data from packet handler FIFO especially at higher data rates.

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