SM1212E433 datasheet(10/77 Pages) SEMTECH

Teilenummer	SM1212E433

Bauteilbeschribung	Ultra-Low Power Integrated 300-510MHz Transceiver

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SX1212

ADVANCED COMMUNICATIONS & SENSING

Rev 2 – June 18th, 2009

Page 10 of 77

www.semtech.com

2.4.4. Receiver

On the following table, fc and fo describe the bandwidth of the active channel filters as described in section 3.4.4.2.

All sensitivities are measured receiving a PN15 sequence, for a BER of 0.1.%

Table 8: Receiver Specification

Symbol

Description

Conditions

Min

Typ

Max

Unit

434 MHz, BR=25 kb/s, Fdev

=50 kHz, fc=100 kHz

-

-104

-

dBm

-

RFS_F

Sensitivity (FSK)

-

434 MHz, 2kb/s NRZ

fc-fo=50 kHz, fo=50 kHz

-

-110

-

dBm

-

RFS_O

Sensitivity (OOK)

-

CCR

Co-channel rejection

Modulation as wanted signal

-

-12

-

dBc

Offset = 300 kHz

-

dB

Offset = 600 kHz

-

42

-

dB

ACR

Adjacent channel

rejection

Offset = 1.2 MHz

-

53

-

dB

Offset = 1 MHz,

unmodulated

-

53

-

dBc

Offset = 2 MHz,

unmodulated, no SAW

-

BI

Blocking immunity

Offset = 10 MHz,

unmodulated, no SAW

-

RXBW_F

(1,2)

Receiver bandwidth in

FSK mode

Single side BW

Polyphase Off

50

-

250

kHz

RXBW_O

(1,2)

Receiver bandwidth in

OOK mode

Single side BW

Polyphase On

50

-

400

kHz

IIP3

Input 3

rd order intercept

point

Interferers at 1MHz and

1.950 MHz offset

-

-28

-

dBm

TS_RE

(1)

Receiver wake-up time

From FS to Rx ready

-

280

500

µs

TS_RE2

(1)

Receiver wake-up time

From Stby to Rx ready

-

600

900

µs

200 kHz step

-

400

-

µs

1MHz step

-

400

-

µs

5MHz step

-

460

-

µs

7MHz step

-

480

-

µs

12MHz step

-

520

-

µs

20MHz step

-

550

-

µs

TS_RE_HOP

Receiver hop time from

Rx ready to Rx ready with

a frequency hop

27MHz step

-

600

-

µs

TS_RSSI

RSSI sampling time

From Rx ready

-

1/Fdev

s

DR_RSSI

RSSI dynamic Range

Ranging from sensitivity

-

70

-

dB

(1) Information from design and characterization

(2) This reflects the whole receiver bandwidth, as described in sections 3.4.4.1 and 3.4.4.2

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