SX1211I084T datasheet(9/92 Pages) SEMTECH

Part #	SX1211I084T

Description	Ultra-Low Power Integrated UHF Transceiver

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Manufacturer	SEMTECH [Semtech Corporation]

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SX1211

ADVANCED COMMUNICATIONS & SENSING

Rev 7 – Sept 2

nd, 2008

Page 9 of 92

www.semtech.com

2.4.2. Frequency Synthesis

Table 6: Frequency Synthesizer Specification

(1) Guaranteed by design and characterization

2.4.3. Transmitter

Table 7: Transmitter Specification

(1) Guaranteed by design and characterization

Symbol

Description

Conditions

Min

Typ

Max

Unit

FR

Frequency ranges

Programmable but requires

specific BOM

863

902

950

-

870

928

960

MHz

BR_F

Bit rate (FSK)

NRZ

1.56

-

200

Kb/s

BR_O

Bit rate (OOK)

NRZ

1.56

-

32

Kb/s

FDA

Frequency deviation (FSK)

33

50

200

kHz

XTAL

Crystal oscillator frequency

9

12.8

15

MHz

FSTEP

Frequency synthesizer

step

Variable, depending on the

frequency.

-

2

-

kHz

TS_OSC

Oscillator wake-up time

From Sleep mode

(1)

-

1.5

5

ms

TS_FS

Frequency synthesizer

wake-up time at most

10 kHz away from the

target

From Stby mode

-

500

800

µs

200 kHz step

-

180

-

µs

1 MHz step

-

200

-

µs

5 MHz step

-

250

-

µs

7 MHz step

-

260

-

µs

12 MHz step

-

290

-

µs

20 MHz step

-

320

-

µs

TS_HOP

Frequency synthesizer hop

time at most 10 kHz away

from the target

27 MHz step

-

340

-

µs

Symbol

Description

Conditions

Min

Typ

Max

Unit

Maximum power setting

-

+12.5

-

dBm

RFOP

RF output power,

programmable with 8 steps

of typ. 3dB

Minimum power setting

-

-8.5

-

dBm

PN

Phase noise

Measured with a 600 kHz

offset, at the transmitter

output.

-

-112

-

dBc/Hz

SPT

Transmitted spurious

At any offset between

200 kHz and 600 kHz,

unmodulated carrier, Fdev

= 50 kHz.

-

-47

dBc

TS_TR

(1)

Transmitter wake-up time

From FS to Tx ready.

-

120

500

µs

TS_TR2

(1)

Transmitter wake-up time

From Stby to Tx ready.

-

600

900

µs

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