SX1211I084TRT(2007) データシートの表示（PDF） - Semtech Corporation

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SX1211I084TRT
(Rev.:2007)

Lowest Power Integrated UHF Transceiver Short Range Devices

Semtech Corporation 

ADVANCED COMMUNICATIONS & SENSING

SX1211

2.4.2. Frequency Synthesis

Table 6: Frequency Synthesizer Specification

Symbol

FR

BR_F

BR_O

FDA

XTAL

FSTEP

TS_OSC

TS_FS

TS_HOP

Description

Frequency ranges

Bit rate (FSK)

Bit rate (OOK)

Frequency deviation (FSK)

Crystal oscillator frequency

Frequency synthesizer

step

Oscillator wake-up time

Frequency synthesizer

wake-up time

Frequency synthesizer hop

time

Conditions

Programmable but requires

a specific BOM.

NRZ

NRZ

Variable, depending on the

frequency.

From sleep mode.

From Stby to frequency at

most 10 kHz away from the

target.

200 kHz step at most

10 kHz away from the

target

1MHz step at most 10 kHz

away from the target

10 MHz step at most

10 kHz away from the

target

Min

863

902

950

1.56

1.56

33

12

-

-

-

-

-

-

2.4.3. Transmitter

Typ

-

-

-

-

-

50

12.8

2

1.5

500

Max

870

928

960

100

32

200

15

-

5

800

200

-

220

-

350

-

Unit

MHz

MHz

MHz

kb/s

kb/s

kHz

MHz

kHz

ms

µs

µs

µs

µs

Table 7: Transmitter Specification

Symbol

RFOP

PN

SPT

TS_TR

TS_TR2

Description

RF output power,

programmable with 8 steps

of typ. 3dB

Phase noise

Transmitted spurious

Conditions

Maximum power setting

Minimum power setting

Measured with a 600 kHz

offset, at the transmitter

output.

At any offset between

200 kHz and 600 kHz,

unmodulated carrier, Fdev

= 50 kHz.

Transmitter wake-up time From FS to Tx ready.

Transmitter wake-up time From Stby to Tx ready.

Min

-

-

-

-

-

-

Typ

12.5

-8.5

Max

-

-

-112

-

Unit

dBm

dBc/Hz

-

-47

dBc

120

500 µs

600

900 µs

V3.0 – august 15th, 2007

Page 9 of 73

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