SX1223SK868【PDF 5/25 页】KIT STARTER FOR XE1223 868MHZ

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SX1223

3

ELECTRICAL CHARACTERISTICS

3.1 ABSOLUTE MAXIMUM OPERATING RANGES

Stresses above the values listed below may cause permanent device failure. Exposure to absolute maximum

ratings for extended periods may affect device reliability.

Symbol

VDDmax

Tmax

Description

Supply voltage

Storage temperature

Min.

-0.4

-55

Max.

3.9

125

Unit

V

°C

The device is ESD sensitive and should be handled with precaution.

3.2

3.2.1

SPECIFICATIONS

Operating Range

Symbol

VDD

T

CLop

Description

Supply voltage (*)

Temperature

Load capacitance on digital ports

Min.

2.0

-40

-

Max.

3.6

85

25

Unit

V

°C

pF

(*) Divided in two ranges:

- (sv1) high range, 2.2 V – 3.6 V, using on-chip regulators,

- (sv2) low range, 2.0 V – 2.5 V, without using the regulators.

3.2.2

Electrical Specifications

The table below gives the electrical specifications of the transmitter under the following conditions:

Supply Voltage = 3.3 V, temperature = 25 °C, 2-leve l FSK, fc = 915 MHz, Output power = 10 dBm, Bit rate = 38.4

kb/s, ? f = 100 kHz, XTAL = 16 MHz, modulation by pulling the VCO in open loop (mw2), and conditions as defined

in section 6, unless otherwise specified.

Symbol

IDDSL

Description

Supply current in sleep

Conditions

Min

-

Typ

0.3

Max

1

Unit

μA

mode

IDDST

Supply current in standby

Crystal oscillator running,

-

0.2

0.3

mA

mode

CLKOUT off

IDDFS

Supply current in FS mode

Frequency synthesizer

-

5

6

mA

running

IDDT

FR

Supply current during

transmission

Frequency range

10 dBm

0dBm

-

-

425

25.8

14

-

-

-

475

mA

mA

MHz

850

-

950

MHz

FDA

FDA_L

? FDA

BR

BR_3

SPICLK

Frequency deviation

Frequency deviation

Variation of frequency

deviation

Bit rate

Bit rate for mw3 mode

SPI clock frequency (SCK)

For FR from 850 to 950 MHz

For FR from 425 to 475 MHz

Modulation modes mw1 mw2

Modulation mode mw3

SCK duty cycle 50% +/-10%

5

5

- 15

1.2

1.2

-

-

-

-

-

255

200

+ 15

153.6

19.2

1

kHz

kHz

%

kbit/s

kbit/s

MHz

? Semtech 2007

5

www.semtech.com

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