SX1240 Просмотр технического описания (PDF) - Semtech Corporation
Номер в каталоге
Компоненты Описание
производитель
SX1240 Datasheet PDF : 20 Pages
| |||
ADVANCED COMMUNICATIONS & SENSING
SX1240
Integrated Transmitter IC
DATASHEET
2.4. Electrical Specifications
The table below gives the electrical specifications of the transmitter under the following conditions: Supply voltage = 3.3 V,
temperature = 25 °C, fXOSC = 26 MHz, fRF = 433.93 MHz, 2-level FSK modulation Df = 20 kHz, bit rate = 10 kbit/s and
output power = +10 dBm terminated in a matched 50 ohm impedance, unless otherwise specified.
Table 4 Transmitter Specifications
Symbol Description
Conditions
Min
Current Consumption
IDDSL
Supply current in sleep mode
-
IDDT
Supply current in transmit mode
RF Power o/p = +10 dBm
-
with appropriate external match- RF Power o/p = 0 dBm
-
ing.
RF and Baseband Specifications
FDA_D
Frequency deviation, FSK
Number of programmable values
-
FDA
Frequency deviation, FSK*
10
BRF
Bit rate, FSK
Permissible Range
0.5
BRO
Bit rate, OOK
Permissible Range
0.5
OOK_B OOK Modulation Depth
-
RFOP
RF output power in 50 ohms
High Power Setting 7
Low Power Setting** -3
DRFOPV Variation in RF output power with
supply voltage
2.5 V to 3.3 V -
1.8 V to 3.7 V -
PHN
Transmitter phase noise at
868.3 MHz
Offset from centre frequency:
100 kHz -
350 kHz -
550 kHz -
1.15 MHz -
FR
Number of selectable Frequencies
-
FXOSC Crystal Oscillator Frequency
26
STEP
RF Frequency Step
868 MHz -
434 MHz -
DFXOSC Frequency Variation of the Oscilla- No crystal contribution
-
tor Circuit
Timing Specifications
TS_TR
Time from Sleep to Tx mode
-
TOFFT
Timer from Tx data activity to
Sleep
Programmable -
-
RAMP
PA Ramp up and down time
**** -
Typ
Max Unit
0.5
1 µA
16.5
- mA
9
- mA
8
-
-
-
50
10
0
-
-
-
-
-
-
8
26
3.174
1.587
-
-
100 kHz
100 kbps
10 kbps
- dB
- dBm
- dBm
3 dB
7 dB
-76
-81
-91
-101
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
-
26 MHz
- kHz
- kHz
+/-25 ppm
-
2 ms
2
- ms
20
- ms
20
- us
SX1240, Rev 1, Oct 2010
©2010 Semtech Corp.
Page 6
www.semtech.com
Share Link: 