|
|
PDF SX1240 Data sheet ( Hoja de datos )
| Número de pieza | SX1240 | |
| Descripción | Low Cost Integrated Transmitter IC | |
| Fabricantes | Semtech | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de SX1240 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
SX1240
ADVANCED COMMUNICATIONS & SENSING
SX1240 - Low Cost Integrated Transmitter IC
434 MHz and 868 MHz Band RF Transmitter
DATASHEET
GENERAL DESCRIPTION
The SX1240 is an ultra-low-cost, fully integrated FSK or
OOK compatible transmitter suitable for operation in the
418, 434 and 868 MHz licence free ISM bands.
For applications where economy is paramount, the SX1240
may be used without the requirement for configuration via
an MCU. The transmitter is configured for default operation
at a frequency of 433.92 MHz or 868.3 MHz. However, in
conjunction with a microcontroller the communication link
parameters may be re-configured. Including, output power,
modulation format and operating channel.
The SX1240 offers integrated radio performance with cost
efficiency and is suited for worldwide operations in
particular Europe (ETSI EN 300-220-1), North America
(FCC part 15.231).
ORDERING INFORMATION
Part Number Temperature Range Qty. per Reel
SX1240ISTRT
-40 °C to +85 °C
2500
Package
SOIC8-EP
Pb-Free, Halogen Free, RoHS/WEEE compliant product.
APPLICATIONS
Low-Cost Consumer Electronic Applications
Remote Keyless Entry (RKE)
Remote Control / Security Systems
Audio Accessories
Process and building / home control
Active RFID
KEY PRODUCT FEATURES
+10 dBm or 0 dBm Configurable output power
Bit rates up to 100 kbps
FSK and OOK modulation
2 Preconfigured Modes for Operation without MCU
433.92 MHz OOK & 868.3 MHz FSK
1.8 to 3.7 V supply range
Low BOM Fully Integrated Txwww.DataSheet.co.kr
8 Selectable Centre Frequencies
Programmable Frequency Tuning of low cost XTAL
SX1240, Rev 1, Oct 2010
©2010 Semtech Corp.
Page 1
www.semtech.com
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
ADVANCED COMMUNICATIONS & SENSING
SX1240
Integrated Transmitter IC
DATASHEET
2. Electrical Characteristics
2.1. ESD Notice
The SX1240 is a high performance radio frequency device, and satisfies Class 2 of the JEDEC
standard JESD22-A114-B (human body model) on all pins.
It should thus be handled with all necessary ESD precautions to avoid any permanent damage.
2.2. Absolute Maximum Ratings
Stresses above the values listed below may cause permanent device failure. Exposure to absolute maximum ratings for
extended periods may affect device reliability.
Table 2 Absolute Maximum Ratings
Symbol
VDDmr
Tmr
Tjunc
Tstor
Supply Voltage
Temperature
Junction Temperature
Storage Temperature
Description
www.DataSheet.co.kr
Min Max Unit
-0.5 3.9 V
-55
+115
°C
-55
+125
°C
-55 150 ° C
2.3. Operating Range
Operating ranges define the limits for functional operation and the parametric characteristics of the device as described in
this section. Functionality outside these limits is not implied.
Table 3 Operating Range
Symbol
VDDop
Top
Clop
Description
Supply voltage
Operational temperature range
Load capacitance on digital ports
Min Max Unit
1.8 3.7 V
-40 85 ° C
- 25 pF
SX1240, Rev 1, Oct 2010
©2010 Semtech Corp.
Page 5
www.semtech.com
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
ADVANCED COMMUNICATIONS & SENSING
SX1240
Integrated Transmitter IC
DATASHEET
When powering up the circuit (microcontroller and SX1240), the logic level of the CTRL pin is sampled after T_START, as
described on Figure 3. During T_START, the microcontroller IO driving the CTRL pin must be configured as an output,
driving the CTRL pin to the desired state.
Note
whilst the logic level of CTRL pin during T_START (initialization phase of the microcontroller) does not have any
effect on the device operation, the pin should not be connected to VDD through an impedance lower than 20 k
ohms or higher than 1 M ohms.
www.DataSheet.co.kr
Figure 7. Power-up Timing
3.2.2. Transmitter Operation in Advanced Mode
When operating in advanced mode two possibilities exist for operation of the transmitter, these are dependent upon the
state of the Tx Mode bit (D12 of the register description in Table 8).
Tx Mode = ‘0’
When set to logical ‘0’ operation is identical to that of the Power & Go mode, following completion of the programming
phase, the SX1240 will be placed in transmit mode upon the next rising edge detected on the DATA pin. Transmit operation
will then be in accordance with that of Figure 4 with the time TOFFT corresponding to that programmed.
Note that prior to programming the default, logical ‘0’, configuration is loaded. Note also that subsequent programming
iterations can only be performed once the transmit cycle is finished - including the time required for switching off the PA
(TOFFT).
Tx Mode = ‘1’
With Tx Mode (D12) set to ‘1’ during the register programming cycle detailed in Figure 5, the SX1240 is placed directly in
transmit mode. It will then remain in transmit mode until a second TWI register write operation where, if reset to logical ‘0’,
the SX1240 returns to sleep mode. An illustration of this operation is shown in the following timing diagram.
Please also note that once in sleep mode, subsequent activity on the DATA pin (without clocking of the CTRL line) will
trigger transmission in accordance with Figure 4. Care must hence be taken to avoid inadvertent transmission due to such
activity.
SX1240, Rev 1, Oct 2010
©2010 Semtech Corp.
Page 11
www.semtech.com
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet SX1240.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| SX1240 | Low Cost Integrated Transmitter IC | Semtech |
| SX1242 | Low Cost Integrated Transmitter IC | Semtech |
| SX1243 | Low Cost Integrated Transmitter IC | Semtech |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |