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PDF nRF902 Data sheet ( Hoja de datos )
| Número de pieza | nRF902 | |
| Descripción | Single chip 868 MHz Transmitter | |
| Fabricantes | Nordic | |
| Logotipo |  |
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PRELIMINARY PRODUCT SPECIFICATION
Single chip 868 MHz Transmitter
nRF902
FEATURES
APPLICATIONS
• True single chip FSK/ASK transmitter in • Automatic Meter Reading
a small 8-pin package
• Keyless entry
• Adjustable output power up to +10dBm • Wireless data communication
• FSK data rate up to 50kbits/s
• Alarm and security systems
• Very few external components
• Home Automation
• On-chip frequency synthesiser gives
• Remote control
improved frequency stability compared to • Surveillance
SAW solutions
• Automotive
• Wide power supply range: 2.4 to 3.6 V • Telemetry
• Low supply current, typical 9mA
• Toys
@ -10dBm output power
• Power Down and Clock modes makes
power saving easy
• Reference Clock output pin for
microcontroller
GENERAL DESCRIPTION
nRF902 is a single-chip transmitter for the 868 MHz ISM band, designed to comply
with the ETSI specification I-ETS 300 220. Using nRF902 both FSK and ASK
modulation is possible. The transmitter consists of a fully integrated frequency
synthesiser, a power amplifier, a crystal oscillator and a modulator. Few external
components are required: a 13.567 MHz crystal, two resistors and some decoupling
capacitors. Due to the use of the crystal-oscillator stabilised frequency synthesiser,
frequency drift is much lower than in comparable SAW-resonator based solutions.
Output power is easily programmable by use of an external resistor. Current
consumption is very low, only 9 mA at an output power of –10dBm. Built-in Clock
and Power Down modes makes power saving and duty-cycling easily realisable.
QUICK REFERENCE DATA
Parameter
Value
Minimum supply voltage
Maximum output power
2.4
10
Maximum FSK data rate
Maximum ASK data rate
Supply current FSK transmitter @ -10dBm output power
Supply current in Clock mode
50
10
9
200
Supply current in Power Down mode
<10
Table 1. nRF902 quick reference data
Unit
V
dBm
kbit/s
kbit/s
mA
µA
nΑ
Main office: Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone +4772898900 - Fax +4772898989
Revision: 1.0
Page 1 of 13
April 2000
1 page  
PRELIMINARY PRODUCT SPECIFICATION
nRF902 Single chip 868 MHz Transmitter
IMPORTANT TIMING DATA
Timing information
The timing information for the different operations is summarised in Table 4.
(TX is Transmit mode, Clk is Clock mode, Pwr_Dn is Power Down Mode.)
Change of Mode
Pwr_Dn è TX
Clk è TX
Max Delay
2ms
30us
Table 4 Switching times for nRF902
Switching between Power Down Mode and Transmit-mode.
The maximum time from Power Down mode until the synthesised frequency is stable
and data can be transmitted is seen in Figure 4.
VDD
xtal
FSK
2ms
024
ms
Figure 4. Timing diagram when going from Power Down mode to Transmit-mode
Switching between Clock Mode and Transmit-mode.
The maximum time from Clock mode until the synthesised frequency is stable and
data can be transmitted is seen in Figure 5.
VDD
REXT
FSK
30us
0 30
us
Figure 5. Timing diagram when going from Clock mode to Transmit-mode
Nordic VLSI ASA
Revision: 1.0
- Vestre Rosten 81, N-7075 Tiller, Norway - Phone +4772898900 - Fax +4772898989
Page 5 of 13
April 2000
5 Page 
PRELIMINARY PRODUCT SPECIFICATION
nRF902 Single chip 868 MHz Transmitter
DEFINITIONS
Data sheet status
Objective product specification This datasheet contains target specifications for product development.
Preliminary product
specification
Product specification
This datasheet contains preliminary data; supplementary data may be
published from Nordic VLSI ASA later.
This datasheet contains final product specifications. Nordic VLSI ASA
reserves the right to make changes at any time without notice in order to
improve design and supply the best possible product.
Limiting values
Stress above one or more of the limiting values may cause permanent damage to the device. These are stress
ratings only and operation of the device at these or at any other conditions above those given in the
Specifications sections of the specification is not implied. Exposure to limiting values for extended periods may
affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
Table 6. Definitions.
Nordic VLSI ASA reserves the right to make changes without further notice to the
product to improve reliability, function or design. Nordic VLSI does not assume any
liability arising out of the application or use of any product or circuits described
herein.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems
where malfunction of these products can reasonably be expected to result in personal
injury. Nordic VLSI ASA customers using or selling these products for use in such
applications do so at their own risk and agree to fully indemnify Nordic VLSI ASA
for any damages resulting from such improper use or sale.
Preliminary specification: Revision Date: 06/04/2000.
Datasheet order code: 060400-nRF902.
All rights reserved ®. Reproduction in whole or in part is prohibited without the prior
written permission of the copyright holder.
Nordic VLSI ASA
Revision: 1.0
- Vestre Rosten 81, N-7075 Tiller, Norway - Phone +4772898900 - Fax +4772898989
Page 11 of 13
April 2000
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet nRF902.PDF ] | |
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