nRF904 Nordic VLSI, nRF904 Datasheet

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nRF904

Manufacturer Part Number
nRF904
Description
RF Transmitter 902-928MHz
Manufacturer
Nordic VLSI
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
NRF904
Manufacturer:
NORDLC
Quantity:
20 000
PRODUCT SPECIFICATION
Single chip 915 MHz Transmitter
nRF904 is a single-chip transmitter for the 902-928 MHz band. It is compliant with
the US Federal Communications Commission (FCC) standard CFR47 chapter 15. The
transmitter consists of a fully integrated frequency synthesiser, a power amplifier, a
crystal oscillator and a modulator. 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 and frequency deviation is easily
programmable by use of external resistors. Current consumption is very low, only 9
mA at an output power of –10dBm. Built-in Clock and Power Down modes makes
power saving easily realisable.
Supply voltage
Maximum output power @ 400 , 3 V
Maximum FSK data rate
Supply current FSK transmitter @ -10dBm output power
Supply current in Clock mode
Supply current in Power Down mode
Revision: 2.1
Main office: Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone +4772898900 - Fax +4772898989
True single chip FSK transmitter in a
small 8-pin package
Adjustable output power up to +1dBm
FSK data rate up to 50kbits/s
Controllable modulation deviation
Very few external components
Improved frequency stability compared to
SAW solutions
Wide power supply range: 2.4 to 3.6 V
Low supply current, typical 9mA
@ -10dBm output power
Power Down and Clock modes makes
power saving easy
Reference Clock output pin for
microcontroller
nRF904 - EVKIT
nRF904 - IC
Table 2. nRF904 ordering information.
Table 1. nRF904 quick reference data.
Evaluation kit with nRF904 IC on board
Page 1 of 16
8 pin SOIC
Ã
Automatic Meter Reading
Keyless entry
Wireless data communication
Alarm and security systems
Home Automation
Remote control
Surveillance
Automotive
Telemetry
Toys
2.4 – 3.6
200
<10
50
1
9
kbit/s
dBm
mA
n
V
A
October 2001

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nRF904 Summary of contents

Page 1

... Reference Clock output pin for microcontroller nRF904 is a single-chip transmitter for the 902-928 MHz band compliant with the US Federal Communications Commission (FCC) standard CFR47 chapter 15. The transmitter consists of a fully integrated frequency synthesiser, a power amplifier, a crystal oscillator and a modulator. Due to the use of the crystal-oscillator stabilised frequency synthesiser, frequency drift is much lower than in comparable SAW- resonator based solutions ...

Page 2

... ANT1 Output 8 VSS Power Table 3. nRF904 pin functions. XTAL REXT XO8 VDD Figure 2. nRF904 pin assignment. Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 2 ...

Page 3

... The levels stated are supplied to a external series resistor in front of the DIN input pin 5) Output is an open collector. 6) Controllable with crystal parameters and external data filter. Table 4. nRF904 electrical specifications. Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 2 40º 85ºC ...

Page 4

... PRODUCT SPECIFICATION nRF904, uses the SOIC 8 package. Dimensions are in mm SOIC 8 4.80 3.81 4.98 3.99 Figure 3. nRF904 package outline. VDD............................... - 0. VSS ...................................................0V V ....................... - 0.3V to VDD + 0. ...................... - 0.3V to VDD + 0.3V O Electrostatic Sensitive Device Observe Precaution for handling. Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 2 ...

Page 5

... PRODUCT SPECIFICATION Table 5 provides an overview of the different modes that the nRF904 may be set to are the control nodes for resistors ( see Figure 4) and R1 R4 represent the voltage state needed to set a particular mode. Mode V R1 Power Down GND ...

Page 6

... MHz will result in an output clock frequency of 1.7874 MHz. The XO8 output is an open collector with an internal 30 k resistor. The internal XO8 series resistor has a typical value For a given value of the external resistor R3 the output voltage V 8 Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 2.1 R43 ...

Page 7

... The resistor R1 connected from the crystal pin towards VDD supplies the crystal oscillator with bias current (see Figure 4). When R1 is connected to ground, the chip enters Power Down mode. A typical value for R1 is 150 k . Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 2 ...

Page 8

... Transmit mode, Clk is Clock mode, Pwr_Dn is Power Down Mode.) Change of Mode Pwr_Dn Î TX Clk Î TX Table 6. Switching times for nRF904. The minimum time from Power Down mode until the synthesised frequency is stable and data can be transmitted is seen in Figure 6. XTAL is controlled by V VDD ...

Page 9

... Figure 8. ANT1 xxxxxx nRF904 ANT2 Figure 8. Connection of nRF904 to single ended antenna ( using a differential to single ended matching network. The inductors in Figure 8 need to have a Self-Resonance Frequency (SRF) above the carrier frequency (902-928MHz). Suitable 68nH inductors are listed in Table 7. Pulse http://www ...

Page 10

... Figure 9. Typical RF Frequency Deviation for varing values of R4. Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 2.1 PE-0603CD150GTT 0603CS-15NXGBC LQW1608A15NG00 0603G150GTE KQ0603TE15NG < 60 ohm (Guideline specification S#Ãbx‚u€d ...

Page 11

... Long power supply lines on the PCB should be avoided. All device grounds, VDD connections and VDD bypass capacitors must be connected as close as possible to the nRF904 IC. For a PCB with a topside RF ground plane, the VSS pins should be connected directly to the ground plane. For a PCB with a bottom ground plane, the best technique is to have via holes in or close to the VSS pads ...

Page 12

... XO8 C1 C2 33pF 4.7nF R5 3.9K DIN aaaaaaaa Figure 10. nRF904 application schematic. C1 NP0 ceramic chip capacitor, (REXT pin decoupling) C2 X7R ceramic chip capacitor, (REXT pin decoupling) C3 X7R ceramic chip capacitor, (Supply decoupling) C4 NP0 ceramic chip capacitor, (Supply decoupling) C5 NP0 ceramic chip capacitor, (Supply decoupling) ...

Page 13

... PRODUCT SPECIFICATION a) Top silk screen c) Top view Figure 11. PCB layout (example) for nRF904 with loop antenna. Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 2.1 b) Bottom silk screen d) Bottom view - Phone +4772898900 Qhtrà "Âsà Fax +4772898989 October 2001 ...

Page 14

... Nordic VLSI ASA for any damages resulting from such improper use or sale. Product specification: Revision Date: 30.10.2001. Datasheet order code: 301001-nRF904. All rights reserved ®. Reproduction in whole or in part is prohibited without the prior written permission of the copyright holder. ...

Page 15

... PRODUCT SPECIFICATION Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 2.1 - Phone +4772898900 Qhtrà $Âsà Fax +4772898989 October 2001 ...

Page 16

PRODUCT SPECIFICATION Vestre Rosten 81, N-7075 Tiller, Norway Phone: + 00, Fax: + Revision 2.1 Qhtrà %Âsà % October 2001 ...

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