nRF904 Nordic VLSI, nRF904 Datasheet
nRF904
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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 ...
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... 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 ...
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... 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 ...
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... 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 ...
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... 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 ...
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... 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 ...
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... 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 ...
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... 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 ...
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... 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 ...
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... 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#Ãbxud ...
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... 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 ...
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... 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) ...
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... 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 "Ãsà Fax +4772898989 October 2001 ...
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... 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. ...
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... PRODUCT SPECIFICATION Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 2.1 - Phone +4772898900 Qhtrà $Ãsà Fax +4772898989 October 2001 ...
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PRODUCT SPECIFICATION Vestre Rosten 81, N-7075 Tiller, Norway Phone: + 00, Fax: + Revision 2.1 Qhtrà %Ãsà % October 2001 ...