NRF0433

PRODUCT SPECIFICATION Single chip 433MHz RF Transceiver FEATURES • • • • • • True single chip FSK transceiver On chip UHF synthesiser, 4MHz crystal reference 433MHz ISM band operation Few external components required Up to 10mW transmit power No setup/configuration RF0433 APPLICATIONS • • • • • • • • Alarm and Security Systems Home Automation Remote Control Surveillance Automotive Telemetry Toys Wireless Communication GENERAL DESCRIPTION nRF0433 is a true single chip UHF transceiver designed to operate in the 433MHz ISM (Industrial, Scientific and Medical) frequency band. It features Frequency Shift Keying (FSK) modulation and demodulation capability. nRF0433 operates at bit rates up to 9600 bit/s. Transmit power can be adjusted to a maximum of 10dBm. It features a differential antenna interface and an internal transmit/receive switch. nRF0433 operates from a single +5V DC supply. As a primary application, nRF0433 is intended for design of UHF transceivers in compliance with the European Telecommunication Standard Institute (ETSI) specification EN 300 220-1 V1.2.1. QUICK REFERENCE DATA Parameter Frequency Modulation Frequency deviation Max. RF output power @ 400Ω Sensitivity @ 400Ω, BR=1200 bps, BER 45 @ 433 MHz, with a maximum tolerance of ± 3%, see table 6. See also page 9 for PCB layout guidelines. Vendors Predan Pulse Coilcraft muRata WWW address http://www.predan.com http://www.pulseeng.com http://www.coilcraft.com http://www.murata.com Part. no., 22 nH inductors, 0805 CS0805-220G PE-0805CD220GTT PE-0805CM220GTT 0805CS-220XGBC 0805HT-22NTGBC LQW1608A22NG00 Table 6. Vendors and part. no. for suitable 22nH inductors. Transmit/receive mode selection TXEN is a digital input for selection of transmit or receive mode. TXEN = “1” selects transmit mode. TXEN = “0” selects receive mode. DIN (data input) and DOUT (data output) The DIN pin is the input to the digital modulator of the transmitter. The input signal to this pin should be standard CMOS logic level at data rates up to 9600 bit/s. The demodulated digital output data appear at the DOUT pin at standard CMOS logic levels. f0 + ∆f → “1”, f0 - ∆f → “0”. Frequency difference between transmitter and receiver For optimum performance, the total frequency difference between transmitter and receiver should not exceed 70 ppm (30 kHz). This yields a crystal stability requirement Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 3.2 Page 8 of 14 Phone +4772898900 - Fax +4772898989 February 2000 PRODUCT SPECIFICATION nRF0433 Single chip RF Transceiver of +/- 35 ppm for the transmitter and receiver. Additional frequency difference will result in a -12dB/octave drop in receiver sensitivity. The functional window of the transmission link is typically 450 ppm (200 kHz). Example: A crystal with +/- 20 ppm frequency tolerance and +/- 25 ppm frequency stability over temperature (-25C to +75C) has a worst case frequency difference of 45 ppm. If the transmitter and receiver operate in different temperature environments, the resulting worst-case frequency difference may be as high as 90 ppm. Resulting drop in sensitivity due to the extra 20 ppm, is then approx. 5dB. PCB layout and decoupling guidelines A well-designed PCB is necessary to achieve good RF performance. A PCB with a minimum of two layers inclusive a ground plane is recommended for optimum performance. The nRF0433 +5V DC supply voltage should be decoupled as close as possible to the VDD pins with a high performance RF capacitor (e.g. 100 pF ceramic). It is preferable to mount a large surface mount capacitor (e.g. 2.2 µF ceramic) in parallel with the smaller value capacitors. The nRF0433 supply voltage should be filtered separately from the supply voltages of any digital circuitry. 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 IC package. 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 to connect the VSS pins to ground, is to have via holes in, or close to the VSS pad. Full swing digital data or control signals should not be routed close to the PLL loop filter and the external VCO inductor. The VCO inductor placement is important. The optimum placement of the VCO inductor gives a PLL loop filter voltage of 1.25 +/- 0.5 V. For a 0805 size inductor the length between the centre of the VCO1(2) pad and the centre of the inductor pad should be 2.5 mm, see figure 8 (layout, top view). PCB layout example Figure 8 shows a PCB layout example for the application schematic in Figure 7. A double-sided FR-4 board of 1.6mm thickness is used. This PCB has a continuous ground plane on the bottom layer. Additionally, there are ground areas on the component side of the board to ensure sufficient grounding of critical components. A large number of via holes connect the top layer ground areas to the bottom layer ground plane. There is no ground plane behind the antenna. For more layout information, please refer to application note nAN400-04, “nRF0433 RF and antenna layout”. Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 3.2 Page 9 of 14 Phone +4772898900 - Fax +4772898989 February 2000 PRODUCT SPECIFICATION nRF0433 Single chip RF Transceiver APPLICATION SCHEMATIC +5V R2 C5 2.2uF 1M C3 22pF X1 4.000 MHz C4 22pF R3 1M REFERENCE U1 1 2 3 4 5 6 7 8 9 10 XC1 VDD FILT2 FILT1 VCO1 VCO2 VSS VDD DIN DOUT XC2 TXEN VDD VSS ANT1 ANT2 VSS VDD VSS RF_PWR 20 19 18 17 16 15 14 13 12 11 C10 1.2pF R4 330K aaaaaaaa C9 100pF C11 1.2pF C2 5.6nF L1 22nH R1 27K C6 100pF C7 100pF C1 270pF nRF0433 Single chip 433MHz RF Transceiver C8 100pF J1 Loop antenna 30x50mm Q=50 PLL FILTER DOUT DIN TXEN Figure 7. nRF0433 application Schematic. Component C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 L1 Description NP0 ceramic chip capacitor, (PLL loop filter) X7R ceramic chip capacitor, (PLL loop filter) NP0 ceramic chip capacitor, (Crystal oscillator) NP0 ceramic chip capacitor, (Crystal oscillator) X7R ceramic chip capacitor, (Supply decoupling) NP0 ceramic chip capacitor, (Supply decoupling) NP0 ceramic chip capacitor, (Supply decoupling) NP0 ceramic chip capacitor, (Supply decoupling) NP0 ceramic chip capacitor, (Supply decoupling) NP0 ceramic chip capacitor, (Antenna tuning)* NP0 ceramic chip capacitor, (Antenna tuning)* VCO inductor, tolerance ±3%, Q>45 @ 433 MHz Recommended inductor part.no.: Predan: Pulse: Part.no.: CS0805-220G Part.no.: PE-0805CD220GTT Part.no.: PE-0805CM220GTT Coilcraft: Part.no.: 0805CS-220XGBC Part.no.: 0805HT-22NTGBC muRata: Part.no.: LQW1608A22NG00 Value 270 5.6 22 22 2.2 100 100 100 100 1.2±0.1 1.2±0.1 22 Units pF nF pF pF µF pF pF pF pF pF pF nH R1 R2 R3 R4 X1 1/8W chip resistor, (PLL loop filter) 1/8W chip resistor, (Crystal oscillator) 1/8W chip resistor, (Transmitter power setting) 1/8W chip resistor, (Antenna Q reduction) Crystal 27 1 1 330 4.000 kΩ MΩ MΩ kΩ MHz Table 7. Recommended External Components. * Capacitors with larger tolerance than specified will result in de-tuning of the antenna and reduced communication distance. Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 3.2 Page 10 of 14 Phone +4772898900 - Fax +4772898989 February 2000 PRODUCT SPECIFICATION nRF0433 Single chip RF Transceiver Top silk screen Bottom silk screen Top view Bottom view Figure 8. PCB layout (example) for nRF0433 with loop antenna (not actual size). Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 3.2 Page 11 of 14 Phone +4772898900 - Fax +4772898989 February 2000 PRODUCT SPECIFICATION nRF0433 Single chip RF Transceiver DEFINITIONS Data sheet status Objective product specification Preliminary product specification Product specification This datasheet contains target specifications for product development. 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 8. 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. Product specification: Revision Date: 29.02.2000. Datasheet order code: 290200-nRF0433. All rights reserved ®. Reproduction in whole or in part is prohibited without the prior written permission of the copyright holder. Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 3.2 Page 12 of 14 Phone +4772898900 - Fax +4772898989 February 2000 PRODUCT SPECIFICATION nRF0433 Single chip RF Transceiver YOUR NOTES Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway Revision: 3.2 Page 13 of 14 Phone +4772898900 - Fax +4772898989 February 2000 PRODUCT SPECIFICATION nRF0433 Single chip RF Transceiver Nordic VLSI - World Wide Distributors For Your nearest dealer, please see http://www.nvlsi.no Main Office: Vestre Rosten 81, N-7075 Tiller, Norway Phone: +47 72 89 89 00, Fax: +47 72 89 89 89 E-mail: nRF@nvlsi.no Visit the Nordic VLSI ASA website at http://www.nvlsi.no Revision: 3.2 Page 14 of 14 February 2000