LPR2430ER 2.4 GHz Spread Spectrum Transceiver Module Small Size, Light Weight, +18 dbm Transmitter Power

Transcription

1 RFM products are now Murata Products LPR430R.4 Hz Spread Spectrum ransceiver Module Small Size, Light Weight, +8 m ransmitter Power F, anadian I and SI ertified for nlicensed peration he LPR430R.4 Hz transceiver module is a low cost, high-power solution for peer-to-peer, point-to-point and point-to-multipoint wireless designs. LPR430R modules provide the flexibility and versatility to serve applications ranging from cable replacements to sensor networks. Based on the I wireless standard, the LPR430R module is easy to integrate and provides robust wireless communications in applications where full mesh network operation is not required. he LPR430R includes L V.0 etwork Layer firmware which features a flexible and simple-to-use Application Programming Interface. All Input/utput Pins I LPR430R Absolute Maximum Ratings Rating Value -0.3 to +3.6 on-perating Ambient emperature Range LPR430R lectrical haracteristics -40 to +85 haracteristic perating Frequency Range perating Frequency olerance Minimum Shown with Shield Removed ypical Maximum nits 475 MHz 300 khz irect Sequence -QPSK 5 50 RF ata ransmission Rate otes V o -300 umber of RF hannels Sym nits 405 Spread Spectrum Method Modulation ype High Power Module Sleep urrent less than 3 µa Symbol Rate olerance kb/s 0 5 MHz Receiver Sensitivity, 0-5 BR -95 m pper Adjacent hannel Rejection, +5 MHz 4 Lower Adjacent hannel Rejection, -5 MHz 30 pper Alternate hannel Rejection, +0 MHz 55 Lower Alternate hannel Rejection, -0 MHz 53 Maximum RF ransmit Power 8 RF hannel Spacing ppm ransmit Power Adjustment ptimum Antenna Impedance by Murata lectronics.a., Inc. LPR430R 0/4/6 m 0 50 of 6 W

2 LPR430R lectrical haracteristics haracteristic Sym otes Minimum ypical Maximum nits A Input Range V A Input Resolution bits A Input Impedance 55 M PWM utput Resolution* 8 6 bits AR Baud Rate igital :.,.4, 4.8, 9.6 (default), 9., 8.8, 38.4, 57.6, 76.8, 5. Logic Low Input Level V Logic High Input Level V Logic Input Internal Pull-up Resistor 0 K PI3 Logic Low Sink urrent 0 ma Power Supply Voltage Range V Vdc Power Supply Voltage Ripple 0 mv P-P Receive Mode urrent 33 ma ransmit Mode urrent 30 ma Sleep Mode urrent 3 µa perating emperature Range *PWM0 has 8-bit resolution, PWM has 6-bit resolution. Built-in PWM output filters suppress ripple to 7 bits. Additional filtering can be added externally. I kb/s o AI: lectrostatic Sensitive evice. bserve precautions when handling by Murata lectronics.a., Inc. LPR430R 0/4/6 of 6

3 L 3.7 A IV I Y k H z B lo c k ia g r a m V 3 M H z L I K S w i c h 3 I 0 (A _ F ) W A I _ X 8 X /H S _ S ( S ( ) I ) 8 9 W M 0 I ( I I 3 ( W M ( 8 0 a d M ic r o c 7 W M ) F il e r io a n d o n r o lle r 8 I ) 3 F il e r V e g F il e r 9 F I 0 _ ) / 3 0 S / V 7 A _ V 3 S V A S V 0 S V 9 S V / S 8 A 0 7 A I /H S _ I X / X o m b in e r A I _ Figure LPR430R Hardware LPR430R Firmware he major hardware component of the LPR430R is the 430 I compatible transceiver with integrated 805 microcontroller. he LPR430R operates in the frequency band of 405 to 475 MHz at a nominal output power of 63 mw. he LPR430R includes a low noise preamplifier in the receiver path and a power amplifier in the transmitter path, greatly increasing the operating range of the 430. wo crystals are provided to operate the 430, a 3 MHz crystal for normal operation and a khz crystal for precision sleep mode operation. he LPR430R provides a variety of application hardware interfaces including a AR interface, three -bit A inputs, two PWM (A) outputs, and six general purpose digital ports by Murata lectronics.a., Inc. LPR430R 0/4/6 he main firmware components in the LPR430R include the Media Access ontrol (MA) layer and the L V.0 etworking Layer. L V.0 supports up to 63 remotes. etwork topologies include point-to-point, point-to-multipoint and peer-to-peer. L employs one-hop relay forwarding to mitigate network transmission problems such as multipath fading. L includes provisions for low-power sleep mode operation with periodic wakeup and report. he L Application Programming Interface (API) provides an easy-to-use, flexible set of application commands and functions. he API includes support for send/receive serial data, read/write PI, read A inputs, write PWM outputs and module configuration services. In addition, L supports analog and digital binding, which maps an A measurement and the states of two digital inputs on one LPR430R to a PWM output and two digital outputs on another LPR430R. See the LPR430 Series Integration uide for complete details of the L API. 3 of 6

4 LPR430R Pad escriptions Pin ame escription - Power supply and signal ground. onnect to the host circuit board ground. AIVIY RF activity indicator. utput pulses high when a packet is sent or received. 3 LIK Link indicator. utput is high when the radio has successfully joined a network. 4 PI0 (A_RF) onfigurable digital port 0. When configured as an output, the power-on state is also configurable. his pin can also be configured as a reference voltage input for the As, 0 to 3.3 V,.5 V typical. 5 RAI_X Serial data output (AR) from the radio to the host. 6 RAI_RX I Serial data input (AR) from the host to the radio. 7 8 PI4 (/HS_S ) PI5 (/HS_RS) onfigurable digital port 4. When configured as an output, the power-on state is also configurable. Also configurable as AR flow control output. he LPR430 sets this line low to indicate it is ready to accept data from the host on the RAI_RX input. When the LPR430 sets this line high, the host must stop sending data. he default state is PI4. onfigurable digital port 5. When configured as an output, the power-on state is also configurable. Also configurable as AR flow control input. he host sets this line low to allow data to flow from the RAI_X pin. When the host sets this line high, the LPR430 will stop sending data to the host. he default state is PI5. 9 PWM0 Pulse-width modulated output 0 with internal low-pass filter. Provides a A function, 0 to 3.3 V. 0 PI (PWM) onfigurable digital port. When configured as an output, the power-on state is also configurable. his pin is connected to the input of the low-pass filter driving Pin 3, and is also configurable as a PWM output. PI onfigurable digital port. When configured as an output, the power-on state is also configurable. 3 PI3 (RS485_) PWM (PI) onfigurable digital port 3. When configured as an output, this high current port can sink up to 0 ma. he power-on output state is also configurable. an also be configured as active low transmit enable for controlling an RS485 or other half-duplex bus driver. PI (Pin 0) drives this pin through a low-pass filter. Provides a A function when PI is configured as a PWM output. 4 V I Power supply input, +3.3 to +5.5 Vdc. 5 - Power supply and signal grounds. onnect to the host circuit board ground. 6 - Power supply and signal grounds. onnect to the host circuit board ground. 7 /RS I 8 A0 I Active low module hardware reset. Hold this input low when the power supply input is less than 3.3 Vdc. he module firmware boots up and will accept commands about 3 seconds after this input goes high. -bit A input 0. A full scale reading can be referenced to the module s +3.3 V regulated supply, the A s internal +.5 V reference, or A_RF (Pin 4). 9 A I A input. Same configuration options as A0. 0 RSV - Reserved pin. Leave unconnected. RSV - Reserved pin. Leave unconnected. RSV - Reserved pin. Leave unconnected. 3 RSV - Reserved pin. Leave unconnected. I 4 A I A input. Same configuration options as A0. 5 A_V Module s +3.3 V regulated supply, used for ratiometric A readings. urrent drain should be less than 5 ma. 6 - o connection. 7 - o connection. 8 - RF ground. onnect to the host circuit board ground plane, and to shield when using coaxial cable. 9 RFI RF port. onnect the antenna to this port with a 50 stripline or semi-rigid coaxial cable RF ground. onnect to the host circuit board ground plane, and to shield when using coaxial cable by Murata lectronics.a., Inc. LPR430R 0/4/6 4 of 6

5 L 3 0 u lin e a n d M o u n in g im e n s io n s o p V ie w I 6 im e n s io n s in in c h e s Figure RFI Stripline he RFI pad on the radio module is connected directly to an antenna on the host circuit board, or to an MMX or similar RF connector. It is important that this connection be implemented as a 50 ohm stripline. Referring to Figure 3, the width of this stripline depends on the thickness of the circuit board between the stripline and the groundplane. For FR-4 type circuit board materials (dielectric constant of 4.7), the width of the stripline is equal to.75 times the thickness of the circuit board. ote that other circuit board traces should be spaced away from the stripline to prevent signal coupling, as shown in Figure 4. he stripline trace should be kept short to minimize its insertion loss. r ip lin e r a c e e a il o p p e r S r ip lin e ra c e ir c u i B o a r d S o p p e r ro u n d la n e F B M a e r ia l F o r 0 o h m im p e d a n c e W =.7 race Separation from 50 hm Microstrip Length of race Run Parallel to Microstrip 00 mil 5 mil 50 mil 00 mil 00 mil 90 mil 50 mil 450 mil 300 mil 650 mil * H Figure by Murata lectronics.a., Inc. LPR430R 0/4/6 Figure 4 5 of 6

6 Reflow Profile I An example solder reflow profile for mounting the radio module on its host circuit board is shown in Figure 5. Figure 5 ote: Specifications subject to change without notice by Murata lectronics.a., Inc. LPR430R 0/4/6 6 of 6