Robust, reliable analog solutions Sub-GHz Low-Power Multi-Standard Wireless Platform OL2385 Low-Power Multi-Channel UHF Transceiver TARGET APPLICATIONS Smart grid NAN Smart metering Building and home automation Wireless sensor network Machine-to-machine communication Low-power wide area networking OVERVIEW The NXP® OL2385 radio frequency transceiver with embedded microcontroller is designed for a wide range of industrial and home applications requiring very high link budget for bi-directional RF communication. The embedded microcontroller in the OL2385 multi-standard sub-GHz transceiver enables the implementation of complete subsystem and lower layer driver functions. As a result, package pre-processing and time-critical ACK responses are simpler than the responses from standard transceiver devices fully controlled by a host MCU. The device is supplied with standard software stacks such as IEEE802.15.4, W-MBus Data Link Layer and SIGFOX. These software stacks are preprogrammed in the factory and are controlled by a system host microcontroller via APIs available through either UART or SPI. NXP’s Kinetis® microcontroller is supplied with a driver library and the Kinetis software development kit (SDK). The transmitter has a high dynamic range of -25 dBm to +14 dBm and efficient power ramping PA. The excellent phase noise of the transmitter conforms to ETSI, FCC and ARIB standards. Configured to operate with low active and standby power, the transceiver is ideal for battery-powered applications. FEATURES AND BENEFITS Blocking performance at 1 MHz: 58 dBm Key features Phase noise at 1 MHz 868 MHz: -127 dBc Single IC for bands (160–960 MHz) at 100 kHz 868 MHz: -110 dBc Ultra-low RX power below 11 mA Image Rejection: 60 dB Up to +14 dBm output power at 29 mA Antenna Diversity Sensitivity -128 dBm at 4 kHz Two RF inputs are available for the receiver and allow sequential antenna diversity to be performed, should one antenna show a better performance in a given environment or for a specific radio channel. TRXSWITCH_RX LNA Q1 The attenuation factor of these attenuators can be compensated in the digital domain, meaning that gain control can be implemented throughout data reception without the loss of any data bits. This strategy ensures system robustness in the case of multi-path fading or narrowband jammers. Link budget and system robustness are essential parameters for modern automotive RF systems, and the OL2385 transceiver is an industry benchmark in all respects: P21 P22 37 38 39 P23 TEST VDD_DIGL 40 Dem. Data Clock Bit Mixer Filter 35 DMA P17 Filter Recov. Proces. 34 Tx Encoder MSCL Power regulator α DMA 33 Internal Temperature Sensor 32 Interrupt controller DMA controller 7 MDI Timer0 MRK IIIe CPU Timer1 USART0 31 Main RC oscillator 10 Port wake-up logic General purpose ADC Timer3, RX timer EROM Crystal oscillator Watchdog PLL subsystem LO chain VCO Loop filter Lock Charge DIV 2 Fractional-N divider ÷ N÷M 11 27 P12 P13 VCO calibration 26 21 20 GND_DIG VDD_3VOUT 19 18 VDD_LO 17 16 XTAL_P 28 P14 5V Voltage regulator GND_LO 14 13 15 GND_XO XTAL_N VDD_XO 12 P11 Polling timer detect pump VDD_PA 29 System Timer0 PFD P10 RAM Power & system control 9 Bitmanipulation registers 22 GND_PA Port control VDD_5VIN 8 VDD_IO Timer2 Memory management unit ROM TXOUT 30 SPI UART LIN Clock generation GND_PA_RF RST_N CRC coprocessor USART1 24 6 SPI UART LIN TRXSWITCH_TX 23 5 MSDA 25 P15 P16 GND_RF 4 Tx Modulator VDD_DIG TRXSWITCH_ANT Power Amplifier A LEADER IN ANALOG SOLUTIONS: Expanding on more than 30 years of innovation, our company is a leading provider of high-performance products that use SMARTMOS® technology, combining digital, power and standard analog functions. NXP supplies analog and power management ICs that are advancing the automotive, consumer, industrial and networking markets. Analog solutions interface with real-world signals to control and drive for complete embedded systems. RF front end noise figure: 5 dB FSK sensitivity: -12 -128 dBm www.nxp.com and imxcommunity.org NXP, the NXP logo, Kinetis and SMARTMOS are trademarks of NXP B.V. All other product or service names are the property of their respective owners. © 2016 NXP B.V. Document Number: OL2385LWPWRLF REV 0 Filter α ADC IQADC VCO P20 Digital receiver chain RadioTx GND_RF VREGPA The use of attenuators make advanced gain control possible. The gain of the ‘active’ elements within the receive path, e.g., LNA, Mixer, etc., remains fixed. Control of the gain is achieved by switching attenuators before and after the LNA. The gain switch is then immediate and predictable, requiring no settling time. 41 ADC Low power RC oscillator RF Front End GND_DIG GND_ADC 43 IFP_DCBUS 44 Sigma-delta GND_LO Minimum image rejection of 50 dB is guaranteed over temperature and supply. Using an NXP-patented onboard generated pilot tone calibration technique in combination with an onboard temperature sensor, calibration values are stored in a look-up table, ensuring optimum settling time. TIA 3 Switch Image Rejection Zero IF 36 Mixer I1 2 TRX FEATURE HIGHLIGHTS Decim. IQcal 1 RF frontend GND_RF 42 RF_IN_B 45 48 Operating temperature range: -40 °C to +85 °C RF_IN_A HVQFN48 package (7 x 7 mm²) IFN_SENSE_IN OL2385SIMPLIFIED SIMPLIFIEDBLOCK BLOCKDIAGRAM DIAGRAM OL2385 VDD_ADC 400 kbit/s 4(G)FSK, 200 kbit/s 2(G)FSK, ASK, OOK 46 WMBus2013, KNX, 802.15.4, T108, sub-GHz ZigBee®, SigFox VDD_RF Supported software standards: 47 Excellent phase noise