Lime Microsystems LMS7002M

LMS7002M is a fully integrated, multi-band, multi-standard RF transceiver that is highly programmable. It combines Low Noise Amplifiers (RXLNA), TX Power Amplifier Drivers (TXPAD), receiver/transmitter (RX/TX) mixers, RX/TX filters, synthesizers, RX gain control, TX power control, the analog-to-digital and digital-to-analog convertors (ADC/DACs) and has been designed to require very few external components. The chip contains two transmit and two receive chains for achieving a Multiple In Multiple Out (MIMO) platform. Both transmitters share one PLL and both receivers share another. Transmit and receive chains are all implemented as zero Intermediate Frequency (zero IF or ZIF) architectures providing up to 160MHz RF modulation bandwidths (equivalent to 80MHz baseband IQ bandwidth). On the transmit side, In-phase and Quadrature IQ DAC data samples, from the base band processor, are provided to the LMS7002M via the LimeLight digital IQ interface. The IQ samples are pre - processed by the digital Transceiver Signal Processor (TSP) and applied to the on - chip transmit DACs. The DACs generate analog IQ signals which are further processed in the analog/RF section. Transmit low pass filters (TXLPF) remove images and noise. The analog IQ signals are mixed with the transmit PLL (TXPLL) output to produce a modulated RF signal, which is amplified by power amplifier drivers and provided as RF output. The LMS7002M provides an RF loop back option for calibration and test purposes. There are also an analog base band (BB) loop back and a digital loop back (DLB). On the receive side, three separate inputs with dedicated LNAs are provided. Each port RF signal is amplified by a programmable low noise amplifier (RXLNA), mixed with the receive PLL (RXPLL) output to down - convert to baseband. AGC steps can be implemented by a BB trans - impedance amplifier (RXTIA) before the programmable bandwidth low pass channel select / anti - alias filters (RXLPF). The received IQ signal is amplified by a programmable gain amplifier RXPGA. DC offset is applied at the input of RXTIA. The analog receive IQ signals are converted into the digital domain with on - chip receive ADCs. After ADCs, signal conditioning is performed by the digital Transceiver Signal Processor (TSP) and the signals are provided to the BB via the LimeLight digital IQ interface. The analog receive signals can be provided off - chip at RXOUTI and RXOUTQ pins by closing the RXOUT switch. A similar option is also available on the TX side.

• Field Programmable Radio Frequency (FPRF) chip
• Dual transceiver ideal for MIMO
• User programmable on the fly
• Continuous coverage of the 100 kHz - 3.8 GHz RF frequency range
• Digital interface to baseband with on - chip integrated 12 bit D/A and △/D converters
• Programmable RF modulation bandwidth up to 160 MHz using analog interface
• Programmable RF modulation bandwidth up to 60 MHz using digital interface
• Supports both TDD and full duplex FDD
• LimeLight digital IQ interface – JEDEC JESD207 TDD and FDD compliant
• Transceiver Signal Processor block employs advanced techniques for enhanced performance
• Single chip supports 2x2 MIMO. Multiple chips can be used to implement higher order MIMO
• On - chip RF calibration circuitry
• Fully differential baseband signals, analog IQ
• Few external components
• Low voltage operation, 1.25, 1.4 and 1.8V. Integrated LDOs to run on a single 1.8V supply voltage
• On - chip integrated microcontroller for simplified calibration, tuning and control
• Integrated clock PLL for flexible clock generation and distribution
• User definable analog and digital filters for customised filtering
• RF and base band Received Signal Strength Indicator (RSSI)
• 261 pin aQFN 11.5x11.5 mm package
• Power down option
• Serial port interface
• Low power consumption, typical 880 mW in full 2x2 MIMO mode, 550 mW in SISO mode using external LDOs
• Multiple bypass modes for greater flexibility

• Broad band wireless communications
• GSM, CDMA2000, TD - SCDMA, WCDMA/HSPA, LTE IEEE radios
• WiFi operating in the Whitespace frequencies
• Software Defined Radio (SDR)
• Cognitive Radio
• Unmanned Aerial Vehicle (UAV)
• Other Whitespace applications