Field programmable RF ICs: LMS7002M
The LMS7002M is Lime’s second-generation field programmable RF (FPRF) transceiver IC with extended functionality to cover a greater range of frequencies and applications.
The device uses state of the art transceiver design in CMOS technology to significantly reduce cost and power consumption. It integrates a dual transceiver architecture to support 2×2 MIMO along with on-chip digital signal processing functions. The LMS7002M can run on any mobile communications and wireless standard – including all 2G, 3G and 4G variants and WiFi – both licensed and unlicensed.
The LMS7002M is ideal for a wide range of consumer and professional applications, including:
Small cell communications equipment
M2M networks
Broadband wireless
Netbooks and tablet PCs
Test equipment
Open source radio
Cognitive radio
Lime’s proven FPRF technology has been used by private companies, government and military organisations to create a myriad of wireless broadband technologies, from whitespace radios to disaster relief networks to communications infrastructure devices.
Highlights
Configurability
The LMS7002M has a continuous operation spectrum of 100khz to 3.8GHz, and is software configured to operate up to 120MHz RF bandwidth.
The device can be configured to use the 2G, 3G and 4G standards – including all TDD / FDD variants – and a host of additional standards, including WiFi.
Single chip MIMO (2×2)
To enable advanced networks to be created, the chip features a dual transceiver architecture. It integrates 12-bit ADCs and DACs, LNAs, filters and mixers to provide two transmit and receive paths, enabling a true single-chip (2×2) MIMO operation. The transceiver’s enhanced capability features, such as an on-chip microcontroller, further simplify its calibration and installation. Furthermore, its extensive on-chip DSP has been programmed to enhance functionality and performance.
The device is fabricated using a low cost CMOS process and has been designed for the lowest possible power consumption.
The DSP supplements the analogue gain with digital control and is an important factor in reducing the overall power consumption. This allows the LMS7002M to operate from a single supply rail of 1.8V with individual blocks capable of being powered down for further power savings.
Interfaces
The LMS7002M has a standard serial port interface (SPI) for programming and includes provision for a full RF calibration. The device combines LNA, PA driver, RX/TX mixers, RX/TX filters, synthesizers, RX gain control, and TX power control with very few external components.
Design Tools
The chip is programmed by a serial bit stream and is designed using an open source configuration tool suite. The GUI provides access to all the parameters in each block. Designers can accept the defaults or change the control settings that are downloaded to the devices to meet their system requirements.
The LMS7002M is packaged in a 11.5 x 11.5mm aQFN 261-pin package. It is available with the Universal Wireless Communications Toolkit (UWCT), which includes an evaluation board and associated software.
Functionality and cost
The LMS7002M FPRF transceiver can be used as a software-configured, fully-functional MIMO transceiver or to replace discrete ADC, DAC, DDS (direct digital synthesizer), AGC or RSSI (received signal strength indicator) devices. It has been priced aggressively to compete with these discrete components, allowing it to replace several individual chips.
Please directly for full information.
Field Programmable Radio Frequency (FPRF) chip
Dual transceiver ideal for MIMO
User programmable on the fly
Continuous coverage of the 100kHz-3.8GHz RF frequency range
Digital interface to baseband with on chip integrated 12 bit D/A and A/D converters
Programmable RF modulation bandwidth up to 120MHz using analog interface
Programmable RF modulation bandwidth up to 56MHz using digital interface
Supports both TDD and full duplex FDD
LimeLight(TM) digital IQ interface – JEDEC JESD207 TDD and FDD compliant
Transceiver Signal Processor block employs advanced techniques for enhanced performance
Single chip supports 2×2 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)
261pin aQFN 11.5×11.5 mm package
Power down option
Serial port interface
Low power consumption, typical 880mW in full 2×2 MIMO mode (550mW in SISO mode) using external LDOs
Multiple bypass modes for greater flexibility
Product brief
Documentation
LMS7002M S-parameters
LMS7002M Layout Recommendation Document
LMS7002M Analog IQ Interface
LMS7002M Power Supply Connection
Quick Starter Manuals
PCB Database
Package content:
KiCad Design Files
PCB Manufacturing info
PDF (Schematic, Layout, Drill)
UNITE7002 PCB Database Package (5.6 Mb):
LMS7002EVB PCB Database Package (4.5 Mb):
Stream PCB Database Package (10.4 Mb):
UNITE7002 / LMS7002EVB7 Software
Package content:
GUI ‘lms7suite’
Waveforms (CW, W-CDMA)
Windows drivers
MCU firmware
Readme file
Evaluation Kit Software Package (3.6 Mb):
Stream & UWCP Software
Package content:
GUI ‘lms7suite’
Waveforms (CW, W-CDMA)
Windows drivers
MCU firmware
FPGA bitstream
Readme file
Design Kit Software Package (18.2 Mb):
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