Software Defined Radio

LimeSDR Mini 2.0

An open, full-duplex, USB stick software defined radio

LimeSDR Mini 2.0 top and bottom side-by-side

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LimeSDR Mini 2.0 is an upgraded, drop-in replacement for LimeSDR Mini, a hardware platform for developing and prototyping high-performance and logic-intensive digital and RF designs that use an FPGA coupled with Lime Microsystems’ LMS7002M RF transceiver.

Goodbye, LimeSDR Mini

Since we first introduced LimeSDR Mini nearly five years ago, we’ve shipped tens of thousands of units to engineers around the world for use in everything from satellite ground stations to digital television. Whether you’re a hobbyist using LimeSDR Mini to learn about software defined radio, or a company integrating hundreds of LimeSDR Minis into your commercial product, we’ve been thrilled at the breadth and depth of LimeSDR Mini applications you’ve come up with. Which is why it’s been especially difficult to watch all of this come to a grinding halt over the last year due to the global electronics and chip shortage.

Hello, LimeSDR Mini 2.0

Rather than wait indefinitely and hope the supply chain rewinds to a time we’re unlikely to see again soon, we went back to the drawing board. The result is LimeSDR Mini 2.0, a software defined radio with the same form factor as the original LimeSDR Mini, the same LMS7002 RF transceiver, but a new FPGA - the Lattice ECP5. Not only is the ECP5 more readily available than the Intel MAX10 FPGA used in the previous design, but it has an extensive set of open source tools and a great community of developers.

LimeSDR Mini 2.0 prototype at an angle

Block Diagram

LimeSDR Mini 2.0 block diagram
LimeSDR Mini 2.0 prototype at an angle

Comparisons

LimeSDR Mini 2.0 LimeSDR Mini LimeSDR HackRF OneEttus B200Ettus B210BladeRF x40RTL-SDR
Frequency Range10 MHz - 3.5 GHz 10 MHz - 3.5 GHz 100 kHz - 3.8 GHz 1 MHz - 6 GHz70 MHz - 6 GHz70 MHz - 6 GHz300 MHz - 3.8 GHz22 MHz - 2.2 GHz
RF Bandwidth40 MHz 40 MHz 61.44 MHz 20 MHz61.44 MHz61.44 MHz40 MHz3.2 MHz
Sample Depth12 bits 12 bits 12 bits 8 bits12 bits12 bits12 bits8 bits
Sample Rate30.72 MSPS 30.72 MSPS 61.44 MSPS 20 MSPS61.44 MSPS61.44 MSPS40 MSPS3.2 MSPS
TX Channels1 1 2 11210
RX Channels1 1 2 11211
DuplexFull Full Full HalfFullFullFullN/A
InterfaceUSB 3.0 USB 3.0 USB 3.0 USB 2.0USB 3.0USB 3.0USB 3.0USB 2.0
Programmable Logic Gates44K 16K 40k 64 macrocell CPLD75k100k40k (115k avail)N/A
ChipsetLMS7002M LMS7002M LMS7002M MAX5864, MAX2837, RFFC5072AD9364AD9361LMS6002MRTL2832U
Open SourceFull Full Full FullSchematic, FirmwareSchematic, FirmwareSchematic, FirmwareNo
Oscillator Precision±1 ppm initial, ±4 ppm stable ±1 ppm initial, ±4 ppm stable ±1 ppm initial, ±4 ppm stable ±20 ppm±2 ppm±2 ppm±1 ppm?
Transmit Powermax 10 dBm (depending on freq.) max 10 dBm (depending on freq.) max 10 dBm (depending on freq.) -10 dBm+ (15 dBm @ 2.4 GHz)10 dBm+10 dBm+6 dBmN/A
LimeSDR Mini 2.0 prototype top

Open Source

We pride ourselves on the openness of LimeSDR Mini 2.0. Before going to production, we will release the following source files:

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LimeSDR Mini 2.0 prototype bottom

In the Press

eeNews Europe

"[Lime SDR Mini 2.0] uses a larger field-programmable gate array (FPGA) for projects looking to perform operations on-device and ease the load on the host processor."

OneSDR logo

OneSDR Blog

"[Lime] have replaced the Intel MAX 10 FPGA with a Lattice Semiconductor ECP5. This dramatically increases the number of programmable logic gates on-board from 16k to 44k."

Hackster News

"It’s the end of an era: the original LimeSDR Mini is officially being retired. However, there is nothing to mourn as a drop-in replacement is being launched in its wake. "


About the Team

Lime Microsystems

Guildford, England  ·  LimeMicro  ·  myriadrf  ·  limemicro.com

Working toward the democratization of wireless communication through an open source ideology.

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