SR1120 LE-UWB™ Wireless Transceiver IC
The SR1120 is SPARK’s second-generation LE-UWB™ transceiver for designs that require higher data rates, extended range, and multi-antenna support. It delivers ultra-low latency and ultra-low power in a 4 mm × 4 mm QFN32 package for applications that have traditionally required wired connections.
Overview
Engineered for the wire-free edge
Ultra-low power
The SR1120's aggressively duty-cycled architecture achieves orders-of-magnitude better energy efficiency than conventional IoT wireless solutions.
Active receive: 0.34 mA/Mbit/s. Active transmit: 0.10 mA/Mbit/s. Deep sleep: 920 nA. Shutdown: 55 nA.
Enables energy-harvesting configurations and reduced battery size across wearables, peripherals, and sensors.
Active receive: 0.34 mA/Mbit/s. Active transmit: 0.10 mA/Mbit/s. Deep sleep: 920 nA. Shutdown: 55 nA.
Enables energy-harvesting configurations and reduced battery size across wearables, peripherals, and sensors.
Ultra-low latency
The SR1120 provides 25 µs airtime for a 1 kbit payload. Its scheduled-access mechanisms are designed to support repeatable timing within variable RF and network conditions.
Enables wireless implementations for systems that were traditionally only achievable with wires.
Enables wireless implementations for systems that were traditionally only achievable with wires.
Robust coexistence
Frequency hopping and listen-before-talk protocols enable seamless operation alongside BLE, Wi-Fi (2.4, 5, and 6 GHz), USB 3.0, and cellular.
Dynamic spectrum shaping ensures compliance with international UWB emission limits.
Dynamic spectrum shaping ensures compliance with international UWB emission limits.
Low-cost integration
Single 32.768 kHz external crystal. High-efficiency PCB antenna with no external antenna component required.
Standard SPI and Quad-SPI interfaces for straightforward MCU integration. 4 mm × 4 mm QFN32 footprint minimizes board area.
Standard SPI and Quad-SPI interfaces for straightforward MCU integration. 4 mm × 4 mm QFN32 footprint minimizes board area.
UWB Regulation
Worldwide regulatory coverage
The SR1120's 6.2–9.5 GHz band coverage is designed to address UWB regulatory requirements across most major markets worldwide. Its broad frequency coverage enables customers to develop a common hardware platform targeting worldwide certification, simplifying product development and deployment across multiple regions.
SPARK's Worldwide UWB Regulations document provides a detailed breakdown of regional frequency allocations and applicable standards.
SPARK's Worldwide UWB Regulations document provides a detailed breakdown of regional frequency allocations and applicable standards.
Specifications
Complete electrical parameters
RF Performance
Frequency band
6.2–9.5 GHz
TX power
Up to 3 dBm
RX sensitivity
–81 dBm
Symbol rates
20.48 / 27.31 / 40.96 MHz (configurable)
Spectrum
Dynamically reconfigurable, license-free UWB
Digital & Interface
TX FIFO
2 kbit independent
RX FIFO
2 kbit independent
Host interface
Standard SPI, Quad-SPI
Protocol support
Carrier-Sense (CSMA) stack
Power
Supply voltage
1.8–3.3 V
Active RX
0.34 mA per Mbit/sec
Active TX
0.10 mA per Mbit/sec
Deep sleep
920 nA
Shutdown
55 nA
Physical
Package
QFN32, 4 mm × 4 mm
Also available
WLCSP (contact sales)
Operating temperature
–40 to +85 °C (industrial)
Antenna diversity
Supported
Ordering
Ordering information
WLCSP package also available. Contact sales for availability and pricing. Volume pricing available on request.
Reference Designs & Demos
Launch-ready silicon foundations
The SR1120 is the silicon foundation for SPARK's complete library of reference designs.