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SI4468-A2A-IMR

SiLSI4468-A2A-IMR

Silicon Labs
IC RF TxRx Only General ISM < 1GHz 142MHz ~ 1.05GHz 20-VFQFN Exposed Pad
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Overview

The SI4468-A2A-IMR is a high-performance, low-current Sub-GHz wireless transceiver from Silicon Labs EZRadioPRO family, covering frequencies from 142MHz to 1.05GHz. It offers exceptional sensitivity of -133dBm and output power up to 20dBm, making it ideal for long-range narrowband applications. The device supports multiple modulation schemes including 4GFSK and OOK, with a maximum data rate of 1Mbps.

Why Choose This Part

The SI4468 provides a industry-leading link budget through its high 20dBm output power and -133dBm sensitivity. Its highly configurable packet handler and 64-byte FIFOs reduce the processing burden on the host MCU, while the fast wake and hop times enable sophisticated power-saving protocols.

Applications

Smart Utility Metering
Ideal for gas and water meters requiring long-range communication and multi-year battery life using sub-GHz frequencies.
Home Security Systems
Utilizes excellent selectivity and sensitivity to maintain robust links for door sensors and alarm panels through walls.
Industrial Remote Control
Provides reliable command-and-control links in noisy environments using frequency hopping and fast wake times.
Asset Tracking
Employs ultra-low shutdown current of 30nA to preserve battery life in mobile tracking tags.

Key Specifications

GPIO 4
Type TxRx Only
Frequency 142MHz ~ 1.05GHz
Modulation 4FSK, 4GFSK, FSK, GFSK, OOK
Sensitivity -133dBm
Mounting Type Surface Mount
Package / Case 20-VFQFN Exposed Pad
Power - Output 20dBm (Max)
Data Rate (Max) 1Mbps
Voltage - Supply 1.8V ~ 3.8V
Serial Interfaces SPI
RF Family/Standard General ISM < 1GHz
Current - Receiving 10.9mA ~ 13.7mA
Operating Temperature -40degC ~ 125degC
Current - Transmitting 44.5mA ~ 88mA
Supplier Device Package 20-QFN (4x4)

Getting Started

Developers can evaluate this chip using the Silicon Labs Wireless Development Suite (WDS) software and the 4468CPCE20C915M or similar radio board kits. The device is interfaced via a standard 4-wire SPI bus and requires a matching network optimized for the target frequency band, typically 434MHz, 868MHz, or 915MHz.

SI4468-A2A Family

Also available as: SI4468-A2A-IM

Also Consider

CC1120 TITexas Instruments - A popular alternative for high-performance narrowband applications with excellent adjacent channel selectivity.
SX1276 Semtech - Consider this if LoRa spread-spectrum modulation is required for even greater range in high-interference environments.