Si4022

The Si4022 is a single-chip, low-power, multi-channel FSK RF transmitter designed for use in applications requiring FCC or ETSI conformance for unlicensed use in the bands at 868 and 915 MHz. Used in conjunction with Silicon Labs' FSK receivers, it is a flexible, cost-effective, and highly integrated solution that does not require production alignments.

Used in conjunction with EZRadio FSK receivers, the Si4022 RF transmitter is a flexible, cost-effective, and highly integrated solution that does not require production alignments. All required RF functions are integrated. Only an external crystal and bypass filtering are needed for operation.

Features

Fully integrated (low BOM, easy design-in)
Automatic antenna tuning
Fast frequency-hopping capability
Fast-settling, programmable, high-resolution PLL synthesizer
No alignment required in production
Stable and accurate FSK modulation with programmable deviation
Programmable PLL loop bandwidth
SPI bus for applications with microcontroller
Clock output for microcontroller
Integrated programmable crystal load capacitor
Integrated programmable crystal load capacitor
Power-saving sleep mode

Applications

Remote control
Home security and alarm
Wireless keyboard/mouse and other PC peripherals
Wireless toys
Remote keyless entry
Tire pressure monitoring
Telemetry
Personal/patient data logging
Remote automatic meter reading

Technologies

High bit rate (up to 256 kbps)
Direct loop antenna drive
Programmable output power level
Alternative OOK support
EEPROM mode supported

Documentation Expand All Collapse All

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Data Sheet (1)

Document Name	Description	Version	Last Updated
Si4022.pdf	Si4022 Data Sheet	1.1	10/2/2009

User Guides (1)

Document Name	Description	Version	Last Updated
WDS_Chip_Config_UG.pdf	WDS Chip Configurator User Guide	0.2	4/9/2010

Application Notes (1)

Document Name	Description	Version	Last Updated
an421.pdf	AN421: Antenna Selection Guide for the Si4020 and Si4320 ISM Band FSK Transmitter/Receiver Chipset	1.5	6/25/2009

White Papers (1)

Document Name	Description	Version	Last Updated
Key-Priorities-for-Sub-GHz-Wireless-Deployments.pdf	The benefits and trends of sub-GHz wireless IC systems among various industry applications

PCN (1)

Document Name	Description	Version	Last Updated
0912241-Si4022-A1_Si4322-A1_EOL.pdf	Si4022-A1-FT/FDI and Si4322-A1-FT/FDI EOL

Design Resources

Design Tools Expand All Collapse All

Get notified when these files are updated.

Software (8)

Document Name	Description	Version	Updated
Battery Life Calculator.zip	Battery Life Calculator
Chip Configurator Scripts.zip	Chip Configurator Scripts
Chip Configurator.zip	Chip Configurator v2.4 (unsupported version)	2.4
WDS3-Setup.exe	Chip Configurator v3.1.4.0	3.1.4.0 (7 Dec 2011)	12/7/2011
EZLinkChat.zip	EZLinkChat
LoadBoard_2.x_driver.zip	Loadboard (MSC-DKLB2.x) USB Driver	2.x
dotnetfx.zip	Microsoft®.NET
WDS Terminal Emulator.zip	WDS Terminal Emulator

Schematics/Layout (7)

Document Name	Description	Version
Si4022-DKDB13.zip	4022 Schematics/Layout (50Ohm)	1.1
402x-DKDB11.zip	402x Schematics/Layout (434 Loop)	5.2
402x-DKDB1314.zip	402x Schematics/Layout (50Ohm)	5.4
402x-DKDB3.zip	402x Schematics/Layout (868 BIFA)	5.1
402x-DKDB2.zip	402x Schematics/Layout (915 BIFA)	5.2
402x-DKDB10.zip	402x Schematics/Layout (HB Loop)	5.0
402x-DKDB7.zip	402x Schematics/Layout (xLoop)	5.2

Training (1)

Document Name	Description	Version	Updated
WDS-1-Radio-Control-Panel.swf	Wireless Development Suite — Radio Control Panel Wireless Development Suite — Radio Control Panel

Product Matrix

Part Number		Available Documents	Output Power 868 MHz	Output Power 434 MHz	Supply Voltage	Sensitivity	Package	FSK	Description	OOK	Frequency Bands
Si4022		Data Sheet	6 dBm	8 dBm	2.2 - 3.8 V	-	TSSOP16	115 kbps	TX	-	868, 915 MHz

Note: Supported for existing production, but not recommended for new designs. The Si4010 and Si4313 devices are recommended for new designs.

EZRadio Recommended Parts

The integrated power amplifier of the transmitter has an open-collector differential output and can directly drive a loop antenna with programmable output level, no additional matching network is required. An automatic antenna tuning circuit is built in to avoid both costly trimming procedures and de-tuning due to the "hand effect."

For battery-operated applications the device supports various power-saving modes with wake-up interrupt generation options based on a low battery voltage detector and a sleep timer. Several additional features ease system design. Power-on reset and clock signals are provided to the microcontroller. An on-chip baud rate generator and a data FIFO are available. The transmitter is programmed and controlled via an SPI-compatible interface.

Training & Resources

Featured Videos

C8051F96x and Si102x/3x DC-DC Converter Enables Extended Battery Life		C8051F96x and Si102x/3x Autonomous Pulse Counter for Water & Gas Meters		Si1000 Wireless MCU in Smart Metering Applications
Designing a Low Power Wireless Remote Control		ISM Band GHz Transceiver ICs for Embedded RF Wireless Design

Featured Utilities

Wireless Product Selector

Silicon Labs' Wireless Product Selector will help you identify the right wireless product for your application. Simply make the selections that best describe your design, and the appropriate product with all supporting documentation, development software and hardware will be displayed. In less than a minute, we'll match you to the right wireless product for your project!
» Wireless Product Selector

Battery Life Calculator

Silicon Labs' Battery Life Calculator is an easy-to-use web-based utility that gives designers a quick and easy way to understand the discharge characteristics of different system configurations to help optimize low-power applications.
» Battery Life Calculator

Featured White Papers

Designing Power Efficient Smart Gas and Water Utility Meters

Designing a smart water or gas utility meter can present a vexing low-power challenge for embedded control systems requiring RF connectivity. Since a single service call from a technician often exceeds the entire cost of the smart meter, battery life must exceed 20 years.
» Designing Power Efficient Smart Gas and Water Utility Meters
» 积少成多：如何设计智能燃气表和水表实现能源效率最大化

Energy Harvesting Tipping Point for Wireless Sensor Nodes

The ability to power wireless sensor nodes from harvested energy sources allows embedded designers to offer self-sustaining systems with significantly reduced cost of ownership for the end-user as well as benefits to the environment. Discover key design considerations for wireless sensor nodes powered by harvested energy sources as they become commercially viable and commonplace technologies used in our homes, offices, factories and infrastructure.
» Energy Harvesting Tipping Point for Wireless Sensor Nodes

How to Simplify the Design of an RF Remote Control

System-on-chip (SoC) transmitter solutions greatly simplify the process of designing a remote control and reduce system bill of materials (BOM) cost by eliminating the need for numerous discrete components. The three most common challenges that designers have when designing RF remote controls are maximizing transmission range, ensuring long battery life and maintaining low system costs
» How to Simplify the Design of an RF Remote Control

Featured Presentations and Tutorials

Si1000 Technical Training

This module covers the technical aspects of the Si1000 single chip wireless MCU and the integrated features of the device. It covers the internal operation of the device as well as application advantages such as antenna diversity and automatic frequency control.
» Si1000 Technical Training

EZMac™ PRO Software Training

This training module introduces the EZMac™ PRO MAC layer software stack. The module starts with an network overview and then provides a comprehensive overview of features including the packet format, Listen Before Talk, frequency redundant reception. In addition, network functions are covered including packet forwarding and auto-acknowledgement. The module concludes with an overview of the API and how EZMac PRO is implemented in the end system.
» EZMac PRO Software Overview

Wireless

Title Content
Si4022 RF Transmitter

Features

Applications

Technologies