Si4822/26/40/44

The Si4822/26/40/44 is the first analog-tuned digital-display CMOS AM/FM/SW radio receiver IC that integrates the complete receiver function from antenna input to audio output. Working with a host MCU I²C-compatible 2-wire control interface, frequencies and stereo/mono information can be displayed on an LCD, while the analog-tune features are kept.

Leveraging Silicon Labs' proven and patented digital low intermediate frequency (low-IF) receiver architecture, the Si4822/26/40/44 deliver superior RF performance and interference rejection. The integrated superior control algorithm provides an easy and reliable control interface while eliminating all of the manual tuned external components used in a traditional solution.

For consumer applications that require EN 55020 compliance, use the Si4840/44 family.

Designing Wheel-Tuned, Digital-Display Radios with Next-Generation Radio ICs

Features

Worldwide FM band support (64–109 MHz)
Worldwide AM band support (504–1750 kHz)
SW band support (2.3–28.5 MHz) (Si4826/44 only)
Selectable support for all AM/FM regional bands
2-wire control interface
Mono/Stereo and valid station indicator
Digital volume support
Bass/Treble support
Minimal BOM components with no manual alignment
Excellent real-world performance
Automatic frequency control (AFC)
EN55020 compliant
Two AAA batteries with 2.0 to 3.6 V supply voltage
Wide range of ferrite loop sticks and air loop antenna support
24-pin SSOP package
RoHS compliant

Applications

Table and portable radios
Stereos
Mini/Micro systems
Boom boxes
Clock radios
Modules for consumer electronics
Entertainment systems
Mini HiFi
Docking stations
Toys

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Data Sheet (4)

Document Name	Description	Version	Last Updated
Si4822-26-A10.pdf	Si4822-26-A10 Data Sheet	1.0	11/17/2011
Si4822-26-A10-Chinese.pdf	Si4822-26-A10 Data Sheet (Chinese)	1.0	3/22/2012
Si4840-44-A10.pdf	Si4840-44-A10 Data Sheet	1.0	8/22/2011
Si4840-44-A10-Chinese.pdf	Si4840-44-A10 Data Sheet (Chinese)	1.0	8/26/2011

Data Short (1)

Document Name	Description	Version	Last Updated
Si4840-44_short.pdf	Si4840-44 Data Short	6.13.11	8/22/2011

User Guides (2)

Document Name	Description	Version	Last Updated
Si4822-26DEMO.pdf	Si4822-26-DEMO User's Guide	0.1	11/17/2011
Si484x-DEMO.pdf	Si484x-Demo Board User Guide	0.1	8/22/2011

Application Notes (5)

Document Name	Description	Version	Last Updated
AN602.pdf	AN602: Si4822/26/40/44 Antenna, Schematic, Layout, and Design Guidelines	0.2	11/17/2011
AN602_Chinese.pdf	AN602: Si4822/26/40/44 Antenna, Schematic, Layout, and Design Guidelines (Chinese)	0.2	1/12/2012
AN603.pdf	AN603: Si4822-26-40-44 Demo Board Test Procedure	0.2	11/17/2011
AN610_Chinese.pdf	AN610: Si4822-26-40-44 Programming Guide (Chinese)	0.2	1/18/2012
AN610.pdf	Si4822-26-40-44 Programming Guide	0.2	11/17/2011

White Papers (2)

Document Name	Description	Version	Last Updated
ATDD-Radio-White-Paper.pdf	Designing Wheel-Tuned, Digital-Display Radios with Next-Generation Radio ICs	1.0	8/24/2011
ATDD-Radio-White-Paper-Chinese.pdf	轮调数显收音机系统设计要素	1.0	9/13/2011

Product Matrix

Part Number	Available Documents	Description	Dig I/O	RDS Support
Si4822-A10-CU	Data Sheet	Analog-tuned digital display AM/FM radio receiver	No	No
Si4826-A10-CU	Data Sheet	Analog-tuned digital display AM/FM/SW radio receiver	No	No
Si4840-A10-GU	Data Short	Analog-tuned, digital display AM/FM radio receiver	No	No
Si4844-A10-GU	Data Short	Analog-tuned, digital display AM/FM/SW radio receiver	No	No

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Si4822/26/40/44 Analog-Tuned Digital Display AM/FM/SW Radio Receiver

Features

Applications