Current - Receiving:	24mA
Supplier Device Package:	24-QFN (4x4)
Package / Case:	24-VFQFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply:	3 V ~ 5.5 V
Features:	--
Antenna Connector:	PCB, Surface Mount
Memory Size:	--
Data Interface:	PCB, Surface Mount
Series:	--
Applications:	Automotive Audio
Modulation or Protocol:	FM
Data Rate (Max):	--
Sensitivity:	--
Frequency:	76MHz ~ 108MHz
Part Status:	Active
Packaging:	Tray

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SI4749-C10-GM RF Receivers

The SI4749-C10-GM is an integrated Miniature RF Receiver designed for use in the automotive market. It includes an integrated low noise amplifier (LNA), a mixer, an Intermediate Frequency (IF) filter, an IF amplifier, and a proprietary microcontroller. The LNA is capable of amplifying signals up to 40dB gain and is able to perform single-ended input for the RF port. The mixer is highly linear and allows the reception of multiple frequencies. The IF filter is an analog filter with selectable bandwidths of 23kHz, 34kHz, or 89kHz. The IF amplifier has a variable attenuator to reduce the gain. The microcontroller is a standard 8051-based processor with 128K of onboard flash memory.

Application Fields

The SI4749-C10-GM is well-suited for multiple applications in the automotive market. It can be used as a remote control receiver, an input to an audio system, or an antenna switch in an automotive navigation system. It is also ideal for use in car radios as it has a built-in demodulator and is capable of switching between multiple channels. Additionally, the integrated LNA is excellent for weak signal reception and allows for extended signal range.

Working Principle

The SI4749-C10-GM is an integrated RF Receiver. It works by receiving a radio signal from an antenna input and passing it through the integrated LNA. The signal is then mixed with a local oscillator and filtered by the IF filter. The filtered signal is then amplified by the IF amplifier and sent to the microcontroller for demodulation. The microcontroller is capable of decoding AM/FM/WB signals and can switch frequencies with a programmable frequency selector. The receiver is also capable of audio output, allowing it to be connected to a car stereo system or other audio device.

Conclusion

The SI4749-C10-GM is an excellent choice for use in automotive applications. It has a wide range of features and can be used for multiple purposes. Its integrated LNA and IF filter provide excellent signal reception while the adjustable IF amplifier prevents signal overload. The integrated microcontroller allows for easy control and switching between multiple frequencies. The SI4749-C10-GM is an efficient and cost-effective solution for any automotive receiver needs.

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