TEF6621T/V1T,518

Current - Receiving:	--
Supplier Device Package:	32-SO
Package / Case:	32-SOIC (0.295", 7.50mm Width)
Operating Temperature:	-20°C ~ 85°C
Voltage - Supply:	8.5V
Features:	--
Antenna Connector:	PCB, Surface Mount
Memory Size:	--
Data Interface:	PCB, Surface Mount
Series:	--
Applications:	AM/FM Radio Receiver
Modulation or Protocol:	AM, FM
Data Rate (Max):	--
Sensitivity:	--
Frequency:	--
Part Status:	Active
Packaging:	Tape & Reel (TR)

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RF Receivers: TEF6621T/V1T, 518 Application Field and Working Principle

The TEF6621T/V1T, 518 is a fully integrated, dual-channel radio frequency (RF) receiver chip developed by NXP Semiconductors. It is intended for reception of digital signals in professional audio applications such as wireless microphone systems, professional audio links, automotive infotainment and in-car entertainment.

Features

The TEF6621T/V1T, 518 is a low-IF radio frequency (RF) receiver chip which integrates two radio frequency (RF) receiver channels in a single package. It supports a minimum of two frequency steps per channel, offering a programmable frequency range of 32 MHz to 518 MHz. It offers a high level of integration with two demodulation, filtering and detection blocks, and a wideband low-noise amplifier (LNA). The chip also includes an impedance matcher, a programmable gain amplifier and a low-voltage crystal oscillator (LXO).The device provides various additional features, such as a low-power stand-by mode, a power-on reset, a low-power VCO, a current monitor, and a watchdog timer. It also supports a large selection of modulation formats, including FM, FSK, and PSK. Furthermore, the device provides a wide range of programmable gain control settings.

Application Field

The TEF6621T/V1T, 518 is a highly reliable, robust and cost-effective two-channel RF receiver chip with wide application in professional audio systems, automotive infotainment and in-car entertainment. It is suitable for a range of reception applications, such as in wireless microphones, digital VHF links , automotive infotainment systems, and home entertainment systems.

Working Principle

The TEF6621T/V1T, 518 RF receiver chip operates by first amplifying the received signal using the low-noise amplifier (LNA) and then filtering the signal. The filtered signal is then demodulated and then fed to the detection block for further processing. The detection block uses a combination of frequency demodulation, phase demodulation and level detection to identify the signal. Depending on the modulation format, the detected signal is then output in either digital or analog format.In the case of FM, the demodulator uses a frequency discriminator to identify the frequency-dependent phase differences of the signal, thus allowing the device to detect the frequency of the signal. FSK and PSK modulation formats require the signal to be demodulated using a zero-crossing detector which is capable of detecting the changes in phase in the signal. The demodulated signal is then sent to a digital decoder which is responsible for decoding the received signal.

Conclusion

The TEF6621T/V1T, 518 is a highly reliable and cost-effective two-channel RF receiver chip with wide application in professional audio systems, automotive infotainment and in-car entertainment. It utilizes a low-noise amplifier for amplifying the received signal and demodulating the signal before it is further processed in the detection block. The detection block utilizes different algorithms, depending on the modulation format, for decoding the received signal before it is output in either digital or analog format. Thus, the TEF6621T/V1T, 518 is a versatile, reliable and efficient RF receiver chip that offers an affordable solution for a wide range of audio reception applications.

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