SI4739-C40-GMR

Current - Receiving:	19.9mA
Supplier Device Package:	20-QFN (3x3)
Package / Case:	20-UFQFN Exposed Pad
Operating Temperature:	-20°C ~ 85°C
Voltage - Supply:	2.7 V ~ 5.5 V
Features:	RSSI Equipped
Antenna Connector:	PCB, Surface Mount
Memory Size:	--
Data Interface:	PCB, Surface Mount
Series:	--
Applications:	General Purpose
Modulation or Protocol:	AM, FM, WB
Data Rate (Max):	--
Sensitivity:	--
Frequency:	520kHz ~ 1.71MHz, 64MHz ~ 108MHz, 162.4MHz ~ 162.55MHz
Part Status:	Active
Packaging:	Tape & Reel (TR)

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RF Receivers: SI4739-C40-GMR Application Field and Working Principle

The SI4739-C40-GMR is a receiver device designed to provide superior performance and features for a wide variety of RF receivers. The SI4739-C40-GMR is a 150mW stereo power amplifier integrated with a high-dynamic range mixed signal receiver IC with input capability for FM/AM with replay, HD Radio, DAB, and DAB+. This device is designed for radios used in various applications such as in-car, table top radios, portable audio, and navigation systems. In this article, we will discuss the application field and the working principle of the SI4739-C40-GMR device.The SI4739-C40-GMR supports two main applications: an external IF receiver in FM and digital radio applications, and a dual-channel sub-band digital IF receiver. As an external IF receiver, the SI4739-C40-GMR supports FM reception from 27 to 108MHz, and digital radio reception from 88 to 108MHz. It accepts input from an external FM/AM RF filter, a digital FM detector, and an analog line-in port, and provides output at a nominal level of 3.3V into the appropriate circuit. As a dual-channel sub-band digital IF receiver, the SI4739-C40-GMR processes input from two separate digital IF stages to provide stereo channel separation and pilot detection. Both channels can be individually adjusted for sensitivity, distortion, frequency response, and dynamic range. The device incorporates a wide bandwidth digital AGC to regulate the gains as needed, and can track the antenna signals as they vary. In addition to its application field, the SI4739-C40-GMR also possesses a unique and innovative working principle to ensure high fidelity signal reception. Its circuit architecture and design uses multi-stage signal amplification to reduce noise and distortion while increasing the dynamic range and signal to noise ratio. The device utilizes a low-noise, high performance, full IF-to-baseband demodulation design which supports both analogue FM and digital radio applications. In addition, it features a highly efficient power management system that allows the device to run in a low power state when not in use. The device also has a self-testing function which allows it to perform critical monitoring and testing operations, ensuring a reliable operation of the receiver. In conclusion, the SI4739-C40-GMR is a highly advanced RF receiver device with a dual-channel sub-band digital IF receiver. It can be used in various applications, such as in-car, table top radios, portable audio, and navigation systems. It possesses a unique and innovative working principle consisting of a low-noise, high performance, full IF-to-baseband demodulation design as well as a highly efficient power management system. With its features and specifications, the SI4739-C40-GMR can truly deliver superior performance in a wide variety of RF receiver applications.

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