Power - Output:	20dBm (Max)
Package / Case:	20-VFQFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C
Current - Transmitting:	75mA
Current - Receiving:	13.7mA
Voltage - Supply:	1.8 V ~ 3.6 V
GPIO:	4
Serial Interfaces:	SPI
Memory Size:	--
Sensitivity:	-124dBm
Series:	--
Data Rate (Max):	500kbps
Frequency:	425MHz ~ 525MHz
Modulation:	FSK, GFSK, GMSK, OOK
Protocol:	--
RF Family/Standard:	General ISM
Type:	TxRx + MCU
Part Status:	Active
Packaging:	Tape & Reel (TR)

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SI4438-C2A-GMR Application Field and Working Principle

RF transceiver ICs are integrated circuits containing RF transmitters and receivers. The SI4438-C2A-GMR is a high-performance RF transceiver IC from Silicon Laboratories. The IC is a device containing a complete, cost-effective, low-power, and efficient RF transceiver. Its cost-effectiveness, small size, low power consumption, and low noise figure make it ideal for all types of embedded applications.The SI4438-C2A-GMR offers a frequency coverage of 860-960 MHz, and a data rate of up to 200Kbps. It has an advanced direct conversion receiver architecture with a maximum output of –103dBm and a low noise figure of 1.5dB. The on-board digital demodulator can decode GMSK, 2FSK, and CW modulation.The SI4438-C2A-GMR features an integrated voltage-controlled oscillator (VCO) and low-noise amplifier (LNA). The VCO enables the device to transmit or receive RF energy in the frequency band of interest. The LNA helps to reduce the input-reflected power ratio, improving the receiver’s sensitivity to lower power signals.The SI4438-C2A-GMR has three main operating modes—receive, transmit, and sleep. During the receive mode, the device operates as an ultra-sensitive receiver. In the transmit mode, the device transmits data at up to 200Kbps. During the sleep mode, the device consumes very little power, making it ideal for battery-powered applications.In addition, the SI4438-C2A-GMR has an integrated majority-decision mechanism, which eliminates the need for an external decoder. This helps to reduce the overhead of implementing a wireless communication system. The device also features low-power consumption in low-power sleep mode.The SI4438-C2A-GMR is ideal for a wide range of applications such as wireless sensor networks, industrial automation, Automatic Meter Reading (AMR), machine-to-machine (M2M) communication, remote control, and asset tracking.In conclusion, the SI4438-C2A-GMR is an ideal low-cost, low-power, highly efficient RF transceiver IC. Its versatility, frequency coverage, integrated VCO and LNA, majority-decision mechanism, and low-power-consumption make it an ideal choice for a wide range of wireless applications.

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