Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Frequency:	0Hz ~ 800MHz
P1dB:	2dBm
Gain:	16.5dB ~ 18.5dB
Noise Figure:	3dB
RF Type:	ISM, PCS, WLL, 802.16/WiMax
Voltage - Supply:	2.8 V ~ 4.2 V
Current - Supply:	12mA ~ 25mA
Test Frequency:	500MHz
Package / Case:	SOT-86
Supplier Device Package:	86 Plastic Package

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RF amplifiers are an important category of electronic components used to increase the power or signal of an incoming signal. An RF amplifier consists of a power amplifier and a low-noise amplifier (LNA) connected in series and can amplify signals in the sub-1 GHz range. The power amplifier provides gain in terms of power while the LNA provides gain in terms of signal. RF amplifiers such as the MSA-0686-TR2G are widely used in a variety of applications including military communications, wireless communications, and instrumentation.The MSA-0686-TR2G is a two-stage RF amplifier module designed for wideband systems operating in the 0.5 to 6 GHz range. It is designed for the harsh environment applications found in military applications and provides stable performance with high gain and low noise. The module consists of two sections: an LNA for low-noise gain and an output stage for power amplification. The LNA section provides low-noise gain over the 0.5–6 GHz range, while the output stage provides high gain and power over the same range.The LNA section of the MSA-0686-TR2G consists of a one-stage cascode amplifier configured as an active balanced mixer. The LNA is composed of two identical circuit blocks that are driven by a LO signal. Each circuit block consists of an input transistor that is matched to the oxidation rate of the substrate. The input stage converts the incoming RF signal into an IF signal which is then amplified by the cascode amplifier. The gain of the LNA is determined by the current in the input stage and can be adjusted by varying the current level.The output stage is composed of two identical amplifier stages cascaded in series, acting as a single-ended amplifier. The gain of the output stage is controlled by the transconductance of the two amplifier transistors and the current level in the output stage. The gain of the amplifier can be adjusted by adjusting the current level. The input and output matching networks and the thermal stabilization system provide stability to the circuit.The MSA-0686-TR2G is capable of providing up to 10 dB of gain at frequencies of up to 6 GHz. It has a noise figure of 6.5 dB and a distortion of -60dBc. It also features an integrated phase-locked loop to maintain the gain stability over temperature. It can be powered with either a +12V or +20V supply and is capable of handling RF input powers up to +10 dbm.Overall, the MSA-0686-TR2G RF amplifier module is a high-performance two-stage amplifier designed for wideband systems in the 0.5 to 6GHz range. It provides excellent noise performance, high gain, and stability over temperature, making it ideal for military applications. It is also flexible in terms of power requirements and can be powered by either a +12V or +20V supply. The adjustable gain and current levels make it easy to configure the amplifier for different applications and conditions.

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