SE5534NG

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SE5534NG is an integrated circuit (IC) for a variable gain amplifier (VGA). It is part of the linear-amplifiers instrumentation, OP Amps, Buffer Amps class of ICs and is used for a variety of applications. The SE5534NG offers a high level of performance and specifications, such as low noise figure, low distortion, low power consumption, good linearity and overall stability.

The SE5534NG offers a wide range of operating voltage, from single supply of 1.3V to dual supplies of +/-5V. It also offers a maximum gain of 54dB, a high dynamic range of 66 dB and a low input noise as little as 4nV/√Hz. A simple and efficient closed-loop architecture enables self-compensation and stability, allowing the IC to be used in a wide variety of applications, including wideband amplifiers, RF amplifiers, AGC, ADCs and DACs.

The SE5534NG is a three-stage operational amplifier (Op Amp). The first stage comprises a single N-channel Metal Oxide Semiconductor Field-Effect Transistor (NMOSFET) connected in a common source configuration. This stage provides current gain, low noise and input impedance. The second stage comprises two P-channel MOSFETs (PMOSFETs). This stage provides voltage gain, low impedance output and low distortion. The third stage comprises two PMOSFETs. This stage converts the differential input voltage to a single-ended one.

The two stages are connected in a closed loop feedback configuration to provide a high linearity and high gain range. The feedback loop is also used to cover a wide gain range, allowing high performance in a wide range of applications. The gain range is set by an external voltage applied to the gain control input, allowing the amplifier to be used in different applications with different gains.

The SE5534NG also features on-board temperature compensation to keep the current bias constant over temperature, thus preserving the linearity and stability of the amplifier. The temperature compensation circuit uses a temperature-dependent resistor to sense the ambient temperature and adjust the bias current of the amplifier.

Overall, the SE5534NG offers an excellent level of performance for an amplifier IC, making it suitable for a wide range of applications, from RF amplifiers to precision AGC circuits. The high level of integration and on-board temperature compensation make this IC ideal for low-power, low-voltage applications.

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