SP3075EEN-L

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The SP3075EEN-L is a high-speed, single-channel, low-voltage AC-coupled transimpedance amplifier designed for the monitoring of long haul telecommunication systems. It operates from a single 3.3V supply and is optimized for the demanding applications in the 40 to 900 MHz frequency range. It contains a transimpedance amplifier, a high-speed comparator, a monitor detector section with an adjustable threshold and a non-inverting gain stage.

The SP3075EEN-L interfaces to the photodiode in the conventional transimpedance configuration, with an AC-coupled photodiode current applied to the non-inverting input. The comparator threshold voltage is adjustable over a range of 100mV to 650mV on-chip. The output of the transimpedance amplifier sets the optimum output voltage of the photodiode to ensure the best performance.

The SP3075EEN-L provides two selectable gain options with a gain of either 10dB or 0dB. The 10dB and 0dB gain settings provide additional flexibility in system design, with the additional gain helping to improve low-level signals in the presence of high-noise environment or when driving a long transmission line. The gain of the transimpedance amplifier can be adjusted using the on-chip variable gain stage.

The SP3075EEN-L also includes a selectable low-pass filter which can be used to reduce unwanted RF signals. The low-pass filter has a -6dB cut-off frequency of 40MHz and a -24dB cut-off frequency of 80MHz. The low-pass filter is switched on and off with the on-chip digital control. The low-pass filter helps to reduce unwanted RF signals, especially in long-haul applications, and allows the response of the system to focus on the desired application bandwidth.

The SP3075EEN-L is suitable for use in a variety of applications including optical line terminal (OLT) systems, microwave backhaul, satellite, and optical transport systems. The device is designed to provide excellent reliability and robust performance over an extended temperature range (-40°C to +85°C). The device is RoHS-compliant, and packaged in an industry-standard 8-pin LLP package.

In summary, the SP3075EEN-L is a high-performance AC-coupled transimpedance amplifier designed for use in long-haul transmission systems. It features adjustable gain, adjustable comparator threshold, selectable low-pass filter and high operating temperatures. The device provides reliable performance and robust design, making it an ideal choice for a wide range of applications.

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