LMX2347TMX/NOPB

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The LMX2347TMX/NOPB is a low-power, precision clock and frequency synthesizer developed by Texas Instruments, specifically designed for clock and frequency synthesizer applications. This device integrates both a phase-locked loop (PLL) and direct digital synthesizer (DDS) to provide a solution that allows user to synthesize any number of output frequencies from a single reference clock input. It is available in a space-saving, 16-pin Thin Shrink Small Outline Package (TSSOP) and is an excellent choice for applications requiring frequency options at a low cost.

The LMX2347TMX/NOPB is well-suited for a variety of clock and frequency synthesis applications, including clock generators, digital frequency synthesizers, jitter attenuators, and clock sources for high-speed digital systems, such as clock displays, digital video equipment, and medical diagnostic systems. It offers users several advantages, including low power consumption, fast switching speed, small size, and higher resolution than many other devices.

Application Field

The LMX2347TMX/NOPB\'s PLL and DDS architectures provide a variety of useful features for clock/timing applications. The LMX2347TMX/NOPB can be used as a clock generator to provide multiple clock frequencies from a single reference clock. These multiple output clocks can be used for a variety of applications, including clock-generator synchronization for telecom and Ethernet systems, clock distribution for digital video systems, and time-division multiplexing (TDM). The device also supports jitter attenuation, frequency conversion, and frequency transformation.

In addition to providing clock synthesis support, the LMX2347TMX/NOPB can also be used as a direct digital synthesizer (DDS) to customize frequencies for specific applications. For example, the LMX2347TMX/NOPB can be used to synthesize a carrier frequency for wireless communication or broadcast systems, or to generate digital audio signals for audio products.

Working Principle

The LMX2347TMX/NOPB is based on two architectures - the PLL and the DDS. It uses the PLL architecture to convert a reference clock to multiple output frequencies, while the DDS architecture converts a reference clock to a single frequency.

For PLL applications, the LMX2347TMX/NOPB contains an on-chip loop filter, VCO, divider, and clock-synthesis circuitry. It accepts a reference clock ranging from 8 kHz to 8 MHz and provides several different output frequencies. The output clock frequencies are determined by the input reference clock frequency and the programmed feedback settings (multiplexers) and can range from 1 kHz to 4 MHz, depending on the input frequency. The device also contains on-chip counters, allowing users to program precise clock frequencies.

For DDS applications, the LMX2347TMX/NOPB contains an on-chip accumulator, memory, and DDS core. It also contains a charge pump and loop filter to program the value of the accumulation register used by the DDS. The input reference clock can be programmed from 8 kHz to 8 MHz, and the output frequency can range from 0 Hz to 1 MHz (up to Fref/512). This allows users to generate a wide range of output frequencies.

In addition to providing support for both PLL and DDS architectures, the LMX2347TMX/NOPB also offers users a variety of features, including on-chip synchronization, clock auto-switching, and programmable phase-offset and jitter-reduction techniques. These features make the LMX2347TMX/NOPB an excellent choice for clock and frequency synthesizer applications requiring frequency and cost.

The specific data is subject to PDF, and the above content is for reference