Super Sequencer?® With Margining Control And Auxiliary ADC Inputs

The ADRF6702 TxMod is an IQ modulator that includes an integrated phase-locked loop (PLL) and voltage-controlled oscillator (VCO). The PLL synthesizer employs a fractional-N PLL to produce a 2*FLO input for the I-Q modulator. The PLL reference input can range from 12 MHz to 160 MHz. The output from the phase detector regulates a charge pump, which drives an off-chip loop filter. The output of the loop filter is subsequently fed into an integrated VCO. The VCO generates an output at 2*FLO, which is directed to both a quadrature divider and a programmable divider. This programmable divider is managed by a sigma-delta modulator (SDM). The I-Q modulator accepts analog I and Q inputs, which can be at baseband or optionally at a complex intermediate frequency (IF) of up to 200 MHz. This device is manufactured by Analog Devices, Inc.

The ADRF6702 TxMod serves as a crucial component in modern communication systems, particularly for applications requiring high-frequency signal modulation. The integrated PLL and VCO simplify the design by reducing the number of external components needed for frequency synthesis and modulation. The fractional-N architecture of the PLL allows for fine frequency resolution, making it suitable for applications where precise frequency control is essential.

The charge pump's output, which is influenced by the phase detector, is critical for maintaining the desired phase relationship between the input signals. The off-chip loop filter plays a significant role in determining the stability and bandwidth of the PLL, which directly affects the performance of the modulator. The integrated VCO's output frequency of 2*FLO is essential for generating the necessary quadrature signals for I-Q modulation, enabling efficient transmission of information over radio frequencies.

Additionally, the programmable divider's functionality, controlled by the sigma-delta modulator, allows for dynamic adjustments in frequency division, enhancing the flexibility of the system. The ability to accept analog I and Q inputs at both baseband and complex IF frequencies up to 200 MHz provides versatility in application scenarios, accommodating various signal processing needs.

Overall, the ADRF6702 TxMod's combination of integrated components and advanced modulation capabilities makes it an ideal choice for high-performance RF applications, including wireless communication systems, radar, and telemetry. Its specifications and features support the development of efficient and compact designs, essential for modern electronic systems.The ADRF6702 TxMod is an IQ Modulator with integrated PLL and VCO The PLL Synthesizer uses a Fractional-N PLL to generate a 2*FLO input to the I-Q Modulator The PLL reference input is supported from 12MHz to 160MHz. The phase detector output controls a chargepump whose output is integrated in an off-chip loop-filter.

The loop Filter output is then applied to an integrated VCO The VCO output at 2*FLO is then applied to a quadrature divider as well as to a programmable divider. The programmable divider is controlled by a sigma-delta Modulator (SDM). The I-Q Modulator has Analog I + Q inputs which CAN be at baseband or optionally at a complex IF up to 200 MHz By Analog Devices, Inc.

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