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Analog Devices Inc. ADMV4530 Upconverter with Int. PLL+VCO (27-31GHz)

Analog Devices Inc. ADMV4530 Upconverter with Int. PLL+VCO (27-31GHz) features an Inphase/Quadrature (I/Q) mixer that is ideally suited for next-generation Ka-band satellite communications. An integrated low phase noise, fractional-N Phase-Locked Loop (PLL) with a Voltage Controlled Oscillator (VCO), and internal 2x multiplier generate the necessary on-chip Local Oscillator (LO) signal for the I/Q mixer. These aspects eliminate the need for external frequency synthesis. The VCO uses an internal autocalibration routine that allows the PLL to select the necessary settings and locks in approximately 100μs.

The single-ended reference input to the PLL operates up to 500MHz and features internal reference dividers and a multiplier for added flexibility. Additionally, the Phase Frequency Detector (PFD) comparison frequency can be up to 250MHz for integer mode and 160MHz for fraction-N mode.

The upconverter consists of an I/Q mixer that can operate in either I/Q mode with 500MHz of bandwidth or in IF (Intermediate Frequency) mode up to 3GHz of bandwidth, which allows various radio architectures and backward compatibility with legacy systems.

Immediately following the I/Q mixer are stages of gain and variable attenuation. The configuration can achieve a minimum 1dB compression point (P1dB) compression point of 19dBm, eliminating the need for external stages of gain.

A programmable 4-wire serial port interface (SPI) allows adjustment of the quadrature-phase for optimum sideband suppression. In addition, the SPI allows the nulling of LO feedthrough in IF mode. In I/Q mode, the LO feedthrough can be nulled by applying an external DC offset to the differential baseband I/Q inputs.

An IF automatic gain control (AGC) adjusts the IF variable gain amplifier (VGA) to compensate for input power variations. During normal operation, this AGC feature can be enabled or disabled via the SPI. When disabled during normal operation, the AGC feature only works on a test tone during power-down mode to track temperature variations.

The ADMV4530 Upconverter is available in a 40-terminal Land Grid Array (LGA) package and is RoHS compliant.

Features

  • 27GHz to 31GHz RF output frequency range
  • Two upconversion modes
    • Direct upconversion from differential baseband I/Q (I/Q mode)
    • Single upper sideband upconversion (IF mode)
  • 1dB bandwidth: 500MHz (I/Q mode)
  • 2GHz to 3GHz  input frequency range (IF mode)
  • Matched, 50Ω, single-ended RF output
  • Matched, 50Ω, single-ended IF input
  • Programmable baseband I/Q common mode-voltage
  • Sideband rejection and carrier feedthrough optimization
  • Combined RF and IF gain dynamic range: 70dB
  • Programmable automatic IF gain control
  • Programmable via 3-wire or 4-wire SPI
  • -40°C to +85°C operating temperature range
  • 40-terminal, 6mm × 6mm LGA package
  • RoHS compliant

Applications

  • Satellite communication
  • Point to point microwave communication

Development Tools

Evaluation Boards for ADMV4530 Upconverters

Analog Devices Inc. Evaluation Boards for ADMV4530 Upconverters

Allow for efficient evaluation of the ADMV4530.

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Videos

Block Diagram

Block Diagram - Analog Devices Inc. ADMV4530 Upconverter with Int. PLL+VCO (27-31GHz)

Package Outline

Mechanical Drawing - Analog Devices Inc. ADMV4530 Upconverter with Int. PLL+VCO (27-31GHz)
Published: 2020-04-02 | Updated: 2023-06-05