AD8346 2.5 GHz Direct Conversion Quadrature Modulator

Product Details

The AD8346 is a silicon I/Q quadrature modulator, designed to be used from 800 MHz to 2.5 GHz. The part is optimized for lower power applications, yet provides a very low noise floor and high output power for the given supply current.

The AD8346 requires only −10 dBm LO drive level and provides a fully specified 50 ohm buffered output.

The part provides excellent amplitude and phase balance and sideband suppression specifications to enable higher order/capacity QAM modulated radios.

Additionally the AD8346 has been tested and provides −72 dBc ACPR when used in a direct up-conversion CDMA IS95 modulator.

The AD8346 is supplied in 16-lead Thin Shrunk Small Outline (TSSOP) package, and fully specified over −40 to 85 degC temperature range.


Samples part number (AD8346ARU) and an evaluation board, part number (AD8346-EVAL) are available


AD8345 - 250 MHz - 1 GHz RF/IF Quadrature Modulator

AD8347 - 800 MHz - 2.7 GHz RF/IF Quadrature Demodulator

AD8349 - 800 MHz - 2.7 GHz Direct Up-Conversion Quadrature Modulator

Features and Benefits

  • Output Frequency range 800 MHz to 2.5 GHz
  • I/Q Base-band Frequency range dc to 70 MHz
  • Output Power −3 dBm P1 dB
  • Noise Floor −147 dBm/Hz
  • Quadrature Phase Accuracy 1 deg rms
  • Amplitude Balance 0.2 dB
  • Low Power with Power Down Function
  • Single 2.7 V to 5.5 V Supply
  • Pin compatible with AD8345/AD8349