AD8345 140 MHz to 1000 MHz Quadrature Modulator

Product Details

The AD8345 is a silicon RFIC quadrature modulator, designed for use from 140 MHz to 1000 MHz. The part provides a very low noise floor and high output power supporting a significant improvement in output dynamic range. The AD8345 needs a low LO drive level and provides a fully specified 50 Ω buffered output.

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

Additionally the AD8345 has been tested and supports the requirements as an IF modulator within CDMA/GSM/W-CDMA cellular infrastructure equipment and as a direct conversion modulator for the 800 – 900 MHz cellular bands.

The AD8345 is supplied in 16-lead Thin Shrunk Small Outline (TSSOP) package with exposed paddle, and fully specified over –40°C to +85°C temperature range.


Samples part number (AD8345ARE) and an evaluation board, part number (AD8345-EVAL) are available.


AD8346 – 800 MHz to 2.5 GHz Lower Power Direct Up-Conversion Modulator

AD8347 – 800 MHz to 2.7 GHz Direct Conversion Demodulator

AD8349 – 700 MHz to 2.7 GHz Low Noise, Higher Output Drive, RF Modulator

Features and Benefits

  • Output frequency range 140 MHz to 1000 MHz
  • I/Q baseband frequency range dc – 80 MHz output power +2.5 dBm P1 dB
  • Noise floor –155 dBm/Hz
  • Quadrature phase accuracy 0.5 deg rms
  • Amplitude balance 0.2 dB
  • Single 2.7 V – 5.5 V supply
  • Pin compatible with AD8346 / AD8349