Features and Benefits

  • Cartesian amplitude and phase modulation
  • 1.5 GHz to 2.4 GHz frequency range
  • Continuous magnitude control of −4.5 dB to −34.5 dB
  • Continuous phase control of 0° to 360°
  • Output third-order intercept 17.5 dBm
  • Output 1 dB compression point 8.5 dBm
  • Output noise floor −150.5 dBm/Hz at full gain
  • Adjustable modulation bandwidth up to 230 MHz
  • Fast output power disable
  • 4.75 V to 5.25 V single-supply voltage 

Product Details

The AD8341 vector modulator performs arbitrary amplitude and phase modulation of an RF signal. Because the RF signal path is linear, the original modulation is preserved. This part can be used as a general-purpose RF modulator, a variable attenuator/phase shifter, or a remodulator. The amplitude can be controlled from a maximum of −4.5 dB to less than −34.5 dB, and the phase can be shifted continuously over the entire 360° range. For maximum gain, the AD8341 delivers an OP1dB of 8.5 dBm, an OIP3 of 17.5 dBm, and an output noise floor of −150.5 dBm/Hz, independent of phase. It operates over a frequency range of 1.5 GHz to 2.4 GHz.

The baseband inputs in Cartesian I and Q format control the amplitude and phase modulation imposed on the RF input signal. Both I and Q inputs are dc-coupled with a ±500 mV differential full-scale range. The maximum modulation bandwidth is 230 MHz, which can be reduced by adding external capacitors to limit the noise bandwidth on the control lines.

Both the RF inputs and outputs can be used differentially or single-ended and must be ac-coupled. The RF input and output impedances are nominally 50 Ω over the operating frequency range. The DSOP pin allows the output stage to be disabled quickly in order to protect subsequent stages from overdrive. The AD8341 operates off supply voltages from 4.75 V to 5.25 V while consuming approximately 125 mA.

The AD8341 is fabricated on Analog Devices’ proprietary, high performance 25 GHz SOI complementary bipolar IC process. It is available in a 24-lead, lead-free LFCSP package and operates over a −40°C to +85°C temperature range. Evaluation boards are available.


  • RF PA linearization/RF predistortion
  • Amplitude and phase modulation
  • Variable attenuators and phase shifters
  • CDMA2000, WCDMA, GSM/EDGE linear power amplifiers
  • Smart antennas


Samples part number AD8341ACP and an evaluation board, part number AD8341-EVAL, are available.

Companion Products

AD8302 - LF - 2.7GHz RF/IF Gain Phase Detector

AD8340 - RF Vector Modulator 700MHz to 1000MHz

Other Modulator / Demodulator Products

AD8345 - 250MHz to 1000MHz Low Noise RF/IF Modulator

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

AD8347 - 800MHz to 2.7GHz Direct Conversion Demodulator

AD8348 - 50MHz to 1000MHz RF/IF Quadrature Demodulator

AD8349 - 700MHz - 2.7GHz Low Noise Direct Up Conversion Modulator

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Tools & Simulations

Design Tools


ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.


ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.

Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.