AD8345

140 MHz TO 1000 MHz Quadrature Modulator
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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.

Availability Samples part number (AD8345ARE) and an evaluation board, part number (AD8345-EVAL) are available. Other Modulator / Demodulator Products

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

Product Lifecycle

checked Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits

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Product Details

AD8345-EVALZ is 4-layer, FR4-based evaluation board. For normal operation, it requires a 5 V/200 mA power supply which should be connected to the clip leads labeled VPOS and GND. The LO and baseband inputs (which should be biased at 0.7 V) are applied to edge-mounted SMA-type RF connectors (labeled LO, IP, IN, QP, and QN). The AD8345 output is available at the SMA connector labeled VOUT.

Tools & Simulations

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Design Tools

Product Recommendations

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AD8345 Companion parts

Recommended Differential Dual Baseband TxDAC's

  • For even lower power requirements up to 125MSPS , we recommend the AD9717 .
  • For higher bandwidths using data rates up to 250MSPS, with low noise and IMD , we recommend the AD9747, AD9125 or the AD9125 .
  • For ultrlow noise and IMD at 1000MSPS , we recommend the AD9125, AD9122, AD9122, AD9125 or the AD9146 .
  • For direct conversion transmit applications up to 500 MSPS , we recommend the AD9783, AD9122 or the AD9122 .
  • For generating differential I and Q currents up to 125MSPS , we recommend the AD9117 .

Recommended PLL's

  • For lower cost, power and size with integrated VCO
  • For higher performance, higher frequency and faster locktimes , we recommend the ADF4106 or the ADF4156 .
  • For high performance with integrated VCO , we recommend the ADF4350 .

Recommended RF/IF Driver Amplifiers and Gain Blocks

  • For the full listing of frequency and driving level options

Design Resources

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

AD8345 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints

Sample & Buy

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
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.