Features and Benefits
The AD8349 is high performance quadrature modulator design for use as a single stage up-converter within wireless infrastructure equipment.
The AD8349 provides a high output power and very low noise floor supporting a significant improvement in the output signal range. Additionally the excellent phase and amplitude balance accuracy support a higher sideband suppression specification enabling higher order / capacity QAM modulated radios.
The AD8349 has been tested for use over the common Cellular bands (900 MHz, 1.9 GHz, 2.1 GHz) meeting the needs as specified by the CDMA/GSM Edge/W-CDMA standards.
The AD8349 is supplied in 16-lead Thin Shrunk Small Outline (TSSOP) package, and fully specified over -40ºC to 85ºC temperature range.
- Cellular/PCS communication systems infrastructure
- Wireless LAN/wireless local loop
- LMDS/broadband wireless access systems
Samples (part number AD8349ARE) and an evaluation board (part number AD8349-EVAL) are available. Other Modulator / Demodulator Products
Product Lifecycle 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 (1)
AD8349-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 0.4 V) are applied to edge-mounted SMA-type RF connectors (labeled LO, IP, IN, QP,and QN). The AD8349 output is available at the SMA connector labeled VOUT.
Documentation & Resources
AN-1039: Correcting Imperfections in IQ Modulators to Improve RF Signal Fidelity (Rev. 0)2/14/2015
AN-924: Digital Quadrature Modulator Gain (Rev. A)2/14/2015
AN-0996: The Advantages of Using a Quadrature Digital Upconverter (QDUC) in Point-to-Point Microwave Transmit Systems (Rev. 0)3/25/2009
AN-808: Multicarrier CDMA2000 Feasibility (Rev. 0)11/9/2007
AN-826: A 2.4 GHz WiMAX Direct Conversion Transmitter (Rev. B)12/21/2005
Tools & Simulations
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.
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.
AD8349 Companion Parts
Recommended Differential Dual Baseband TxDAC's
- For generating differential I and Q currents up to 125MSPS: AD9117.
- For ultrlow noise and IMD at 1000MSPS: AD9125, AD9122, AD9122, AD9125, AD9146.
- For even lower power requirements up to 125MSPS: AD9717.
- For higher bandwidths using data rates up to 250MSPS, with low noise and IMD: AD9747, AD9125, AD9125.
- For direct conversion transmit applications up to 500 MSPS: AD9783, AD9122, AD9122.
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.
Sample & Buy
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Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
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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.