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
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 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)
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
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.
AD8345 Companion Parts
Recommended Differential Dual Baseband TxDAC's
- For higher bandwidths using data rates up to 250MSPS, with low noise and IMD: AD9747, AD9125, AD9125.
- For ultrlow noise and IMD at 1000MSPS: AD9125, AD9122, AD9122, AD9125, AD9146.
- For even lower power requirements up to 125MSPS: AD9717.
- For direct conversion transmit applications up to 500 MSPS: AD9783, AD9122, AD9122.
- For generating differential I and Q currents up to 125MSPS: AD9117.
Product Selection Guide (1)
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
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.