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ADRF6801
750 MHz to 1150 MHz Quadrature Demodulator with Fractional-N PLL and VCO
Overview
Features and Benefits
- IQ demodulator with integrated fractional-N PLL
- LO frequency range: 750 MHz to 1150 MHz
- Input P1dB: 12.5 dBm
- Input IP3: 25 dBm
- Noise figure (DSB): 14.3 dB
- Voltage conversion gain: 5.1 dB
- SPI serial interface for PLL programming
- Quadrature demodulation accuracy:
Phase accuracy: 0.3°
Amplitude accuracy: 0.05 dB - Baseband demodulation: 275 MHz, 3 dB bandwidth
- 40-lead, 6 mm × 6 mm LFCSP
Product Details
The ADRF6801 is a high dynamic range IQ demodulator with integrated PLL and VCO. The fractional-N PLL/synthesizer generates a frequency in the range of 3.0 GHz to 4.6 GHz. A divide-by-4 quadrature divider divides the output frequency of the VCO down to the required local oscillator (LO) frequency to drive the mixers in quadrature. Additionally, an output buffer can be enabled that generates an fVCO/2 signal for external use.
The PLL reference input is supported from 10 MHz to 160 MHz. The phase detector output controls a charge pump whose output is integrated in an off-chip loop filter. The loop filter output is then applied to an integrated VCO.
The IQ demodulator mixes the differential RF input with the complex LO derived from the quadrature divider. The differential I and Q output paths have excellent quadrature accuracy and can handle baseband signaling or complex IF up to 120 MHz.
The ADRF6801 is fabricated using an advanced silicon-germanium BiCMOS process. It is available in a 40-lead, exposed-paddle, RoHS-compliant, 6 mm × 6 mm LFCSP package. Performance is specified over the −40°C to +85°C temperature range.
APPLICATIONS
- QAM/QPSK RF/IF demodulators
- Cellular W-CDMA/CDMA/CDMA2000
- Microwave point-to-(multi)point radios
- Broadband wireless and WiMAX
Product Categories
Product Lifecycle
Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
Documentation
Software & Systems Requirements
Tools & Simulations
Design Tools
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.
Reference Designs (1)
Product Recommendations
ADRF6801 Companion Parts
Recommended Baseband Driver Amplifiers
- For a digital programmable VGA: AD8366.
- For a differential RF/IF amplifier: ADL5562, ADL5565.
- For low noise drivers in low voltage (1.8V) ADC applications: ADA4930-1, ADA4930-2.
- For variable gain and programmable baseband filters: ADRF6510, ADRF6516.
- For selectable gains of 1, 2 or 3: ADA4950-1, ADA4950-2.
Recommended Dual Analog-to-Digital Converters
- For 12-bit performance, low power, low cost and ease of use: AD9231.
- For 14-bit performance, low power and high sampling rate: AD9258, AD9251.
- For 16-bit performance, multistage differential pipeline architecture with integrated quadrature error correction (QEC): AD9269.
- For 16-bit performance, low power and high sampling rate: AD9268, AD9650.
- For 16-bit performance, continuous time sigma delta architecture with integrated QEC: AD9262.
Reference Materials
Product Selection Guide (1)
Design Resources
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.
PCN-PDN Information
Sample & Buy
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