This document introduces the ADRF6801, a high dynamic range IQ demodulator with integrated PLL and VCO. The demodulator has a LO frequency range of 750MHz to 1150MHz, 12.5dBm input P1dB, 25dBm input IP3, 14.3dB noise figure (DSB), 5.1dB voltage conversion gain, 0.3° phase accuracy and 0.05dB amplitude accuracy. The demodulator also has a 275MHz, 3dB bandwidth baseband demodulation function and SPI serial interface for PLL programming. The demodulator can be used for QAM/QPSK RF/IF demodulators, cellular W-CDMA/CDMA/CDMA2000, microwave point-to-multipoint radios, broadband wireless and WiMAX etc. applications.
The ADRF6801 IQ demodulator integrates a fractional‑N PLL and VCO to provide a local‑oscillator range of 750 MHz to 1150 MHz. It offers high quadrature accuracy (phase error 0.3°, amplitude imbalance 0.05 dB) and a conversion gain of 5.1 dB. The device is supplied in a 40‑lead 6 mm × 6 mm LFCSP package and operates from –40 °C to +85 °C.
The datasheet includes full specifications, pin descriptions, timing diagrams, absolute maximum ratings, and ESD precautions. It also details the SPI interface for PLL programming, power‑supply requirements, and typical performance characteristics such as phase‑noise and noise figure.
| LO Frequency Range | 750 MHz – 1150 MHz |
|---|---|
| Input P1dB | 12.5 dBm |
| Input IP3 | 25 dBm |
| Voltage Conversion Gain | 5.1 dB |
| Quadrature Phase Error | 0.3° |
| Supply Voltage Range | 5 V (Vs = 5 V) |
The LO frequency range is 750 MHz to 1150 MHz.
The input P1dB rating is 12.5 dBm.
The device operates from a 5 V supply (Vs = 5 V).