AD8339ACPZ

AD8339 is a DC to 50MHz, quad I/Q demodulator and phase shifter. It is configured to be driven by a low-noise preamplifier with differential outputs. It is optimized for the LNA in the AD8332/AD8334/AD8335 family of VGAs. The part consists of four identical I/Q demodulators with a 4× local oscillator (LO) input that divides the signal and generates the necessary 0° and 90° phases of the internal LO that drive the mixers. The four I/Q demodulators can be used independently of each other (assuming that a common LO is acceptable) because each has a separate RF input. Continuous wave (CW) analogue beamforming (ABF) and I/Q demodulation are combined in a single 40-lead, ultracompact chip-scale device, making the AD8339 particularly applicable in high density ultrasound scanners. Application includes medical imaging (CW ultrasound beamforming), phased array systems, radar adaptive antennas, communication receivers.

• 16 phase select on each output (22.5° per step)
• Quadrature demodulation accuracy
• Phase accuracy is ±1°, I/Q amplitude imbalance is ±0.05dB (typ, I x to Qx, all phases, 1σ)
• Bandwidth, 4LO: LF to 200MHz, RF: LF to 50MHz
• Baseband determined by external filtering
• Output dynamic range is 160dB/Hz
• LO drive is <gt/>0dBm (50 ohm), single-ended sine wave, supply: ±5V
• Power consumption is 73mW/channel (290mW total)
• Power-down via SPI (each channel and complete chip)
• 40-lead LFCSP_VQ package, temperature range from -40°C to +85°C

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