AD8333ACPZ-WP

AD8333 is a dual phase-shifter and I/Q demodulator that enables coherent summing and phase alignment of multiple analogue data channels. It is the first solid-state device suitable for beamformer circuits, such as those used in high-performance medical ultrasound equipment featuring CW Doppler. The RF inputs interface directly with the outputs of the dual-channel, low noise preamplifiers included in the AD8332. A divide-by-4 circuit generates the internal 0° and 90° phases of the local oscillator that drive the mixers of a pair of matched I/Q demodulators. It can be applied as a major element in analogue beamformer circuits in medical ultrasound equipment. This features an asynchronous reset pin. When used in arrays, the reset pin sets all the LO dividers in the same state. Sixteen discrete phase rotations in 22.5° increments can be selected independently for each channel. Application includes medical imaging, phased array systems and communication receivers.

• Dual integrated I/Q demodulator, quadrature demodulation accuracy
• 16 phase select options on each output (22.5° per step)
• Phase accuracy is ±0.1°, bandwidth
• Typical I/Q amplitude imbalance is ±0.05dB (I1xO to Q1xO and I2xO to Q2xO, 1σ)
• Maximum RF frequency range is 50MHz (mixing, VS=±5V, TA=25°C)
• Baseband determined by external filtering, output dynamic range 159dB/Hz
• LO drive <gt/> 0dBm (50 ohm); 4 × LO <gt/> 1MHz
• Supply voltage range from ±4.5 to ±6V (VS=±5V, TA=25°C)
• Temperature rating range from -40°C to +85°C
• 32-lead frame chip scale package [LFCSP]

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ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party