AD8333ACPZ-WP I/Q Demodulators by Analog Devices

Status: Production
Series: AD8333
RoHS: Compliant
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The AD8333 is a dual-phase shifter and I/Q demodulator that enables coherent summing and phase alignment of multiple analog data channels. It is the first solid-state device suitable forbeamformer 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 (LO) that drive the mixers of a pair of matched I/Q demodulators.The AD8333 can be applied as a major element in analog beamformer circuits in medical ultrasound equipment.The AD8333 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. For example, if Channel 1 is used as a reference and the RF signal applied to Channel 2 has an I/Q phase lead of 45°, Channel 2 can be phase aligned with Channel 1 by choosing the correct code.Phase shift is defined by the output of one channel relative to another. For example, if the code of Channel 1 is adjusted to 0000 and that of Channel 2 to 0001 and the same signal is applied to both RF inputs, the output of Channel 2 leads that of Channel 1 by 22.5°.The I and Q outputs are provided as currents to facilitate summation. The summed current outputs are converted to voltages by a high dynamic-range, current-to-voltage (I-V) converter, such as the AD8021, configured as a transimpedance amplifier. The resultant signal is then applied to a high resolution ADC, such as the AD7665 (16 bit/570 kSPS).The two I/Q demodulators can be used independently in other nonbeamforming

Prices starting from US$15.59


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Logo for Analog Devices Analog Devices US$20.17
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Logo for Newark Electronics Newark Electronics US$17.91
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Logo for element14 element14 US$16.36
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Logo for Chip One Stop Chip One Stop US$19.40
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Features

Dual integrated I/Q demodulator
16 phase select options on each output (22.5° per step)
Quadrature demodulation accuracy
Phase accuracy: ±0.1°
Amplitude balance: ±0.05 dB
Bandwidth
4 × LO: 10 kHz to 200 MHz
RF: dc to 50 MHz
Baseband: determined by external filtering
Output dynamic range: 159 dB/Hz
LO drive > 0 dBm (50 Ω); 4 × LO > 1 MHz
Supply: ±5 V
Power consumption: 190 mW/channel (380 mW total)
Power-down

Alternative Descriptions

Dual IQ Demodulator | Analog Devices
DEMODULATOR, 0 TO 50MHZ, LFCSP-EP | Farnell
Demodulator, 0 To 50Mhz, Lfcsp-Ep | Newark Electronics


Frequently Asked Questions

Where can I find additional details, specifications and documents for a AD8333ACPZ-WP?

Additional datasheets, footprints and schematics for AD8333ACPZ-WP are listed on our Part Details page. You can also find images and similar parts to AD8333ACPZ-WP on this page.

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What category does AD8333ACPZ-WP fall under?

The AD8333ACPZ-WP is listed under I/Q Demodulators.

Can I view similar or alternative parts?

You can view similar parts to AD8333ACPZ-WP when available in the I/Q Demodulators range under the specifications section at the bottom of the details page.

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Is the AD8333ACPZ-WP RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

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