AD8339ACPZ I/Q Demodulators by Analog Devices

Status: Production
Series: AD8339
RoHS: Compliant
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The AD8339 is a quad I/Q demodulator 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 this 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) analog 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. In an ABF system, time domain coherency is achieved following the appropriate phase alignment and summation of multiple receiver channels. A reset pin synchronizes multiple ICs to start each LO divider in the same quadrant. Sixteen programmable 22.5° phase increments are available for each channel. For example, if Channel 1 is used as a reference and Channel 2 has an I/Q phase lead of 45°, then the user can phase align Channel 2 with Channel 1 by choosing the correct code.The mixer outputs are in current form for convenient summation. The independent I and Q mixer output currents are summed and converted to a voltage by a low noise, high dynamic range, current-to-voltage (I-V) transimpedance amplifier, such as the AD8021 or the AD829. Following the current summation, the combined signal is applied to a high resolution analog-to-digital converter (ADC), such as the AD7665 (16-bit, 570 kSPS).An SPI-compatible serial interface port is provided to easily program the phase of each channel; the interface allows daisy chaining by shifting the data through each chip from SDI to SDO. The SPI also allows for power-down of each individual channel and the complete chip. During power-down, the serial interface remains active so that the device can be programmed again.The dynamic range is typically 160 dB/Hz at the I and Q outputs. The AD8339 is available in a 6 mm × 6 mm, 40-lead LFCSP and is specified over the industrial temperature range of −40°C to +85°C.

Prices starting from US$19.76


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Logo for Analog Devices Analog Devices US$25.72
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Logo for Farnell Farnell US$20.83
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Logo for Newark Electronics Newark Electronics US$22.82
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Logo for element14 element14 US$19.76
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Logo for Chip One Stop Chip One Stop US$22.90
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Features

Quad integrated I/Q demodulator
16 phase select on each output (22.5° per step)
Bandwidth:
4LO: LF to 200 MHz
RF: LF to 50 MHz
Baseband: determined by external filtering
Power consumption: 73 mW/channel (290 mW total)
Quadrature demodulation accuracy:
Phase accuracy: ±1°
Amplitude balance: ±0.25 dB
Output dynamic range: 160 dB/Hz
LO drive: >0 dBm (50 Ω), single-ended sine wave
Supply: ±5 V
Power-down via SPI (each channel and complete chip)

Alternative Descriptions

Dual IQ Demodultor | 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 AD8339ACPZ?

Additional datasheets, footprints and schematics for AD8339ACPZ are listed on our Part Details page. You can also find images and similar parts to AD8339ACPZ on this page.

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What category does AD8339ACPZ fall under?

The AD8339ACPZ is listed under I/Q Demodulators.

Can I view similar or alternative parts?

You can view similar parts to AD8339ACPZ when available in the I/Q Demodulators range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

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Is the AD8339ACPZ RoHS compliant?

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

Which authorised distributors for AD8339ACPZ have stock available?

Authorised distributors including Analog Devices, Farnell, Newark Electronics, element14 and Chip One Stop have stock available or on a lead time for AD8339ACPZ.

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