Overview
The AD8339ACPZ-RL, produced by Analog Devices Inc., is a quad I/Q demodulator and phase shifter integrated into a single, ultracompact 40-lead chip scale package. This device is optimized for continuous wave (CW) analog beamforming (ABF) and I/Q demodulation, making it particularly suitable for high-density ultrasound scanners and other phased array systems. The AD8339 combines four identical I/Q demodulators, each with a separate RF input, and a 4× local oscillator (LO) input that generates the necessary 0° and 90° phases for the internal LO. This configuration allows for independent operation of each channel while maintaining a common LO, enhancing flexibility in system design.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | ±5 V | V |
| Power Consumption | 73 mW/channel (290 mW total) | mW |
| LO Drive | >0 dBm (50 Ω), single-ended sine wave | dBm |
| Output Dynamic Range | 160 dB/Hz | dB/Hz |
| RF Bandwidth | LF to 50 MHz | MHz |
| 4LO Bandwidth | LF to 200 MHz | MHz |
| Phase Accuracy | ±1° | ° |
| Amplitude Balance | ±0.05 dB | dB |
| Operating Temperature Range | −40°C to +85°C | °C |
| Package Type | 40-lead LFCSP (6 mm × 6 mm) |
Key Features
- Quad I/Q demodulators with separate RF inputs and a common 4× local oscillator (LO) input.
- Supports continuous wave (CW) analog beamforming (ABF) and I/Q demodulation.
- Sixteen programmable 22.5° phase increments per channel for precise phase alignment.
- Reset pin for synchronizing multiple ICs to start each LO divider in the same quadrant.
- Mixer outputs in current form for convenient summation of multiple receiver channels.
- Power-down capability via SPI for each channel and the complete chip.
- High channel-to-channel matching: phase match ±1° and amplitude match ±0.1 dB over the industrial temperature range.
Applications
- Medical imaging, particularly in high-density ultrasound scanners using CW ultrasound beamforming.
- Phased array systems.
- Radar systems.
- Adaptive antennas.
- Communication receivers.
Q & A
- What is the primary function of the AD8339?
The AD8339 is a quad I/Q demodulator and phase shifter, designed for continuous wave (CW) analog beamforming (ABF) and I/Q demodulation.
- What is the supply voltage range for the AD8339?
The AD8339 operates with a supply voltage of ±5 V.
- How many phase increments are available per channel?
Each channel has 16 programmable 22.5° phase increments.
- What is the power consumption of the AD8339?
The power consumption is 73 mW per channel, with a total of 290 mW for all four channels.
- What is the operating temperature range of the AD8339?
The AD8339 is specified to operate over the industrial temperature range of −40°C to +85°C.
- How does the AD8339 achieve phase alignment?
The AD8339 achieves phase alignment through a reset pin that synchronizes multiple ICs to start each LO divider in the same quadrant, and by using programmable phase increments.
- What are the key applications of the AD8339?
The AD8339 is used in medical imaging, phased array systems, radar, adaptive antennas, and communication receivers.
- What is the package type and size of the AD8339?
The AD8339 is available in a 40-lead LFCSP package with dimensions of 6 mm × 6 mm.
- Can the AD8339 be powered down?
Yes, the AD8339 can be powered down via SPI for each channel and the complete chip.
- What is the output dynamic range of the AD8339?
The output dynamic range is 160 dB/Hz.
