Overview
The AD8333ACPZ-REEL is a dual-phase shifter and I/Q demodulator produced by Analog Devices Inc. This component is designed to enable coherent summing and phase alignment of multiple analog data channels, making it particularly suitable for high-performance applications such as medical ultrasound equipment featuring Continuous Wave (CW) Doppler. The AD8333 integrates directly with the outputs of low-noise preamplifiers and includes a divide-by-4 circuit to generate the internal 0° and 90° phases of the local oscillator (LO) for the I/Q demodulators.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage, VS | 6 | V | ||
| RF Common-Mode Voltage | 2.5 | V | ||
| LO Common-Mode Voltage Range | 0.2 | 3.8 | V | |
| Phase Increment | 22.5 | Degrees | ||
| Quadrature Phase Error | -2 | +2 | Degrees | |
| I/Q Amplitude Imbalance | -0.05 | +0.05 | dB | |
| Channel-to-Channel Phase Matching | ±1 | Degrees | ||
| Channel-to-Channel Amplitude Matching | ±0.25 | dB | ||
| Quiescent Power Per Channel | 160 | 190 | mW | |
| Package Type | 32-lead LFCSP (5 mm × 5 mm) | |||
| Operating Temperature Range | -40 | +85 | °C |
Key Features
- Dual-phase shifter and I/Q demodulator for coherent summing and phase alignment of multiple analog data channels.
- Suitable for high-performance medical ultrasound equipment featuring CW Doppler.
- Direct interface with low-noise preamplifiers like those in the AD8332.
- Divide-by-4 circuit generates internal 0° and 90° phases of the local oscillator (LO).
- Sixteen discrete phase rotations in 22.5° increments can be selected independently for each channel.
- Asynchronous reset pin for synchronizing LO dividers in arrays.
- RoHS compliant and lead-free packaging.
Applications
- High-performance medical ultrasound equipment featuring CW Doppler.
- Analog beamformer circuits.
- Phase alignment and coherent summing in various RF and microwave systems.
Q & A
- What is the primary function of the AD8333?
The AD8333 is a dual-phase shifter and I/Q demodulator designed for coherent summing and phase alignment of multiple analog data channels.
- What type of applications is the AD8333 suitable for?
The AD8333 is particularly suitable for high-performance medical ultrasound equipment featuring CW Doppler and other RF and microwave systems requiring phase alignment.
- What is the phase increment of the AD8333?
The AD8333 allows for 16 discrete phase rotations in 22.5° increments per channel.
- What is the operating temperature range of the AD8333?
The operating temperature range is from -40°C to +85°C.
- What package type is the AD8333 available in?
The AD8333 is available in a 32-lead LFCSP (5 mm × 5 mm) package.
- Is the AD8333 RoHS compliant?
- How does the AD8333 interface with preamplifiers?
The AD8333 interfaces directly with the outputs of low-noise preamplifiers like those in the AD8332.
- What is the purpose of the asynchronous reset pin on the AD8333?
The asynchronous reset pin sets all the LO dividers in the same state when used in arrays.
- What is the quiescent power consumption per channel of the AD8333?
The quiescent power consumption per channel is between 160 mW and 190 mW depending on the phase bit settings.
- What are the key specifications for the LO common-mode voltage range?
The LO common-mode voltage range is from 0.2 V to 3.8 V.
