Overview
The AD8333ACPZ-REEL7, produced by Analog Devices Inc., is a dual-phase shifter and I/Q demodulator. This device is designed to enable coherent summing and phase alignment of multiple analog data channels, making it particularly suitable for applications in high-performance medical ultrasound equipment featuring Continuous Wave (CW) Doppler. It is the first solid-state device of its kind, offering advanced functionality for beamformer circuits.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VPOS, VNEG) | ±4.5 | ±5 | ±6 | V |
| Quiescent Current (VPOS, all phase bits = 0, at 25°C) | 38 | 44 | 51 | mA |
| Quiescent Current (VNEG, all phase bits = 0, at 25°C) | −24 | −20 | −16 | mA |
| Quiescent Power (per channel, all phase bits = 0) | 160 | mW | ||
| Phase Shift Increments | 22.5° | |||
| Number of Discrete Phase Rotations | 16 | |||
| Operating Temperature Range | −40°C | +85°C | ||
| Package Type | 32-lead LFCSP (5 mm × 5 mm) |
Key Features
- Dual-phase shifter and I/Q demodulator for coherent summing and phase alignment of multiple analog data channels.
- Sixteen discrete phase rotations in 22.5° increments, selectable independently for each channel.
- Asynchronous reset pin to synchronize LO dividers in array configurations.
- Direct interface with outputs of dual-channel, low noise preamplifiers (e.g., AD8332).
- High channel-to-channel matching: ±0.05 dB phase match and ±0.25 dB amplitude match.
- Low power consumption: quiescent power per channel is 160 mW (all phase bits = 0).
- Industrial temperature range: −40°C to +85°C.
Applications
- High-performance medical ultrasound equipment featuring CW Doppler.
- Analog beamformer circuits.
- Phased array systems.
- Other applications requiring precise phase alignment and coherent summing of analog signals.
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 are the key applications of the AD8333? The AD8333 is primarily used in high-performance medical ultrasound equipment featuring CW Doppler and in analog beamformer circuits.
- How many discrete phase rotations can the AD8333 perform? The AD8333 can perform 16 discrete phase rotations in 22.5° increments.
- What is the operating temperature range of the AD8333? The operating temperature range is −40°C to +85°C.
- What is the package type of the AD8333? The AD8333 is available in a 32-lead LFCSP (5 mm × 5 mm) package.
- How does the asynchronous reset pin function? The asynchronous reset pin sets all the LO dividers in the same state when used in array configurations.
- What is the quiescent power consumption per channel? The quiescent power consumption per channel is 160 mW when all phase bits are set to 0.
- Can the AD8333 interface directly with low noise preamplifiers? Yes, the AD8333 can interface directly with the outputs of dual-channel, low noise preamplifiers such as the AD8332.
- What are the channel-to-channel matching specifications? The AD8333 has ±0.05 dB phase match and ±0.25 dB amplitude match between channels.
- What is the supply voltage range for the AD8333? The supply voltage range is ±4.5 V to ±6 V.
