AD8333

Features: Dual integrated I/Q demodulator 16 phase select on each output (22.5° per step) Quadrature demodulation accuracyPhase accuracy: ±0.1°Amplitude balance: ±0.05 dB Bandwidth4 LO: 100 kHz to 200 MHzRF: DC to 50 MHzBaseband: determined by external filtering Output dynamic range: 161 dB/Hz LO...

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SeekIC No. : 004272147 Detail

AD8333: Features: Dual integrated I/Q demodulator 16 phase select on each output (22.5° per step) Quadrature demodulation accuracyPhase accuracy: ±0.1°Amplitude balance: ±0.05 dB Bandwidth4 LO: 100 kHz to ...

floor Price/Ceiling Price

Part Number:
AD8333
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/3/28

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Product Details

Description



Features:

Dual integrated I/Q demodulator
16 phase select on each output (22.5° per step)
Quadrature demodulation accuracy
Phase accuracy: ±0.1°
Amplitude balance: ±0.05 dB
Bandwidth
4 LO: 100 kHz to 200 MHz
RF: DC to 50 MHz
Baseband: determined by external filtering
Output dynamic range: 161 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





Application

Medical imaging (CW ultrasound beamforming)
Phased array systems
Radar
Adaptive antennas
Communication receivers





Pinout

  Connection Diagram

AD8333 Diagram




Specifications

Parameter Rating
Voltages
Supply Voltage VS
RF Pin Inputs
LO Inputs
Code Select Inputs V
Thermal Data-4 Layer Jedec Board
No Air Flow (Exposed Pad Soldered
to PC Board) JA
JB
JC
JT
JB
Maximum Junction Temperature
Maximum Power Dissipation
(Exposed Pad Soldered to PC Board)
Operating Temperature Range
Storage Temperature Range
Lead Temperature Range (Soldering 60 sec)

6 V
VS, GND
VS, GND
VS, GND



41.0°C/W
23.6°C/W
4.4°C/W
0.4°C/W
22.4°C/W
150°C
1.5 W

40°C to +85°C
65°C to +150°C
300°C


Function Demod
RF Freq (MHz) dc to 50
Phase Error (deg) 0.1Deg
Amplitude Error (dB) 0.05dB
NF 9dB
Noise Floor (dBm/Hz) -161
Voltage Supply (V) +/- 5
Supply Current 44mA
Package 32-Lead LFCSP





Description

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 for beamformer 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-four circuit generates the internal 0° and 90° phases of the 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 CH1 is used as a reference and the RF signal applied to CH2 has an I/Q phase lead of 45° then the user can phase align CH2 with CH1 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 an AD8021, configured as a transimpedance amplifier. The resultant signal is then applied to a high resolution AD converter (ADC) such as the AD7665 (16 b/570 ksps).

The two I/Q demodulators can be used independently in other nonbeamforming applications. In that case, a transimpedance amplifier is needed for each of the I and Q outputs, four in total for the dual I/Q demodulator.

The dynamic range is 161 dB/Hz at each I and Q output, but the following transimpedance amplifier is an important element in maintaining the overall dynamic range, and attention needs to be paid to optimal component selection and design.

The AD8333 is available in a 32-pin LFCSP (5 mm × 5 mm) package for the industrial temperature range of −40°C to +85°C.






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