Features and Benefits

  • 8 channels of LNA, VGA, AAF, ADC, and digital demodulator/decimator
    • Low power: 150 mW per channel, time gain compensation (TGC) mode, 40 MSPS
      62.5 mW per channel, continuous wave (CW) mode; <30 mW in power-down mode
    • 10 mm × 10 mm, 144-ball CSP_BGA
    • TGC channel input referred noise: 0.82 nV/√Hz, maximum gain
    • Flexible power-down modes
    • Fast recovery from low power standby mode: <2 μs
  • Low noise preamplifier (LNA)
    • Input referred noise: 0.78 nV/√Hz, gain = 21.6 dB
    • Programmable gain: 15.6 dB/17.9 dB/21.6 dB
    • 0.1 dB compression: 1000 mV p-p/750 mV p-p/450 mV p-p
    • Flexible active input impedance matching
  • Variable gain amplifier (VGA)
    • Attenuator range: 45 dB, linear-in-dB gain control
    • Postamplifier (PGA) gain: 21 dB/24 dB/27 dB/30 dB
  • See data sheet for additional features

Product Details

The AD9671 is designed for low cost, low power, small size, and ease of use for medical ultrasound applications. It contains eight channels of a VGA with an LNA, a CW harmonic rejection I/Q demodulator with programmable phase rotation, an AAF, an ADC, and a digital demodulator and decimator for data processing and bandwidth reduction.

Each channel features a maximum gain of up to 52 dB, a fully differential signal path, and an active input preamplifier termination. The channel is optimized for high dynamic performance and low power in applications where a small package size is critical.

The LNA has a single-ended to differential gain that is selectable through the serial port interface (SPI). Assuming a 15 MHz noise bandwidth (NBW) and a 21.6 dB LNA gain, the LNA input SNR is 94 dB. In CW Doppler mode, each LNA output drives an I/Q demodulator that has independently programmable phase rotation with 16 phase settings.

Power-down of individual channels is supported to increase battery life for portable applications. Standby mode allows quick power-up for power cycling. In CW Doppler operation, the VGA, AAF, and ADC are powered down. The ADC contains several features designed to maximize flexibility and minimize system cost, such as a programmable clock, data alignment, and programmable digital test pattern generation. The digital test patterns include built-in fixed patterns, built-in pseudorandom patterns, and custom user defined test patterns entered via the SPI.


  • Medical imaging/ultrasound
  • Nondestructive testing (NDT)

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Documentation & Resources

Tools & Simulations

Product Recommendations

AD9671 Companion Parts

Recommended Clock Drivers

Recommended A/D Converter

  • For sampling the I and Q signals in analog beamforming applications: AD7982.

Recommended Driver Amplifiers

Recommended Gain Control of VGA

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.