TI delivers first ultrasonic analogue front end with digital demodulator in full production

Texas Instruments (TI) has introduced its first analogue front end (AFE) that integrates digital I/Q demodulation and decimation to reduce FPGA processing requirements in ultrasound systems as well as ultrasonic applications, such as sonar and non-destructive testing.

In addition to integrating digital I/Q demodulation on-chip, the AFE5809 also integrates a continuous wave Doppler (CWD) processor for blood flow velocity measurement on-chip, reducing the bill of materials (BOM) in medical ultrasound equipment. In addition the new AFE enables designers to optimise system performance with a variety of selectable power/noise combinations.

Among the device”s key features and benefits are: reduced FPGA processing requirements in that the on-chip digital demodulation results in less data throughput in the system and fewer LVDS traces, making it a far more cost effective design; an integrated CWD mixer and summing amplifier with a low close-in phase noise of -156 dBc/Hz at 1 KHz off of a 2.5-MHz carrier which allows for blood flow velocity measurements; the industry’s lowest noise and lowest power ultrasound AFE with digital demodulation – the device features the industry’s lowest noise of 0.75 nV/rtHz and lowest power consumption of 158 mW/channel.

In addition, each 14-bit, 65 MSPS analogue-to-digital converter (ADC) in the AFE5809 provides a 77-dBFS signal-to-noise ratio (SNR), resulting in crisp image quality; reset profiles: Digital I/Q demodulator with up to 32 preset configuration profiles simplifies designs and a full suite of features integrated into the AFE5809 allows designers to optimise system performance in their ultrasound and ultrasonic applications.



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