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TI said the newest members of its AFE family for medical ultrasound, the industry-first 16-channel AFE5851 and the 8-channel AFE5801 bring breakthrough power efficiency and smaller footprint to support the new market for handheld ultrasound systems that can fit in a doctor's pocket.
New uses of electronic medical devices and emerging economies are driving the need for innovative, handheld ultrasound systems. Doctors in remote regions and medical technicians in first responder situations need a non-invasive tool for accurate, on-site diagnosis. By carrying a system at all times, doctors can also use ultrasound for new application areas, such as diagnosis of cardiac conditions.
"We expect a broad range of new applications to emerge as ultrasound systems become handheld. Imagine how many more people could receive fast, effective medical diagnosis and treatment if every doctor could carry an ultrasound device in the pocket, just like a stethoscope," said Matt Harrison, general manager of TI's Medical business unit. "Portable ultrasound manufacturers choose the AFE58xx family for its high integration and power and noise optimization. With the new AFE5851 and AFE5801, TI is enabling high image quality with even lower power consumption to address this new market for small, handheld systems."
The new AFE5851 features 39 mW/channel at 32.5 MSPS and integrates 16 variable gain amplifiers (VGAs) and eight 12-bit, 65-MSPS analog to digital converters (ADCs). The ADC is shared between two VGAs and each VGA differential output is sampled at alternate clock cycles to optimize power efficiency. TI said the ADC has scalable power consumption to further lower power use with lower sampling rates. The AFE5851's high channel count and low-power features allow for increased channel density in handheld ultrasound systems.
The second new device, the AFE5801, features 50 mW/channel at 30 MSPS and 58 mW/channel at 50 MSPS and integrates eight VGAs and eight 12-bit, 65 MSPS high-speed ADCs with LVDS data outputs.
Both the AFE5851 and AFE5801 can be preceded by a transformer or an off-chip low-noise amplifier, which can be located on the probe. This new architecture results in at least 40 percent power savings when compared to other devices currently available on the market.
Available in a 9 mm x 9 mm package, the two new AFE58xx devices are the smallest analog front ends currently available in the market with a 70 percent smaller footprint than competitive analog front ends for ultrasound systems and 40 percent smaller than previously introduced devices in the AFE58xx family.
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