POWER AND LINEAR IC SOLUTIONS

High-Speed Octal ADCs Enable Higher Channel Count in Portable Medical Designs

A new family of eight-channel ADCs from Analog Devices allows designers of portable instrumentation and ultrasound equipment to reduce design size by up to 60% and cut power consumption by 10%. The new range includes the AD9252, believed to be the industry’s first 14-bit, high-speed octal ADC, the 10-bit AD9212, and the 12-bit AD9222.

These eight-channel high-speed converters are suited for use in portable medical devices and ultrasound machines by virtue of their lower power consumption and reduced footprint. The AD9212 and AD9222 consume less than 100mW per channel, producing savings of more than 5W in a typical 512-channel ultrasound system. The AD9252 offers designers the highest available dynamic range for high-performance imaging applications, such as radar and sensitive non-destructive testing.


12-bit, 1.8V Octal ADC in Industry's Smallest Package

As well as reducing overall size the ADCs, available in 9mm x 9mm, 64-pin Lead Frame Chip Scale Packages (LFCSPs), simplify board layout and reduce design complexity. The three new devices are based on Analog’s AD9228 high-speed quad converter. The range offers sampling rates of up to 65MSPS and provides serial Low-Voltage Differential Signalling (LVDS) data outputs.

With figures for Signal-to-Noise Ratio (SNR) to Nyquist as high as 73dB, the ADCs can handle high sampling speeds without sacrificing performance. They also exhibit high linearity with typical DNL (Differential Non-Linearity) and INL (Integral Non-Linearity) figures of of ±0.3LSB and ±0.4LSB respectively. Input voltage is 2V p-p, full-power analogue bandwidth is 325MHz, and supply voltage is 1.8V.

Featuring internal data rate multipliers, the converters offer improved output data flexibility; programmable clock and data alignment can be controlled via the SPI interface, as can digital test pattern generation. Available patterns include built-in deterministic and pseudorandom patterns, along with custom user-defined test patterns. Also under SPI control are features such as full-chip and individual power-down modes, bit orientation, output resolution and standby mode.

Features

• Range of octal ADCs
• 10-bit, 12-bit, 14-bit options
• Low power: less than 100mW per channel
• Up to 65MSPS sample rate
• Excellent linearity: DNL ±0.3LSB, INL ±0.4LSB
• SNR to Nyquist up to 73dB
• Full-power analogue bandwidth: 325MHz
• LVDS output
• SPI interface controls:
  • Power-down modes
  • Bit orientation
  • Test pattern generation
  • Clock and data alignment
  • Output resolution
• Chip-scale packaging

Applications

• Medical imaging and non-destructive ultrasound
• Portable ultrasound and digital beam-forming systems
• Quadrature radio receivers
• Diversity radio receivers
• Tape drives
• Optical networking
• Test equipment

For further information, including Datasheets for the AD9212, AD9222 and AD9252, please click here