Analog Devices Inc. has introduced a new analog front-end (AFE) device for high-performance imaging applications that exhibits a 30% improvement in signal-conversion performance. The AD9970 is able to clock at speeds up to 65 megasamples-per-second, yet consume very low power, 155 mW. The new IC provides additional benefits that enable reducing the required circuit board real estate by 75%, compared with earlier devices. Because it combines data conversion, amplifier and timing capability in a single-chip design, the AD9970 AFE also reduces the component count required in a design.
Designers of today's high-performance HD imaging applications are challenged by sampling a charge-coupled device (CCD) and CMOS imager signals at rates exceeding 50 megasamples-per-second. In the past, solutions suffered from power dissipation and size limitations, as well as increased cost. But the AD9970 AFE alleviates these problems due to its high performance, low power and small size.
The AD9970 serves as a complete AFE comprising a variable gain amplifier, an analog-to-digital converter (ADC), as well as a high-performance programmable timing driver. Each component plays a role in conditioning and digitizing the signal delivered by the CCD. Also incorporated in the device are a variable gain amplifier (VGA) and a correlated double sampler (CDS) that are responsible for conditioning and digitizing the signal. The programmable timing driver further enhances performance by providing precise and localized control of high-speed CCD clock signals. An LVDS interface, responsible for handling the signal output, reduces EMI shielding requirements and thereby contributes to the ability to reduce package size to just 5 mm x 5 mm.
The AD9970 AFE is available now; the device is priced at $10.74 in 1000-piece quantities in a 5 mm x 5 mm LFCSP (lead-frame chip-scale package).
RSS
Save to Del.icio.us
Digg This