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High Speed Analog To Digital Converter

Tue, 02/13/2001 - 9:48am
Analog Devices announced a new analog-to-digital (A/D) converter and raised the speed bar for 10-bit converters above the 100 million-samples-per-second (MSPS) mark. The new AD9410 also features on-chip reference and track-and-hold circuitry that make it easier to design high-speed conversion into a variety of communications systems, such as local multichannel distribution service (LMDS) and multipoint multichannel distribution service (MMDS) network applications.

The AD9410 10-bit device can sample at over 200 million samples per second, providing designers of 8-bit IF digitized systems with the ability to opt for higher IF frequencies, which reduces system cost and complexity. This new A/D converter features 500 MHz analog bandwidth and a 54 dB signal-to-noise ratio (with a 99 MHz analog input). The chip operates with 5.0 and 3.3 volt supplies, and produces 3.3 volt CMOS/TTL-compatible outputs. The input signal range is 1.5 volt peak-to-peak differential, but the chip's analog input section is designed to prevent damage and data corruption even when the input is overdriven.

While designers can opt to use an external reference, the AD9410 A/D converter has a built-in 2.5 volt reference. The device's clock can be driven with a differential or single-ended clock signal, but differential clock input assures overall best performance.

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