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8bit, 2GSps ADC is optimized for second Nyquist zone

Posted: 20 Jul 2007  Print Version  Bookmark and Share

Keywords:8bit 2.2GSps ADC  second Nyquist zone  ADC 

Maxim Integrated Products has introduced the MAX109, which the company claims to be the industry's highest-performance, 8bit, 2.2GSps ADC. The device offers excellent wideband dynamic performance that has been optimized for capturing input frequencies in the second Nyquist zone, said Maxim.

Fabricated using an advanced SiGe process, MAX109 integrates a high-performance track/hold (T/H) amplifier, a quantizer and a 1:4 demultiplexer on a single monolithic die. At a sample rate of 2.2GSps and an input frequency of 300MHz, the ADC achieves a spurious-free dynamic range (SFDR) of 62dBc and an SNR of 45dB. The SNR remains flat (within 1.6dB) for input frequencies all the way up to 2GHz.

MAX109 can also digitize/synthesize signals directly at RF, reducing or eliminating the need for RF downconverters. This wideband dynamic performance and integrated functionality make MAX109 well suited for applications such as broadband communication receivers, radar systems and high-end instrumentation systems.

The ADC supports either differential or single-ended inputs with a ±250mV voltage range. The output data is in standard LVDS format and is demultiplexed internally by a 1:4 demultiplexer. The LVDS outputs operate from a supply-voltage range of 3-3.6V, which enables compatibility with single 3V reference systems. Control inputs allow interleaving of additional MAX109 devices to increase the effective system-sampling rate.

The MAX109 device is offered in a 256-pin SBGA package and is specified over the extended temperature range of -40°C to 85°C. An evaluation kit will be available for ease of design.




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