Product category: Analogue and Mixed Signal ICs
News Release from: Maxim Integrated Products | Subject: MAX19692
Edited by the Electronicstalk Editorial Team on 22 August 2006
DAC synthesises in multiple Nyquist
zones
A 12bit 2.3Gsample/s DAC claims new industry standards among high-speed DACs that can directly synthesise high-frequency and wideband signals in multiple Nyquist zones.
Maxim Integrated Products introduces the MAX19692, a 12bit, 2.3Gsample/s digital-to-analogue convertor (DAC) that sets new industry standards among high-speed DACs that can directly synthesise high-frequency and wideband signals in multiple Nyquist zones The MAX19692 directly synthesises signals with up to 1GHz bandwidth in the frequency range from DC to more than 2GHz
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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This performance is 14dB better in SFDR than the competition operating at this high-output frequency.
"Leveraging its leadership in data convertor technology, Maxim has developed a new high-speed DAC architecture that advances the state-of-the-art in terms of update rate, dynamic performance and multi-Nyquist capability".
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"These performance enhancements are achieved with a dramatic decrease in power consumption", explains Ted Tewksbury, Managing Director, of Maxim's High-Speed Signal Processing Business Unit.
Operating from 3.3 and 1.8V supplies, the MAX19692 is a current-steering DAC with 4:1 multiplexed LVDS inputs and a 12bit convertor core.
The frequency response of the DAC can be configured to optimise signal synthesis in each of the first three Nyquist zones.
As a result, the device has higher SNR in 2nd and 3rd Nyquist and improved gain flatness compared with that of conventional DAC architectures, which are optimised for the 1st Nyquist zone.
Tim Church, Business Manager for the company's high-speed DACs, explains: "The device not only advances dynamic performance and wideband capability in higher order Nyquist zones, but it also achieves this at one-third the power".
At an update rate of 1.5Gsample/s, the MAX19692 consumes 950mW of power, 67% less power than the nearest competitor.
This part is specified for the -40 to +85C industrial temperature range and packaged in a space-saving, x 11mm, 169 CSBGA, less than two-thirds the size of the nearest competitor.
"This level of performance, direct high-frequency synthesis capability, low power consumption, and compact size is unprecedented in the industry", Tewksbury added.
The MAX19692's superior performance makes it ideal for high-performance wideband communications applications.
Examples include radar waveform and local oscillator (LO) signal synthesis, direct digital generation of wideband RF signals, ultra-high-datarate wireless modems, direct digital synthesis, automatic test equipment, and arbitrary waveform generators.
Designers and manufacturers of today's most demanding equipment and systems constantly face the challenge of adding higher performance and capabilities to their next-generation products.
The data convertor in the system's main signal path provides the critical link to the real world and dictates overall performance.
Next-generation requirements for high-speed data convertors are now demanding faster update rates, higher dynamic performance, and direct high-frequency synthesis capability - all with less power consumption and smaller size.
The MAX19692 provides the best combination of update rate, SFDR, direct synthesis, and multi-Nyquist capability in the industry.
This allows system engineers to design high-performance instruments and communications transmitters that directly synthesise wideband signals in the frequency range from DC to more than 2GHz.
The 2.3Gsample/s update rate allows generation of signals up to 1GHz in bandwidth.
The 68dBc SFDR performance and the gigasample-per-second update rate relax anti-aliasing image filter requirements for a given signal bandwidth, thereby reducing system cost and complexity.
The ability to synthesise signals directly in 2nd and 3rd Nyquist allows designers to eliminate upconversion stages, which again reduces system cost, power, board space, and design complexity.
All these benefits are realised without sacrificing overall system performance.
The combined 2.3Gsample/s update rate and multi-Nyquist capability of the MAX19692 enable new architectures not possible using yesterday's data-convertor architectures.
The MAX19692 DAC joins the company's recently announced 12bit ADC, the MAX1215N, which samples up to 250Msample/s and offers 66.7dB SNR and 84.7dBc SFDR at an input frequency of 100MHz.
With the new MAX19692, Maxim now offers over 125 high-speed ADCs and DACs optimised for most equipment segments and applications.
The MAX19692 is in full production.
Evaluation kits are also available to shorten design time.
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