Product category:
Analogue and Mixed Signal ICs
News Release from: Cirrus Logic | Subject: CS556x/7x/8x family
Edited by the Electronicstalk Editorial
Team on 26 June 2007
Convertors claim best of both worlds
High-precision A/D convertors combine the higher-bandwidth low-distortion performance of a SAR convertor with high-resolution low-noise performance of delta-sigma ADCs.
Cirrus Logic reckons it has rewritten the rulebook for high-performance delta-sigma industrial ADCs with the introduction of the CS556x/7x/8x family of 16 and 24bit analogue-to-digital convertors Claimed to be unique in the semiconductor industry, Cirrus' new family of high-precision analogue convertors combines the higher-bandwidth low-distortion performance of a SAR convertor with high-resolution low-noise performance that is the hallmark of delta-sigma ADCs
This article was originally published on Electronicstalk on 22 Sep 2005 at 8.00am (UK)
Related stories
Stereo codec boasts superior audio quality
Rounding out its portfolio of stereo codec ICs for digital audio applications, Cirrus Logic has introduced the CS4270.
ADCs simplify stereo audio design
Two new stereo analogue-to-digital convertors target a variety of consumer and automotive audio applications.
The breakthrough combination of features provides designers of precision instrumentation, such as industrial process controllers, laboratory instrumentation, medical instrumentation, and high-speed weighing systems, with a significantly higher level of measurement accuracy, lower noise and higher throughput.
"This breakthrough performance means that various industrial applications will be able to obtain an extremely accurate measurement of data", says John Paulos, Vice President and General Manager, Industrial Products Division, Cirrus Logic.
"Greater measurement accuracy leads to a wealth of benefits for industrial systems such as systems for achieving tighter production yields, higher-precision machine tools, improved temperature control, valve control and speed of flow, just to name a few".
Further reading
HD receiver design brings Faroudja to mainstream
Genesis Microchip and Cirrus Logic have jointly developed a reference design for High Definition mainstream audio/video receivers (HD-AVR).
Volume control chip is a dynamic performer
A new analogue volume control IC promises unmatched audio quality performance for high-end consumer and professional audio applications.
Power meter chips boost measurement accuracy
New ICs help manufacturers of residential power meters to implement more reliable, lower-cost and higher-accuracy devices for measuring consumer power usage.
The CS556x family overcomes many of the critical performance issues associated with SAR and delta-sigma convertors.
SAR convertors are typically very sensitive to noise, whether the source of noise is in the convertor itself or in the system that the SAR convertor operates.
Virtually any noise present can - and often will - propagate directly to the output of the convertor.
The CS556x provides a much higher level of noise suppression than SAR convertors, resulting in higher accuracy conversions and reduced post-conversion processing while adding to the robustness of the system.
The CS556x also offers exceptional differential nonlinearity (DNL) error, which measures the accuracy of the ADC and is of critical importance in control applications.
The family features DNL error as low as +/-0.04LSB typical (CS5571), compared with +/-1LSB typical within SAR convertors.
In addition, the single-clock latency digital filter allows conversion-rate switching of the input with no loss in throughput.
The CS556x's high throughput precision performance stands out among high-resolution Delta Sigma convertors.
With near-flat digital FIR filter characteristics, the CS556x product line achieves unrestricted, wide-bandwidth signal throughput usually seen only in higher-speed SAR convertors - at resolutions up to 24bit.
With this flat filter, output data form a 1:1 representation of the input signal across the entire frequency range, up to the sampling rate of the convertor.
In comparison, most delta sigma convertors use Sinc filters, which attenuate the signal at specific frequencies.
The CS5560 offer 24bit resolution, a conversion rate of 50Ksample/s and is priced at US $8.45 in 1000-unit quantities.
The CS5570 offers 16bit resolution, a conversion rate of 100Ksample/s and is priced at US $10.95 in quantities of 1000.
The CS5580/81 offer 14bit resolution, conversion rate of 200Ksample/s and is priced at US $7.95 in quantities of 1000.
The ICs, which are currently in volume production, are available in 24-lead SSOP packages.
• Cirrus Logic: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
