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TI ships delta-sigma ADC samples at 5Msa/s

Posted: 04 Apr 2003 ?? ?Print Version ?Bookmark and Share

Keywords:Texas instruments? ads1605? delta sigma adc? burr brown? analog converter?

Texas Instruments (TI) Inc. has released the ADS1605, which is touted to be the industry's fastest 16-bit delta-sigma ADC, capable of performing 5MSa/s.

A part of the company's Burr-Brown product line, the 64-lead TQFP device also offers an SNR or 88dB, THD of 99dB, and an SFDR of 101dB, making it suitable for use in scientific instrumentation, automated test equipment, data acquisition, medical imaging, and vibration analysis applications.

"The ADS1605 is twice as fast as the nearest delta-sigma competition and has roughly a 10dB to 15dB advantage in the key performance areas of SNR, THD and SFDR over competitive devices utilizing other architectures," said Jim Todsen, product line manager for TI's oversampling data converter products.

The ADS1605 features a 2.45MHz input bandwidth (-3dB) and passband ripple <0.0025dB (to 2.2MHz). It operates from a 5V analog supply and 3V digital supply. The digital I/O supply operates from 2.7V to 5.25V, enabling the digital interface to support a range of logic families.

Power dissipation is set by an external resistor and can be reduced when operating at slower speeds (315mW to 570mW). When not in use, the ADS1605 can be powered down with an I/O pin.

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